Flower cultivation becomes a hugely profitable industry in the next 10 years, how to make millions?
Hugely profitable industry in the next 10 years: making millions from growing flowers. This project is not a gimmick, it is a real case from the Entrepreneur Servant exchange group. When it was mentioned in the group that someone made big money growing flowers, many old friends knew it was Sun Dehong. In less than 5 years since starting his business, he easily made over a million a year growing flowers. He chose the right industry and aimed at the business opportunity.
Hugely profitable industry in the next 10 years: making millions from growing flowers
This project is not a gimmick, it is a real case from the Entrepreneur Servant exchange group. When it was mentioned in the group that someone made big money growing flowers, many old friends knew it was Sun Dehong. In less than 5 years since starting his business, he easily made over a million a year growing flowers. He chose the right industry, aimed at the business opportunity, and quickly scaled up.
The potted flower market for aquatic flowers is gradually taking shape as people's spiritual pursuits increase. The demand for aquatic flowers in garden landscaping and water body greening is also constantly growing, so this project has certain market prospects. In addition, aquatic flowers love light, love warmth, tolerate moisture, have few pests and diseases, a high propagation coefficient, extensive cultivation management, small cultivation workload, low production cost, and simple management. Once introduced, they show results in the same year, making them suitable for women starting businesses.
The method of using aquatic flowers to improve river water quality and beautify the environment has been widely applied. Seizing this business opportunity, Sun Dehong, a villager from Xiligezhuang Village, Koudong Town, Baodi District, successfully became rich by growing aquatic flowers.
As soon as you walk into Sun Dehong's plantation, you see large patches of brightly colored lotus, thousand-leaved purple loosestrife in all sorts of forms, and many aquatic flower varieties whose names you cannot even name. Sun Dehong said he initially started growing aquatic flowers because he particularly liked lotus. He also likes to study cultivation techniques and breed new varieties in his spare time. This place is both his plantation and his laboratory.
In his spare time he also does some research. Some things are almost on the verge of extinction, like giant reed, boneset, and many others, more than a dozen varieties. I protect them all, so now there are more than 140 varieties, and about 40 varieties have sales and market demand.
After years of accumulating cultivation experience, Sun Dehong has become an expert in aquatic flower cultivation, and the surrounding markets have recognized the flowers he grows. This year, several parks in the city ordered more than 4 million yuan worth of aquatic flowers from him. Although the market has expanded, growing them by himself alone simply cannot meet market demand. Therefore, Sun Dehong founded a professional cooperative for aquatic flower cultivation, leading villagers from surrounding villages to grow aquatic flowers together.
Rohdea japonica - Is Rohdea japonica toxic? | Rohdea japonica pictures | How to grow Rohdea japonica
Rohdea japonica
The English name of Rohdea japonica is Rohdea japonica. Rohdea japonica is a perennial evergreen herbaceous plant, a plant that grows green leaves all year round, hence the name "evergreen". Rohdea japonica has quite a few names; for example, some people call it: winter-undecaying grass, nine-joint lotus, thousand-year yun, ebony poison, snake-cutting sword, and so on. Most Rohdea japonica are produced in southern China and Japan and other places, and it is a very popular ornamental plant.How to grow Rohdea japonica
Soil: When turning the soil and changing pots, try to do it in spring. Rohdea japonica cultivation does not have very high soil requirements, but it fears water accumulation most. Whether choosing ground planting or pot planting, hard clay or alkaline soil is most taboo. For potted plants, a mixed soil of leaf mold plus sand is mostly used for potting. Soil also varies by region. In the south, potted or open-field cultivation can be chosen; in the north, cultivation in a greenhouse is needed. Change the soil once a year, and change the pot once every 2 years. When changing the pot, appropriately add new fertile soil.
The effects of Rohdea japonica
The effects of Rohdea japonica: 1. Ornamental
The leaves of Rohdea japonica are broad and dark green, and the berries are bright red and round, very beautiful. It has always been a flower used for both foliage and fruit appreciation, with very high ornamental value.
Rohdea japonica flowering
Rohdea japonica generally blooms and bears fruit after being cultivated for three or four years. When it is in its prime, if it does not bloom for some reason, it can be planted in the ground in spring. After careful cultivation, abundant fruit can be seen from September to October. When it turns from green to red, move it indoors in time. The flowers produced by Rohdea japonica are generally red. Red is an auspicious symbol in China. In ancient and modern times, people have used it as a ceremonial decoration in all happy events such as building houses, moving homes, and weddings. Not only can the leaves of Rohdea japonica be appreciated, but the red fruits also remain for a long time without falling. It is an excellent item for indoor display, decorating halls, living rooms, and public places, carrying the meaning of "good fortune and everlasting green."
Rohdea japonica flower language
The flower language of Rohdea japonica: health, longevity
In themes and scenes of darkness and violence, this pot of Rohdea japonica plays an important role in diluting violence and making the picture and even the content harmonious. From this time on, Rohdea japonica became associated with the word "peace," bringing harmonious family blessings and environment to families that grow Rohdea japonica.
What to do if Rohdea japonica leaves turn yellow
Reasons Rohdea japonica leaves turn yellow: 1. Normal aging
If cared for properly, yellowing leaves of Rohdea japonica are normal metabolism. As the plant grows, the lower leaves begin to age and turn yellow. Solution: There is no need to worry about yellowing leaves from normal aging of Rohdea japonica, but yellow leaves, residual leaves, and some old leaves at the lower part of the plant should be pruned in time.
Rohdea japonica pests and diseases and solutions
Rohdea japonica pests and diseases: 1. Anthracnose
Anthracnose mainly occurs on the leaves of Rohdea japonica, and in severe cases can spread to the leafstalks. In the early stage, the lesions appear as small watery yellow spots. After expansion, they become oval to irregular brown or yellow-brown, slightly showing concentric rings. In the later stage, the lesions connect into a dry and withered appearance and produce small black spots arranged in concentric rings. This disease is mainly caused by poor ventilation. When there is damage by scale insects, it will favor the occurrence of the disease.
Is Rohdea japonica toxic?
Rohdea japonica is mainly toxic in its sap, and generally the tissue fluid in the stem is more toxic. If the mucus sticks to the hands or skin, it can cause allergic reactions, producing patches or a very itchy feeling. If you do not pay attention, scratching will make it itch more and more. Generally it also depends on which kind of Rohdea japonica it is. There are Dieffenbachia species and Aglaonema species, and the toxicity of these two varieties is not quite the same. Rohdea japonica is also a traditional Chinese medicine. Traditional Chinese medicine does not contain the sap, so it is non-toxic. That is why some people eat Rohdea japonica. The types of Rohdea japonica are different, so the concentration of the toxic liquid is also different. Some Rohdea japonica with mild toxic liquid will not cause much interference to the skin.
Types of Rohdea japonica
1. Dieffenbachia
The shape of Dieffenbachia: perennial evergreen herb. The stem is thick and fleshy, and the plant height can reach 1 m. The leaves are large and glossy, growing on the upper part of the stem, elliptical-ovate or broadly lanceolate, with an acuminate apex and entire margin, 20-50 cm long and 5-15 cm wide. Both sides of the leaves are dark green, inlaid with dense, irregular spots, markings, and patches in colors such as white, milky white, and pale yellow. Common horticultural varieties include Dieffenbachia amoena, Dieffenbachia camille, Dieffenbachia seguine, and others.
Rohdea japonica hydroponics
1. Selection of plants
For hydroponic Dieffenbachia, of course you must first select good plants. At present there are mainly two methods. One is to take branch cuttings from planted Dieffenbachia and root them in water; new roots can sprout in about 10 days. You can also use the root-washing water cultivation method, which means washing the roots of soil-grown Dieffenbachia and then cultivating it hydroponically. You can rinse repeatedly under tap water, but be careful not to damage the roots.
Does Rohdea japonica absorb formaldehyde?
A few Rohdea japonica plants may have a relatively small effect on purifying the air. The key is whether environmentally friendly paint is used. It is best to often open doors and windows for ventilation so that the paint smell dissipates as soon as possible.
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Rohdea japonica Rohdea japonica picture guide: how to grow Rohdea japonica / how to propagate Rohdea japonica
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Cultivation methods and precautions of Rohdea japonica Introduction to Rohdea japonica
Rohdea japonica (scientific name: Rohdea japonica) is the only species under the genus Rohdea. It is a perennial evergreen herbaceous plant, also known as yun, thousand-year yun, throat-opening sword, nine-joint lotus, winter-undecaying, winter-undecaying grass, iron shoulder pole, ebony poison, white sand grass, snake-cutting sword, and so on. It is native to southern China and Japan and is a very popular excellent ornamental plant. It has a long cultivation history in China, and its Chinese name "yun" means "a herbaceous plant that likes warmth."
Morphological characteristics of Rohdea japonica
The rhizome is 1.5-2.5 cm thick. Leaves 3-6, thickly papery, oblong, lanceolate, or oblanceolate, 15-50 cm long, 2.5-7 cm wide, acute at the apex, slightly narrowed at the base, green, with longitudinal veins obviously raised; sheath leaves lanceolate, 5-12 cm long. The scape is shorter than the leaves, 2.5-4 cm long; the spike is 3-4 cm long and 1.2-1.7 cm wide; with dozens of densely arranged flowers; bracts ovate, membranous, shorter than the flowers, 2.5-6 mm long and 2-4 mm wide; perianth 4-5 mm long and 6 mm wide, pale yellow, with thick lobes; anthers ovate, 1.4-1.5 mm long. The berry is about 8 mm in diameter and red when ripe. Flowering period May-June, fruiting period September-November.
Produced in Shandong, Jiangsu, Zhejiang, Jiangxi, Hubei, Hunan, Guangxi, Guizhou, Sichuan. It grows in moist places under forests or on grassy land, at an altitude of 750-1700 m.
The whole plant has the effects of clearing heat and detoxifying, and dispersing blood stasis and relieving pain. Potted plants are often grown everywhere for ornament.
Perennial evergreen herb, without aerial stem. The rhizome is thick and short, yellow-white, noded, and many slender fibrous roots grow from the nodes. Leaves are clustered from the rhizome, thick, lanceolate or band-shaped, 10-25 cm long and 2.5-5.5 cm wide, with margins slightly folded inward, gradually narrowing at the base into a petiole-like shape, dark green above, light green below, with multiple straight parallel veins, the main vein relatively thick. [1] In spring and summer, scapes grow from the leaf cluster, 10-20 cm long; flowers numerous, clustered at the top and arranged in a short spike; perianth 6-parted, pale green-white, ovate to triangular, pointed at the tip, broad at the base, fused below into a disc shape; stamens 6, sessile, anthers oblong; ovary spherical, style short, stigma 3-lobed. Berry spherical, orange-red; containing 1 seed.
Variety classification of Rohdea japonica: Dieffenbachia
[Alias] Tuftroot.
[Scientific name] Dieffenbachia maculata
[Family and genus] Araceae, Dieffenbachia.
[Morphology] Perennial evergreen herb. The stem is thick and fleshy, and the plant height can reach 1 m. The leaves are large and glossy, growing on the upper part of the stem, elliptical-ovate or broadly lanceolate, with an acuminate apex and entire margin, 20-50 cm long and 5-15 cm wide. Both sides of the leaves are dark green, inlaid with dense, irregular spots, markings, and patches in colors such as white, milky white, and pale yellow. Common horticultural varieties include Dieffenbachia amoena, Dieffenbachia camille, Dieffenbachia seguine, and others.
[Habits] Native to tropical America. It likes high temperature, high humidity, and semi-shade or shaded environments. It is not cold-tolerant, avoids direct strong light, and requires loose, fertile, well-drained sandy loam.
[Propagation] Mainly by cuttings. In spring from April to May, cut off the small plants growing from the base of the plant, let the wound dry slightly, or dip the wound in plant ash and insert it into plain sand. Pay attention to shading and maintaining moisture. It can take root and be potted in about 1 month.
[Cultivation] For potting, use 2 parts leaf mold, 1 part garden soil, 1 part river sand, plus a small amount of decomposed base fertilizer as the growing medium. During the growing season, to keep the pot soil moist, water more, preferring wet over dry, and at the same time supplement with misting the leaves. In autumn, control water, alternating dry and wet; in winter, pay attention to keeping the pot soil dry. During the growing period, fertilize generally once a month. Usually prevent direct sunlight and provide shade. Change the pot once every spring. The overwintering temperature in winter must not be lower than 10°C.
[Uses] Potted ornament. Suitable for decorating living rooms and studies.
Decorative application: Small potted plants can be placed on desks and windowsills for viewing. Medium potted plants are suitable for placing in the living room, beside the sofa as decoration, and can fill the interior with green vitality.
Light: Tolerates semi-shade, avoids excessively strong sunlight, but too dark light will also cause the leaves to fade.
Water: Likes moisture, and during the growing period from March to August it needs more watering. In summer, it needs frequent sprinkling to increase environmental humidity.
Temperature: Likes high temperature, not cold-tolerant, suitable growth temperature 20-30°C. The minimum overwintering temperature is above 12°C. Once frozen, the leaves turn yellow and wither, and the terminal bud dies.
Fertilizer: During the growing period, apply nitrogen fertilizer monthly to promote rapid growth. From March to August, apply fertilizer water once every two weeks. Reduce fertilization after autumn.
Soil: Requires loose, fertile, well-drained soil.
[Propagation]: Cutting propagation. Can be carried out in spring and summer. Take 10-15 cm long young shoots and insert them into yellow sand medium. They take root in 20-30 days. Afterward, repot into new pots according to plant size.
Ornithogalum caudatum
[Brief introduction] Ornithogalum caudatum is native to southern Africa. It likes sunlight, also tolerates semi-shade, and is cold-tolerant. In summer it fears direct sunlight and likes a moist environment. After heavy frost in winter, the leaf cluster still remains dark green. The bulb has a summer dormancy habit, strong dividing ability, and a high propagation coefficient.
[Propagation] Commonly propagated by bulb division and sowing. For natural bulb division propagation, dig up the bulbs in August-September, grade them by size, and plant them. After one planting, divide the bulbs again after several years when the bulbs become crowded. For sowing propagation, seedlings need to be cultivated for 3-4 years before they can bloom.
[Cultivation] It grows robustly and tolerates extensive management. Fertilize once every half month. The soil should be loose, moist, and well-drained. After flowering, remove the residual flower stalks, and it will bloom more abundantly the next year. The storage temperature of the bulbs is 25°C, and they need dry and ventilated conditions.
[Pests and diseases] Among diseases, there is mosaic disease. The virus is transmitted by aphids, and can be controlled by spraying with 2.5% derris extract at 800 times dilution.
[Application] Ornithogalum caudatum blooms from mid-April to early May. The flowers are white, orange, and double-flowered types. In spring, the star-shaped white flowers flicker, elegant and simple. It is an excellent material for arranging natural-style gardens and rock gardens, and is also suitable for cut flowers and potted ornament.
Aglaonema modestum
Also called Chinese evergreen. Aglaonema modestum is a perennial herb of Araceae, with a plant height of 60-70 cm. The stem is upright and unbranched, with obvious internodes.
Leaves alternate, petioles long, base expanded into a sheath. Leaves green, long lanceolate or ovate-lanceolate. It blooms in autumn, and the inflorescence is axillary, shorter than the petiole.
Its leaves are broad and glossy, emerald green in all four seasons, and especially shade-tolerant. It can be cut to make foliage bonsai or used as a foil for flower arrangements to decorate the environment, and can also be used for potted decoration of halls and rooms.
Chinese Rohdea japonica
Chinese Rohdea japonica is well known in ancient and modern times. It is emerald green and evergreen in all four seasons, and its orange-red abundant fruits do not wither in winter. Among the people it is regarded as a symbol of good fortune and is widely cultivated in both the north and south. In the north it is potted, and can be placed indoors for viewing in all four seasons.
Rohdea japonica is a perennial herbaceous flower of the genus Rohdea in the Liliaceae family. Underground it has a short, thick rhizome. Leaves grow in a cluster from the top of the rhizome, band-shaped or oblanceolate. The scape is relatively short, emerging from the leaf cluster, with a terminal spike, small white densely arranged flowers, and spherical orange-red berries. The flowering period is June to July. In the north, potted plants rarely bear fruit, and they are mainly grown for foliage.
The genus Rohdea is native to China, and this is the only species. Varieties include golden-edged Rohdea japonica, silver-edged Rohdea japonica, Dieffenbachia, as well as large-leaf, fine-leaf, and dwarf varieties. Commonly cultivated is also Aglaonema modestum, also known as bamboo-joint Rohdea japonica, a perennial herbaceous flower of Araceae, produced from South China, Southwest China, India to Malaysia. It shares the same name as Rohdea japonica but belongs to a different family and genus. Its varieties include the four queens: gold, silver, jade, and beauty. The leaf colors are inlaid like gold and jade, splendid and brilliant, and they all rank among the best indoor ornamental flowers today.
Rohdea japonica and Aglaonema modestum are potted plants and require culture soil rich in humus, loose and fertile, and slightly acidic. They like high temperature and high humidity, are not tolerant of severe cold, and overwintering must not be below 5°C. They like shade and avoid direct strong light. In winter they can be placed in a sunny place, and in summer they should be shaded. Avoid soaking by rain. Chinese Rohdea japonica is mainly propagated by division. Aglaonema modestum is mainly propagated by cuttings, preferably in March or from September to October. Aglaonema modestum can also have 8 cm long stem sections cut and soaked in clear water to produce roots before planting, or be grown in glassware in water to appreciate the leaves and roots, remaining unfaded for a long time. If you want the leaf color to be dark green, in spring and autumn apply a mixed solution of 0.2% urea and 0.1% potassium dihydrogen phosphate once or twice.
Rohdea japonica and Aglaonema modestum should have their pots turned and soil changed once every two or three years in early spring. After changing pots, place them in a warm, humid, shaded place, and frequently spray water on the leaf surfaces and surrounding environment to keep them moist. In the Beijing area, after mid-May they can be placed outdoors under a shade shed, and in early October brought indoors, placed in a place with fresh air and no smoke or dust pollution.
Rhoeo discolor
Rhoeo discolor alias: boat lily, purple Rhoeo, purple brocade orchid, Commelinaceae
Rhoeo discolor is native to Mexico and the West Indies
It is an evergreen perennial herbaceous plant. The leaves are lanceolate, green on the upper side with stripes in different shades, and purplish-red on the underside, also with stripes in varying shades of purplish-red (see figure). The stems and leaves are somewhat succulent. The flowering period is August-October, and it easily sets seed. The small flowers are white. Because the flowers grow inside two purplish-red large bracts shaped like mussels, resembling a mussel shell spitting out pearls, it is also called "mussel flower."
Its leaves have different colors on the two sides, emerald and bright with variations. The plant shape is moderate and the posture is graceful. The red bracts contain many jade-white small flowers, with obvious color contrast, strange and interesting, presenting the scene of a mussel shell spitting out pearls. It is very rare and never tires the eye.
Rhoeo discolor likes semi-shade and humid environments, likes fertile, loose sandy loam, is relatively drought-tolerant, fears exposure to the sun, and fears cold. It stops growing at 10°C, so overwintering above 10°C is better.
It has good shade tolerance and also relatively strong adaptability to dry climates, so it has become an excellent foliage plant for indoor cultivation in both northern and southern China. It can be placed for a long time in a bright living room. If the room is relatively dark, it is better to replace it about once every 20 days.
Its propagation is mainly by sowing. The tiny seeds can be sown as soon as collected. They sprout in half a month, and when the seedlings are 3-5 cm tall they can be transplanted. It can also be propagated by cuttings in spring and autumn. Cut off the top part with leaves, insert it into sandy soil, place it in a shaded place, do not overwater, and it will take root in about 20 days. When new leaves grow, shift to normal management. The remaining old stems can still send out new branches again.
Dieffenbachia seguine
Dieffenbachia seguine is also called Dieffenbachia amoena and dumb cane. It is a perennial herbaceous plant of Araceae. The stem is cylindrical and fleshy, and the stem often has white ring marks, which are traces left after leaves fall. The leaves of Dieffenbachia seguine are long elliptical, and on both sides of the green main vein the leaves are scattered with irregular white or goose-yellow spots and stripes, appearing especially graceful and elegant, like the stripes on a zebra, hence the name Dieffenbachia seguine.
Native to Colombia. It likes heat and humidity. The growth temperature should be controlled at 25°C to 30°C. In winter the room temperature should be kept at 15°C, with a minimum of 10°C. Dieffenbachia seguine is suitable for indoor cultivation. During cultivation, a water tray can be placed under the pot, with water in the tray, so that moisture can continuously pass through the small holes in the pot bottom to maintain the humidity of the pot soil.
Common varieties include:
1. Golden-edged Rohdea japonica (var. marginata).
2. Silver-edged Rohdea japonica (Var. variegata).
There are also other varieties such as large-leaf, fine-leaf, dwarf, and those with yellow-white markings. Japan and Taiwan, China have more of them.
Distribution area of Rohdea japonica
Rohdea japonica is native to China and Japan. It is widely distributed in China, found in East China, Central China, and Southwest China. The main producing areas include Zhejiang, Jiangxi, Hubei, and other places.
Ecological habits of Rohdea japonica
It likes to grow in moist places under forests or in grassy land.
It likes semi-shade, warm, humid, and well-ventilated environments. It is not drought-tolerant and is slightly cold-tolerant; it avoids direct sunlight and water accumulation.
General garden soil can be used for cultivation, but slightly acidic sandy loam rich in [2] humus, loose, and with good water permeability is best.
Propagation methods of Rohdea japonica
Both sowing and division propagation are possible.
The berries of Rohdea japonica mature in December. After maturity, they can be sown as soon as collected into pot soil mixed half-and-half with fine sand and leaf mold. Cover the pot with glass or tie on plastic film to maintain the pot soil's moisture, temperature, and light. If the temperature is controlled at 20°C, they can germinate in 20-30 days. When the seedlings grow to 3-4 leaves, they can be divided and potted.
(1) Division method: Division method: The underground stem of Rohdea japonica has strong sprouting ability. In spring and autumn, use a sharp knife to cut off new sprouts at the rhizome together with some lateral roots. Coat the wound with plant ash, plant into a pot, water slightly, place in a shaded place, and after 1-2 days water thoroughly. The whole plant can also be taken out of the pot, and depending on the size of the plant, cut it into several parts with a sharp tool. Let the wound dry for a day or coat it with plant ash, then pot it and manage as described above.
(2) Sowing method: Sowing is generally carried out from March to April. Sow in a flower pot filled with culture soil. After watering, temporarily place in a shaded place, keep moist, and under conditions of 25-30°C, they can germinate in about 25 days.
Cultivation techniques of Rohdea japonica: cultivation management
For potted Rohdea japonica, it is best to use sandy loam rich in humus as the culture soil. The soil pH for Rohdea japonica is 6-6.5, which can fully utilize soil nutrients and effectively promote Rohdea japonica to bloom and bear fruit. Change the pot regularly once a year. When changing the pot, remove rotten dead leaves and rhizomes, and use acidic soil with potassium fertilizer as the cultivation soil. After planting, place Rohdea japonica in a cool place for a few days to restore vitality.
Cultivation methods of Rohdea japonica: Keep it warm, humid, and semi-shaded. In summer, when growth is vigorous, it needs to be placed in a shaded place to avoid strong light, otherwise it easily causes dry leaf tips and scorched edges, affecting the ornamental effect. Therefore, after being taken outdoors in early spring, it should be placed under a shaded trellis or under the eaves or in a shaded place on a balcony. Rohdea japonica is a fleshy-root plant, and water accumulation easily leads to waterlogging. Too much watering easily causes root rot. But the air must be kept humid; if the air is dry, adverse phenomena such as dry leaf tips are also likely to occur. In summer, water should be sprinkled on the ground around the flower pot every morning and evening to create a humid microclimate. Also be careful to prevent heavy rain from pouring on it, especially during the flowering period it must not be rained on, and it should be placed in a shaded, dry, ventilated place not exposed to rain.
During the growing period, apply decomposed liquid fertilizer once about every 20 days. In early summer growth is more vigorous, and Rohdea japonica liquid fertilizer can be applied once about every 10 days. A small amount of 0.5% ammonium sulfate can be added to the topdressing. In this way, it can promote better growth, and the leaf color becomes dark green and glossy. In the vigorous flowering period of June-July, apply a 0.2% potassium dihydrogen phosphate aqueous solution once about every 15 days to promote flower bud differentiation and facilitate better flowering and fruiting (around the Beginning of Summer, several old leaves on the outer part of mature plants should be cut off to facilitate the sprouting of new buds, new leaves, and the emergence of scapes).
In winter, Rohdea japonica needs to be moved indoors for overwintering, placed in a sunny, well-ventilated place, with the temperature kept at 6-18°C. If the room temperature is too high, it easily causes leggy leaves and consumes a large amount of nutrients, so that growth is weakened the next year and normal flowering and fruiting are affected. If Rohdea japonica shows yellow and scorched leaf tips in winter, or even the whole plant withers, it is mainly caused by the roots being unable to absorb water, affecting growth. Therefore, in winter the air must also be kept humid and the pot soil slightly moist. Generally, watering 1-2 times a week is suitable. In addition, the leaves need to be sprayed and washed with warm water once a week to prevent the leaves from being polluted by smoke and dust, so as to keep the stems and leaves fresh green in color and emerald green in all four seasons.
Cultivation key points
The planting environment should be kept warm, humid, and semi-shaded. In summer, it is best to place it indoors about 80 cm from a south-facing windowsill or outdoors in a shaded place, avoiding direct strong sunlight, otherwise the leaves are easily scorched. In addition to sufficient watering, water should be sprinkled on the ground around the flower pot every morning and evening to create a humid microclimate. Pay attention to water control. After bringing it indoors in winter, the room temperature must not be lower than 12°C. If the room temperature is too low, it easily causes the plant to suffer cold, drop leaves, and die.
Precautions
1. Planting: Plant in spring or turn the pot and change the soil. It has low soil requirements, but fears water accumulation. When ground planting or potting, avoid hard clay and alkaline soil. For potting, generally use a mixed soil of leaf mold plus sand. In the south it can be potted or cultivated in the open field; in the north it needs greenhouse cultivation. Change the soil once a year, change the pot once every 2 years, and supplement with new fertile soil.
2. Light and temperature: Rohdea japonica likes a semi-shaded environment and fears direct sun in summer. For greenhouse cultivation, shade more than 60% in spring, summer, and autumn, and 40% in winter. Too strong light easily causes sunburn, and too weak light makes it difficult to bloom and bear fruit. The suitable growth temperature is 15-18°C. In winter dormancy, move it into the greenhouse, place it in a sunny place, keep the temperature above 10°C, and the minimum temperature must not be lower than 5°C. In the Yangtze River basin it can overwinter in the open field. Although the leaves may suffer frost damage, new leaves can still sprout again the next year.
3. Watering and fertilization: During the growing season, apply liquid fertilizer once every 10-15 days. In summer, strengthen ventilation, prevent heatstroke and lower temperature, and supply sufficient water, often keeping the pot soil moist and the surrounding air humid. In summer, water 1-2 times a day. In winter, reduce watering and stop fertilizing.
4. Shaping and pruning: In order to maintain a good plant shape and improve ornamental value, as the plant grows, yellow leaves, residual leaves, and some old leaves at the lower part of the plant should be pruned in time. When growing in pots at home, you can use a soft cloth dipped in beer to wipe the leaves, which can both remove dust and add nutrients to the leaves, making them bright green and clean.
Cultivation of Rohdea japonica (Japanese sacred lily)
Depending on the growth cycle or plant form, the distribution varies, and cultivation methods also differ somewhat. The bulbous scales grow on or below the soil surface, oval or spherical in shape; the leaf flesh is thick and succulent, evergreen, alternately arranged on both sides from the base, with a beautiful sheen on the surface, tongue-shaped; flowers bloom singly, with small pedicels, numerous stamens with yellow anthers at the tips, because Japanese people feel they closely resemble the brushes used by ancient Japanese court ladies to brush away excess white powder from their eyebrows, hence the name "eyebrow brush hair." The berries are spherical and red, and the seeds resemble those of Clivia, being fleshy.
Rohdea japonica is strong in both heat and cold tolerance, with a minimum of around 5°C, though evergreen varieties are best kept above 8°C so the leaves retain their beautiful ornamental value. It is robust in constitution and free from pests and diseases, but attention should be paid to damage from spider mites; if any are seen, a small amount of insecticide can be sprayed.
Cultivation is quite easy; avoid direct strong light. In summer, place it in a ventilated semi-shaded spot for cultivation. It can be kept indoors, but ensure sufficient light to prevent leggy leaf growth that affects development. It has good drought tolerance and dislikes high humidity; if the soil is too wet, the bulb is prone to rotting. During the growing period, water thoroughly after the surface soil dries, and apply Hyponex No. 2 or diluted Hyponex solution once a month as a watering. However, as the dormant period approaches, gradually reduce the frequency and amount of watering; during dormancy, watering can be stopped, though evergreen varieties can still be given a little water during dormancy to maintain the emerald green of the leaves.
Repotting can be done at the end of the dormant period or the beginning of the growing period; summer-dormant types around July, winter-dormant types around April. Use well-draining soil; a mix of small-grained akadama soil and Dabutie potting soil works well. When planting, let about half the bulb remain above the soil surface, planting it shallowly in the pot.
Propagation is generally by dividing the bulbs or by sowing seeds. The bulbs can be divided about once every 3-5 years, which is a very simple and easy method. Alternatively, after the flowers fade, the mature fleshy seeds from the spherical berries can be sown, but the germination rate of the seeds decreases as storage time lengthens, as they do not store well, so they should be sown as soon as possible. For Rohdea japonica, from seed germination to blooming takes at least 3-4 years, truly a long wait!
Rohdea japonica is easy to cultivate and robust in constitution. Normally, its fresh green leaves can be enjoyed as a foliage plant, and when it blooms, its peculiar flowers can also be appreciated. It is quite suitable for beginners growing succulents to cultivate.
Care Knowledge: Aglaonema modestum (Chinese evergreen)
An evergreen herbaceous plant of the Araceae family, Aglaonema genus, also known as painted drop-tongue. The stem is upright, 40 cm to 50 cm tall. Leaves are ovate to ovate-lanceolate, with a blunt base and acuminate tip. The inflorescence emerges from the lower sheath, with a small, green spathe.
Native to southwestern and southern China, also distributed from India to Malaysia. It prefers a warm, humid, and lightly shaded environment. For potting, a loose, fertile, humus-rich, well-draining slightly acidic soil is suitable. It is not cold-tolerant; the overwintering temperature is 5°C to 8°C. The leaf surface needs frequent misting, and the potting soil should be kept moist at all times. Propagation is mainly by cuttings, which root very easily at 25°C, or by division.
Aglaonema modestum is very adaptable to indoor environments. It can be grown in pots or placed in vases, where it will continue to grow and remain unfading for a long time. Common famous varieties include: Aglaonema commutatum 'Java', with a short stem, branching at the base, ovate leaves with white spots and white veins. Aglaonema commutatum 'Variegatum', shrub-like, with irregular bright green or grayish-white markings on the leaf surface. Aglaonema commutatum 'Yellow Stripe', with white stems marked with green lines, branching. The leaf surface has irregular yellow-brown markings, and the spathe is greenish-white. These three varieties of painted drop-tongue are not cold-tolerant; the suitable overwintering temperature should not be below 18°C.
Dieffenbachia (Dumb Cane)
The leaves of Dieffenbachia have numerous irregular white or pale yellow spots, with vivid tones, remaining green throughout the four seasons.
[Water]: Likes moisture. Water more in summer, but avoid waterlogging; frequently mist the leaf surface. Reduce watering in winter. Do not let it get rained on during the flowering period.
[Fertilizer]: Not demanding regarding fertilizer. Apply base fertilizer when repotting; generally no additional fertilizing is needed.
[Soil]: Highly adaptable, but loose, well-aerated, slightly acidic loam is most suitable.
[Temperature]: In northern regions, it needs to overwinter indoors; in the Jiangnan region, it can overwinter outdoors. Above 5°C, no frost damage will occur.
[Light]: Likes semi-shade, avoid exposure to direct sun. Indoors, place in a ventilated spot with indirect light.
[Propagation]: Division. In early spring, separate the suckering shoots and plant them with roots attached; they establish easily. Sowing is also possible, but generally not used. Division can be done in conjunction with repotting, generally once a year; separate the clustered plants into several clumps and plant them separately, dividing once every 3 years.
Tradescantia spathacea (Moses-in-the-cradle)
Tradescantia spathacea, also called purple brocade orchid, is an evergreen perennial herb of the Commelinaceae family. The leaves are broadly lanceolate, arranged in a rosette on a short stem; the leaf surface is smooth and deep green, and the leaf underside is dark purple; the flowers are axillary, with white flowers enclosed by two mussel-shell-like purple bracts, and the filaments have long white hairs. It is a commonly cultivated indoor foliage plant.
This plant is native to Mexico and the West Indies. It prefers a warm, humid climate and grows best in environments at 15-25°C. It likes light but also tolerates shade, fears scorching sun, and requires fertile, water-retentive soil.
For potting Tradescantia spathacea, a mix of 2 parts pond mud and 1 part peat is suitable. Because of its strong adaptability, management is relatively extensive. Except from May to October, when it needs shading or placement in a semi-shaded spot, it should be given ample light at other times; watering should err on the side of moisture rather than dryness, but it should not be overly wet or waterlogged, otherwise the roots will rot over time; in dry weather, mist frequently to maintain high air humidity in the growing environment. Fertilizing should not be excessive; applying cake fertilizer water once or twice is sufficient. In winter, place it indoors in a humid spot, maintain around 6-10°C, and keep the soil slightly moist, not too wet.
Tradescantia spathacea is mostly propagated by division, but can also be propagated by cuttings or sowing. Division is usually done in spring when repotting; the method is to cut the dense mother plant apart at the gaps with a sharp knife. Cuttings can be taken during the growing season; cut 7-10 cm of the stem tip, remove the lower leaves, insert into sand, keep moist, and roots will form in about 2 weeks. Sowing is often done in April in pots; seedlings grow rapidly after emergence. When the seedlings reach about an inch tall, transplant promptly, and by autumn of that year they can grow into full plants.
Dieffenbachia seguine (Zebra leaf Dieffenbachia)
Dieffenbachia seguine is native to Colombia. It prefers a warm, humid climate, with an optimal growth temperature of 25°C to 30°C. In winter, the indoor temperature should also be maintained around 15°C, with a minimum of 10°C. For potting soil, a mix of 7 parts leaf mold, 3 parts loam, and 1 part sand can be used. Dieffenbachia seguine likes semi-shaded environments and avoids direct sunlight; it can be grown indoors year-round. It tolerates water and moisture; a water tray can be placed under the pot, with water in the tray, so that water continuously seeps into the potting soil through the small holes at the bottom of the pot. In winter, watering should be restricted; the lower the temperature, the more attention should be paid to watering less. In winter, some leaves may turn yellow and drop, but as long as they are not frozen, new leaves can sprout again the following spring. If kept indoors for the winter and growth is weak with a tendency to become leggy, it can be placed outdoors in a semi-shaded spot for a period during the growing season, and moved back indoors after vitality is restored. Fertilizing can be done during the growing season, depending on growth vigor, once or twice a month, applying more decomposed liquid fertilizer or compound fertilizer to promote lush green leaf color, but nitrogen fertilizer should not be used excessively.
Its "flower" is the typical spathe-and-spadix inflorescence of the Araceae family. It rarely or never sets seeds, so it is difficult to propagate by seed. Propagation is basically asexual, mainly by tissue culture and cuttings. Tissue culture propagation has a high success rate and low cost, but requires certain equipment and conditions. The cutting method involves cutting old stems into 10-15 cm sections in spring, inserting them obliquely into sandy soil, keeping moist, and transplanting into pots after roots and leaves form. Alternatively, during the peak growing season, cut the stem into sections with one or two nodes, about 5-6 cm long, let them dry for a few days until the cut surface is dry, then plant directly into pots, keep moist, and they will quickly root and produce leaves. You can also cut stem sections with leaves and insert them into a transparent glass water bottle, fix them with white rice stone used for architectural decoration, and in about half a month you can see it grow pure white jade-like fibrous roots, allowing you to appreciate both leaves and roots. Because its sap is toxic, take care during handling not to let it touch the skin, mouth, or eyes. There are more than 30 species in the same genus as Dieffenbachia seguine, which also have some ornamental value, but this species is the largest; its leaves are thick and hard, with elegant and beautiful markings and sheen, the plant is tall, and the stem is stout, making it an ideal indoor ornamental specimen.
Other Types
The key cultivation points are: warmth, humidity, and semi-shade. In summer, potted plants are best placed indoors about 80 cm from a south-facing windowsill, or outdoors in a shaded spot, avoiding direct strong sunlight, otherwise the leaves are easily scorched. In addition to ample watering, water should be sprinkled on the ground around the flowerpot every morning and evening to help create a humid microclimate. During the growing period, do not water too much; when the surface of the potting soil turns white, that is the right time to water. Apply liquid fertilizer once every half month.
In the north, after moving indoors for winter, the room temperature must not be below 12°C. If the temperature is too low, it easily leads to chilling, leaf drop, and death. In winter, rinse the leaf surface once a week with warm water to prevent the leaves from being soiled by smoke and dust, keeping the stems and leaves fresh and beautiful.
Management
For potted Rohdea japonica, a sandy loam rich in humus is suitable as the potting medium. A soil pH between 6-6.5 is more conducive to fully utilizing the effectiveness of nutrients and is suitable for the plant to flower and fruit. Repot once a year in March-April or October-November. When repotting, remove aged rhizomes and persistent dead leaves, and plant in fertilized acidic cultivation soil. After potting, place in a shaded spot for a few days. The key cultivation points of Rohdea japonica are: warmth, humidity, and semi-shade. In summer, when growth is vigorous, it should be placed in a shaded spot to avoid strong light, otherwise it easily causes dry leaf tips and scorched edges, affecting the ornamental effect. Rohdea japonica has fleshy roots and most fears waterlogging; therefore, it should not be watered too much, otherwise it easily causes root rot. Normally, an appropriate amount of water for the potting soil is sufficient; water only when the potting soil is dry, preferring it slightly dry rather than too wet. Except in summer, when the potting soil must be kept moist, watering in spring and autumn should not be too frequent. In summer, water should also be sprinkled on the ground around the flowerpot every morning and evening to create a humid microclimate. Also be careful to protect it from heavy rain.[3]
During the growing period, apply decomposed liquid fertilizer once every 20 days or so; in early summer when growth is more vigorous, apply liquid fertilizer once every 10 days or so, and a small amount of 0.5% ammonium sulfate can be added to the topdressing, which can promote better growth and make the leaf color dark green and glossy. During the peak flowering period in June-July, apply a 0.2% potassium dihydrogen phosphate aqueous solution once every 15 days or so to promote flower bud differentiation, which helps better flowering and fruiting. During the flowering period, it must not be rained on; place it in a shaded, dry, ventilated place protected from rain.
In winter, Rohdea japonica needs to be moved indoors for overwintering, placed in a sunny, well-ventilated spot, with the temperature maintained at 6-18°C, preventing the room temperature from being too high, which would cause the plant to consume nutrients excessively.
Fruiting
The fruit of Rohdea japonica often does not set easily. How can it be made to bear fruit?
① Do not water too frequently; water only when the potting soil is dry. Prefer slightly dry over too wet.
② Do not let it get rained on during flowering; place it in a cool, ventilated place protected from rain.
③ Do not fertilize too much; applying winter fertilizer once a year is sufficient.
④ There must be an environment that allows snails to transfer pollen.
If the above four points can be achieved, fruiting can generally be expected. It flowers in May-June and the fruit ripens in September-October. Under normal conditions, the fruit does not drop throughout the winter.
Leaves
Rohdea japonica likes warm, humid, and semi-shaded environments, and avoids direct strong light in summer. The key to growing Rohdea japonica well is to avoid direct strong light when the weather is hot and the sunlight is intense in summer. Otherwise, it easily causes dry leaf tips, scorched edges, or even yellowing and withering, affecting the ornamental effect.
Therefore, after taking it outdoors in early spring, it should be placed under a shaded trellis, eaves, or in a shaded spot on a balcony, taking care to protect it from rain. In addition to keeping the potting soil moist in summer, watering in spring and autumn should not be too frequent, and watering should be controlled in winter. Rohdea japonica has fleshy roots and therefore most fears waterlogging; if watered too much, the roots easily rot. However, the air must be kept humid; if the air is dry, undesirable phenomena such as dry leaf tips also easily occur.
In spring and autumn, apply decomposed cake fertilizer water once every 3-4 weeks, which can make the plant grow robustly and the leaves green. In addition, around the Start of Summer, several old leaves on the outer periphery of mature plants should be cut off to facilitate the sprouting of new shoots and new leaves and the emergence of flower stalks.
Cold Damage
When the winter temperature is below 5°C, Dieffenbachia is highly susceptible to cold damage, and if not managed promptly, it can lead to death. So, what measures should be taken after cold damage occurs?
[Slight cold damage]: The leaf surface loses its proper sheen, and the leaves droop as if dehydrated. At this point, move the Dieffenbachia to a warmer place and let it gradually return to normal. Note that the temperature must not rise abruptly after the damage, to avoid leaf wilting.
[Mild cold damage]: In addition to drooping, the leaves develop cold-damage patches resembling scalding by boiling water. When handling, cut off the cold-damaged patches on the leaves and move the plant to a warm place.
[Moderate cold damage]: Most of the leaves show cold patches, and the petioles show water-soaked patches and lose their green color. At this point, cut off the leaves together with the petioles, apply plant ash or coal ash to the wounds, then place in a warm spot, control watering appropriately, and let it slowly return to normal.
[Severe cold damage]: The young branches and new leaves lose their green color and show water-soaked patches, and the underground root system is chilled and rots. The remedy is to promptly dig up the plant, cut off the underground parts, and cut off the damaged branches and stems; after applying plant ash to the wounds, store in moist plain sand, and take cuttings in early spring. If severe cold damage occurs and the entire plant shows lesions, the hope of saving it is very slim, and replacing the plant should be considered.
Pest and Disease Control of Rohdea japonica
During the growing period, Rohdea japonica is susceptible to leaf spot, anthracnose, scale insects, brown soft scale, and other problems.
(1) Leaf spot. This disease occurs on the leaves of Rohdea japonica, and is prone to occur in weather with high humidity. The lesions initially appear as small brown spots, with a water-soaked faded green margin, expanding in concentric rings, round to oval, with brown edges and grayish-white centers. In the later stage, dark brown mold spots appear in the center of the lesions, becoming a dark brown mold layer under humid conditions. The control method is to promptly remove diseased and dead leaves; both in the early and late stages of the disease, spray with 0.5%-1% Bordeaux mixture (or 50% carbendazim 1000x solution).
(2) Anthracnose. This disease also occurs on the leaves of Rohdea japonica, and in severe cases can spread to the petioles. The lesions initially appear as water-soaked small yellow spots, expanding to oval to irregular brown or yellow-brown, slightly showing concentric rings; in the later stage, the lesions merge into a dry, withered appearance and produce small black dots arranged in concentric rings. This disease is mainly caused by poor ventilation; the presence of scale insect damage favors the occurrence of the disease. The control method is to strengthen care and increase phosphorus and potassium fertilizers; in the early stage of the disease, spray with 0.3%-0.5% equal-amount Bordeaux mixture (or 60% zineb 800-900x solution, or 70% thiophanate 1500x solution).
(3) Brown soft scale. This insect has a complex feeding habit and can damage many plants; Rohdea japonica is one of the affected flowers. When brown soft scale damages plants, it generally clusters on the leaf surface or tender leaves, piercing and sucking the plant sap, while excreting a sticky liquid; its excrement easily causes mass reproduction of sooty mold fungi, turning the stems and leaves black, affecting the plant's photosynthesis, causing weak growth and yellowing leaves, and hindering ornamental value. In severe cases, the branches and stems are covered with insect bodies, causing the plant to yellow and affecting growth.
Control methods: ① If there are few affected plants or few insects, generally scraping off the insect bodies with a bamboo strip or similar is sufficient; ② During the nymph hatching period, spray with 40% dimethoate emulsifiable concentrate 1000x solution (or 40% omethoate emulsifiable concentrate 1000x solution), and spraying with 5% phosmet emulsifiable concentrate 1000x solution can also kill them.
[Distribution] Jiangsu, Zhejiang, and other places.
[Symptoms] In the early stage of the leaf disease, water-soaked small spots appear on the leaf underside; after 2-3 days, the lesions slightly sink, becoming small brown spots the size of a needle tip, round or irregular, later gradually expanding into dark brown or reddish-brown round or irregular lesions, 1.5-3.0 mm in diameter, with the lesions slightly concentric-ringed and a faded zone around the margin. Many spots can occur on a single leaf, especially on the older leaves at the lower part, where there are even more spots. The expanding lesions gradually merge together, and the veins and petioles also turn brown, causing most of the leaf to die; the stem symptom is called black rot, with the vascular bundles of the diseased stems and branches turning brown to black. At this point, the leaves on the stems wither, showing polygonal necrosis symptoms, after which bacteria infect the pith and cortex, leaving only a few leaf clusters at the branch tips, with the entire stem turning black, shrinking, and rotting. When cuttings are affected, they cannot root, and slowly rot from the base upward, with the leaves withering and showing polygonal necrosis.
[Pathogen] The pathogen is a bacterium, Xanthomonas campestris pv. pelargonii of the class Eubacteria, order Eubacteriales, genus Xanthomonas, with a rounded tip, rod-shaped, and a single polar flagellum. The optimal temperature for growth and development is 25-27°C, the minimum is 1°C, and the lethal temperature is 51-51.5°C.
[Disease Development Pattern] The bacterium can spread via cuttings, contact, and splashing water droplets, and seeds may carry the bacterium and spread it; in moist soil the pathogen can survive for 3 months; in greenhouse cultivation, when plants are too densely planted and growing rapidly, the disease tends to be severe; older leaves at the lower part of the plant are more severely affected; it is severe when warm and humid; high nitrogen, high phosphorus, and low calcium favor the disease, while high potassium, low phosphorus, and high calcium suppress the symptoms. Different species and varieties of Pelargonium differ in disease resistance; among Pelargonium varieties, Pelargonium grandiflorum is highly resistant, Pelargonium graveolens is moderately resistant, and Pelargonium peltatum is highly susceptible. Some plants of the Geraniaceae family are asymptomatic carriers.
[Control Methods]
(1) Horticultural control: Ensure ventilation and light penetration between plants, avoid excessively high humidity; do not spray water directly on plants, to avoid spreading disease via splashing droplets; do not select cuttings from diseased plants; remove all diseased leaves and branches, and avoid contaminating leaves with bacteria-carrying soil. Diseased soil should be treated centrally, and when necessary, sterilize the soil and flowerpots. The pathogen can survive in the soil on propagation beds, so avoid splashing diseased soil onto healthy plants. Spray 1% Bordeaux mixture once every 10-15 days for prevention.
(2) Chemical control: Spray agricultural streptomycin 1000 units, or try 14% copper ammonium complex 300x solution, or 50% xiaojunling 1000x solution.
(3) Thoroughly remove all diseased plants and plant debris. Soak and disinfect flowerpots, planting benches, and tools with 10% bleaching powder solution; disinfect soil with 2% formalin solution, or replace with new soil. Use disease-free seedlings.
(4) Before and after the onset of the disease, spray 1% Bordeaux mixture or (500-1000) × 0.000001 agricultural streptomycin, for several consecutive applications.
Medicinal and Dietary Value of Rohdea japonica
The medical information and health dietary information on Huhuawang are for reference only and cannot be used as a basis for diagnosis or medical treatment. For any health problems, consult professional medical personnel; for the treatment of any disease, follow medical advice.
Ultimate flower-protecting mission: To love yourself, start from reality and follow medical advice. For illness, do not be careless, do not delay, do not give up hope; face it bravely, warm the silent world with love, and care for the flower field within your heart with your heart.
Medicinal Value
Rohdea japonica is the plant Rohdea japonica of the Liliaceae family, Rohdea genus, used medicinally as the rhizome or the whole plant. Rohdea japonica is also known as zhan she jian, dong bu diao cao, tie bian dan, and jiu jie lian. Rohdea japonica has the effects of clearing heat and detoxifying, strengthening the heart and promoting diuresis. Rohdea japonica is used for preventing and treating diphtheria, myocarditis caused by diphtheria, sore throat, bacillary dysentery, and heart failure from rheumatic heart disease.
Medicinal name: Rohdea japonica
Aliases: zhan she jian, dong bu diao cao, tie bian dan, jiu jie lian.
Meridian tropism: Bitter, slightly sweet, cold. Slightly toxic.
Efficacy: Clears heat and detoxifies, strengthens the heart and promotes diuresis.
Indications: Used for preventing and treating diphtheria, myocarditis caused by diphtheria, sore throat, bacillary dysentery, heart failure from rheumatic heart disease; external use for treating traumatic injuries, venomous snake bites, burns and scalds, mastitis, and carbuncles and boils.
Dosage and usage: Rhizome 15-25 g; leaves 5-10 g, external use in appropriate amount, mash and take the juice to apply to the affected area, or mash and apply to the affected area.
Source: Rohdea japonica is the plant Rohdea japonica of the Liliaceae family, Rohdea genus, used medicinally as the rhizome or the whole plant. In autumn, dig up the rhizome, wash it, remove the fibrous roots, and use it fresh or slice and dry it. The whole plant is used fresh, harvestable in all four seasons.
Source morphology: Perennial evergreen herb. Rhizome short and thick. Leaves basal, broadly strap-shaped, thickly leathery. In spring and summer, a dense spike inflorescence forms on the scape; the perianth is connate, spherical-bell-shaped, with six lobes, not very distinct, fleshy, pale yellow or brown; six stamens; ovary spherical, stigma three-lobed. Berry spherical, orange-red when ripe. Produced in China and Japan; commonly cultivated in southwestern, central, and eastern parts of China.
The sap of Rohdea japonica is toxic, generally with the stem tissue fluid being the most toxic. Generally, if the sticky liquid touches the hands or skin, it causes an allergic reaction, with patches or a very itchy sensation, and scratching inadvertently makes it itch more. Note that Rohdea japonica includes those of the Dieffenbachia genus and the Aglaonema genus, and the toxicity of these two varieties is different. If taken internally as a Chinese medicine, overdose by internal use causes nausea and vomiting, headache and dizziness, salivation and anorexia, blurred vision, and fatigue after about 1 hour; in more severe cases, abdominal pain and diarrhea, a sense of pressure in the precordial region, numbness of the limbs, coldness of the extremities, pale skin, blurred vision, slow heartbeat, and decreased blood pressure; in severe cases, the patient becomes restless, has convulsions, coma, and dilated pupils, and various arrhythmias may occur, such as premature ventricular beats, atrioventricular block, atrial or ventricular tachycardia, atrioventricular dissociation, atrial fibrillation, or sinus bradycardia, sinoatrial block, and junctional rhythm, etc.
Rescue methods: For rescue methods and precautions, refer to digitalis.
A potassium salt therapeutic diagnostic test can also be done: add 15-25 ml of 10% potassium chloride solution to 500 ml of 5% glucose solution, and under close cardiac observation, complete intravenous infusion within 2 hours. If the arrhythmia improves, it indicates poisoning by cardiac glycoside-containing drugs.
In addition, Chinese herbal medicine antidotes are as follows:
1. Ginseng 9 g, Ophiopogon 9 g, Schisandra 6 g, decoct twice, combine the decoctions, and take in 2 divided doses.
2. Strong tea with an appropriate amount of white sugar, drink frequently.
3. Licorice 15 g, mung bean 30 g, decoct and take in 2 divided doses.
Toxicity
The sap of Rohdea japonica is toxic, generally with the stem tissue fluid being the most toxic. Generally, if the sticky liquid touches the hands or skin, it causes an allergic reaction, with patches or a very itchy sensation, and scratching inadvertently makes it itch more. Note that Rohdea japonica includes those of the Dieffenbachia genus and the Aglaonema genus, and the toxicity of these two varieties is different. If taken internally as a Chinese medicine, overdose by internal use causes nausea and vomiting, headache and dizziness, salivation and anorexia, blurred vision, and fatigue after about 1 hour; in more severe cases, abdominal pain and diarrhea, a sense of pressure in the precordial region, numbness of the limbs, coldness of the extremities, pale skin, blurred vision, slow heartbeat, and decreased blood pressure; in severe cases, the patient becomes restless, has convulsions, coma, and dilated pupils, and various arrhythmias may occur, such as premature ventricular beats, atrioventricular block, atrial or ventricular tachycardia, atrioventricular dissociation, atrial fibrillation, or sinus bradycardia, sinoatrial block, and junctional rhythm, etc.
Rescue methods: For rescue methods and precautions, refer to digitalis.
A potassium salt therapeutic diagnostic test can also be done: add 15-25 ml of 10% potassium chloride solution to 500 ml of 5% glucose solution, and under close cardiac observation, complete intravenous infusion within 2 hours. If the arrhythmia improves, it indicates poisoning by cardiac glycoside-containing drugs.
In addition, Chinese herbal medicine antidotes are as follows:
1. Ginseng 9 g, Ophiopogon 9 g, Schisandra 6 g, decoct twice, combine the decoctions, and take in 2 divided doses.
2. Licorice 15 g, mung bean 30 g, decoct and take in 2 divided doses.
3. Strong tea with an appropriate amount of white sugar, drink frequently.
Landscape Uses of Rohdea japonica
Because the leaves of Rohdea japonica are broad and verdant, and the berries are bright red and round, it is very beautiful, and has always been a flower valued for both its foliage and its fruit.
Its leaf form is elegant and graceful, often placed on the long tables of studies and halls, or below long scrolls of calligraphy and painting; in autumn and winter, paired with red berries it adds even more color.
[Other uses] The rhizome and leaves can be used medicinally; see below for details.
[Brief cultivation history and culture] It has a long history of cultivation in China. Because its name and fruit color (red) are auspicious, it has often been used through the ages as a symbol of wealth, good fortune, peace, and longevity, and is deeply loved by people.
The Qing Dynasty's "Huajing" records: "People use its prosperity or decline to divine good or ill fortune; when building houses or moving residence, when sending betrothal gifts or managing ponds, when a child is first born, and for all happy occasions, it is always used."
The Flower Language of Rohdea japonica
The flower language of Rohdea japonica: health, longevity
Rohdea japonica is suitable for decorating living rooms and studies. Decorative applications: small potted seedlings can be placed on desks and windowsills for viewing. Medium-sized potted plants can be placed in living room corners or beside sofas as decoration, filling the room with natural vitality. It is known for its unique air-purifying ability: it can remove nicotine and formaldehyde. The higher the concentration of pollutants in the air, the more it can exert its purifying ability!
The Cultural Background of Rohdea japonica
1. "Huajing": Rohdea japonica, also called yun. Broad-leaved, clustering, deep green, not withering in winter or summer. Many households in Wu plant it, and use its prosperity or decline to divine good or ill fortune. When building houses or moving residence, when sending betrothal gifts or managing graves, when a child is first born, and for all happy occasions, it is always used, as an auspicious phrase; as for marriage betrothal gifts, even if the living plant is not taken, people must cut and make silk or satin in imitation of its form to substitute for it. It is also placed together with auspicious grass, scallion, and pine, four items in a pot, which is also a conventional practice. Planting method: at the spring and autumn equinoxes, divide and plant in pots, and place in a shaded spot. It is commonly said: the fourteenth of the fourth month is the birthday of the immortals; one should trim the old leaves and throw them on the thoroughfare for people to tread on, then the new leaves will surely grow abundantly. It likes being earthed up with fertile soil, and watered with cold tea.
2. "Gangmu Shiyi": In Zhejiang weddings, it is often used to accompany gift boxes, taking its meaning of being evergreen through the four seasons, with the meaning of eternal spring. {Note}: The medicinal Rohdea japonica also includes the congeneric plant Rohdea japonica (Thunb.) Roth var. variegata Hort., mostly cultivated.
Film Connection
"Léon: The Professional," as a film about noir and violence, has received both constant praise and controversy since its release. Amid the noir and violent themes and scenes, this pot of Rohdea japonica (Aglaonema 'Silver Queen') plays an important role in diluting the violence and making the visuals and even the content harmonious.
It is not hard to see that even as Léon roams everywhere and lives as a fugitive, he takes this Aglaonema 'Silver Queen' with him, and always likes to put it on the balcony after dawn and bring it back in after dusk. He treats the Aglaonema 'Silver Queen' as his best friend, carefully watering it and wiping the dust off its leaves, which more subtly expresses the other side of Léon as a serious killer - not lacking in love. And this better neutralizes the two elements of violence and love.
At the end, the female protagonist Mathilda takes Léon's pot of Aglaonema 'Silver Queen' out of the pot and plants it in a place that looks very sunny and warm, where people live in harmony. When Mathilda plants the flower, she does not shed tears, and does not fully express the feeling of losing Léon. She only says to herself, toward Léon's potted plant: I think we'll be okay here... Accompanied by positive emotions, this once again pushes the film to a moving climax.
The Role and Uses of Rohdea japonica: Feng Shui Effects
Rohdea japonica can remove harmful substances such as nicotine and formaldehyde. Growing Rohdea japonica creates a perfect living space for the living environment. From the perspective of feng shui, growing Rohdea japonica can make people healthy, full of energy and vigor, far from illness, injury, and disaster, and make the family happy and auspicious, and husband and wife loving and harmonious. To make good use of the feng shui effect of Rohdea japonica, note that placing it in the bedroom helps the owner establish a feng shui home and is conducive to the development of marital affection. Generally speaking, people born in the Year of the Rabbit and the Year of the Tiger are suitable for growing woody plants, and Rohdea japonica is the best choice.
Rohdea japonica Pictures