What diseases are prone to occur in cut-leaf asparagus fern?

The small branches of asparagus fern turn yellow but do not fall off, mainly caused by insufficient nutrients in the potting soil and malnutrition. Some cases are due to the potting soil being hard and compacted, poor aeration, and reduced root vitality. In addition to repotting in spring with organic-rich potting soil, the surface of the potting soil should be loosened frequently, and fertilization should be strengthened.

The leaf tips of asparagus fern turn yellow and withered or fall off, mainly caused by too little watering, the potting soil being too dry, or relatively low humidity. The potting soil should be kept moist at all times, and water should be sprayed on the plant frequently. The water temperature should preferably be the same as room temperature, and the asparagus fern should be placed in a location with high air humidity. During the growing season, mixed fertilizer should be applied appropriately to promote vigorous growth and enhance disease resistance.

The tips of asparagus fern branches turn dark yellow or yellow-green, caused by strong light exposure or overwatering. It should be moved to a shaded place to avoid direct strong light, and care should be taken not to water too much.

Asparagus fern roots rot and branch tips turn scorched yellow and fall off, mainly caused by exposure to strong winds in the hot summer season or long-term water accumulation in the pot. Therefore, special attention should be paid in summer to guard against thunderstorms or typhoons.

Common indoor plant cultivation methods

Key points of this article

Flower pots, watering cans, soil, fertilizer, flower scissors...

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I. Cultivation methods for Alocasia (has the effect of removing dust from the air, cannot be placed in the bedroom)

1. Temperature. Alocasia can only grow well in an environment not lower than 18°C. If the temperature is below 18°C, Alocasia will enter a dormant state and stop growing. 2. Fertilization. Alocasia likes fertilizer and should be fertilized monthly. 3. Watering. Alocasia needs more water in summer, but not excessively; it is suitable to alternate between dry and wet, and there should be no water accumulation in the soil, otherwise the tubers will rot. In winter it goes dormant, so water less and stop fertilizing. 4. Sunlight. Alocasia likes shade; do not let direct sunlight hit it. If Alocasia becomes "wilted," it is mainly due to insufficient fertilization, so pay attention to supplementary fertilizing. Care: Alocasia likes warm, humid environments with slight shade, but during the flowering period it needs ample sunlight, otherwise the spathe will have a green tint, affecting quality. It must receive 3-5 hours of light per day, otherwise the leaf stalks will elongate and affect ornamental value. Alocasia is not very cold-hardy and should be moved into a greenhouse in mid-October. In summer, under shaded conditions, it needs frequent water spraying to cool down and maintain humidity. Alocasia likes moist, fertile soil, which is what is commonly called "heavy fertilizer and heavy water"; during the growing period it needs more water.

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II. Cultivation methods for African jasmine (the volatile oils it produces have significant bactericidal effects. It can help people relax, aid sleep, and improve work efficiency)

1. Temperature. African jasmine grows well in warm climatic conditions, with an optimum growth temperature of 18°C to 32°C. When summer temperatures exceed 38°C, plant growth will be inhibited; in some areas of South China, ground-planted specimens can overwinter outdoors, while in areas north of the Yangtze River, potted plants require a greenhouse temperature of no less than 3°C to 5°C in winter. 2. Light. African jasmine likes sunlight, and its native environment is mostly semi-shaded. For ground planting as garden landscaping trees in South China, it is best to choose a location with lateral shade; for potted plants north of the Yangtze River, full sunlight can be received in spring and autumn, while in summer a shade frame should be set up, or the plant should be moved under the dense shade of large trees, at least avoiding direct sunlight for several hours around noon; particularly noteworthy is that from June to July, after prolonged rain followed by a clear day, when the temperature suddenly rises and the light is very intense, shade work must be done well to prevent young new shoots and tender leaves from being scorched. For potted plants in public places, relatively ample scattered light is required, or they should be placed near a window; they should not be placed in excessively dark locations, otherwise the leaves will lose their green color, turn yellow, or fall off. 3. Water. Whether ground-planted or potted, ample water is required, but water must not accumulate at the roots, otherwise root rot easily occurs. In spring and autumn, watering should be done to the extent of keeping the potting soil moist; during the plum rain season, be vigilant against water accumulation; in the scorching summer, spray water once in the morning and once in the afternoon to increase humidity and lower temperature; in winter, for indoor potted plants, it is suitable to keep the potting soil slightly moist, and around noon when the temperature is relatively higher, spray an appropriate amount of water on the leaves. In spring, summer, and autumn, under normal fertilization conditions, if the lower leaves of a potted plant turn yellow and fall off, it is very likely due to water accumulation and root rot, and the pot should be repotted and the soil changed promptly; in summer, if watering has been neglected and newly sprouted tender shoots wilt and droop, do not immediately pour large amounts of water on the potting soil, but first spray some water on the leaves, and after the leaves have slightly recovered, then water the potting soil with an appropriate amount. 4. Soil. In southern regions, the planting site should be loose, fertile, well-drained sandy loam. For northern potted plants, a mixture of 7 parts leaf mold, 1 part river sand, 1 part decomposed organic fertilizer, and 1 part fermented sawdust can be used. During the growing season, loosen the soil of potted plants once a month, always keeping the root area in a well-aerated state. In addition, potted plants can have their soil changed once every 1 to 2 years. 5. Fertilizer. Potted plants should be given a thin, decomposed oil cake fertilizer solution once a month during the growing season, and a phosphorus-potassium fertilizer once before flowering in May to promote blooming; after autumn, supplement with 1 to 2 more applications of phosphorus-potassium fertilizer for a safe winter. For potted plants in northern regions, to prevent leaf yellowing, add 0.2% ferrous sulfate when watering and fertilizing during the growing season. When ground planting, apply sufficient base fertilizer, and in late autumn dig trenches around the outer roots to bury oil cake fertilizer, 0.5 to 1 kg per plant;

Pest and disease control 1. Diseases ① Anthracnose mostly occurs on tender branches and leaves, with nearly circular to irregular depressed spots, brown edges, gray-white to gray-brown centers, and sparse small black dots on the surface, which are its acervuli. Control method: In the early stage of the disease, spray 50% carbendazim wettable powder at 800 times dilution plus 25% chlorothalonil wettable powder at 800 times dilution, or 25% carbendazim wettable powder at 500 times dilution, alternating sprays every 10 days, for 3 to 4 consecutive times. ② Sunscald disease: In the intense heat of midsummer, when shade frames are inadequate, the tender shoots and young leaves of potted African jasmine are prone to sunscald, manifested as gray-white or light-white scorch spots on the leaves. Control method: Use shade netting for shading, appropriately adjust the position; in high-temperature and drought seasons, appropriately increase the frequency and amount of watering, and if necessary, spray water on the leaves; for plants that have already suffered scorch damage, promptly move them under a shade shed, cut off the scorched tender shoots and young leaves, strengthen water and fertilizer management, and help the plant recover health as soon as possible. 2. Pests. African jasmine occasionally suffers from leaf-eating pests, such as Atractomorpha sinensis, causing numerous holes or notches on the leaves. Spray 90% trichlorfon crystal at 800 times dilution promptly to kill them.

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III. Cultivation methods for peace lily (suppresses waste gases exhaled by humans, such as ammonia and acetone. It can also filter benzene, trichloroethylene, and formaldehyde from the air. Its high transpiration rate can prevent nasal mucous membranes from drying out, greatly reducing the likelihood of illness) Peace lily is an "expert" at suppressing waste gases exhaled by humans such as ammonia and acetone. It can also filter benzene, trichloroethylene, and formaldehyde from the air. Its high transpiration rate can prevent nasal mucous membranes from drying out, greatly reducing the likelihood of illness. This beautiful indoor plant, native to the tropical rainforests of Venezuela, is undoubtedly a miracle of medicinal biology. Below are illustrations. Light conditions: Neutral plant, suitable for planting in semi-shaded areas. Care required: Keep the potting soil moist and fertilize regularly; leaves need frequent water spraying. Suitable temperature: Optimum growth temperature is 20-28°C, overwintering temperature is 10°C. Can remove: ammonia, acetone, benzene, trichloroethylene, formaldehyde.

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IV. Cultivation methods for silver queen (known for its unique air purification ability: the higher the concentration of pollutants in the air, the more it can exert its purification ability! Therefore, it is very suitable for dark rooms with poor ventilation.) This plant with gray-white leaves likes to live in a constant-temperature environment. If watered with warm water, it can survive for a longer time. ★Suitable temperature: 16-21 °C ★Can remove nicotine, formaldehyde

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V. Cultivation methods for maidenhair fern (can absorb approximately 20 micrograms of formaldehyde per hour, and is therefore considered the most effective biological "purifier." Those who work with paint and coatings all day, or who have smokers around them, should place at least one fern in the workplace. In addition, it can also suppress xylene and toluene released from computer monitors and printers.) Maidenhair fern likes loose, permeable, fertile calcareous sandy loam. For potting, the growing medium can be made by mixing equal parts of loam, leaf mold, and river sand. During the growing period, apply liquid fertilizer once a week, and take care to keep the potting soil moist and the air humidity relatively high. In dry seasons, water can be sprinkled on the ground around the plant frequently to increase air humidity. Maidenhair fern likes bright, scattered light and dislikes direct sunlight. If the light is too strong, the leaves will turn yellow and withered, or even die. It likes warmth and is also cold-tolerant, with an optimum growth temperature of 13-22°C, and a winter overwintering temperature of 5°C. Among ferns, maidenhair fern is one of the most widely cultivated species. Its stems and leaves are elegant and varied, with graceful forms and a compact plant type, extremely suitable for small pot cultivation and for accenting rock bonsai. Because the black leaf stalks are slender and glossy, closely resembling human hair, and its texture is very soft and beautiful, like a young girl's soft hair, it is also called "maiden's hair"; its light green thin leaves paired with jet-black glossy leaf stalks appear especially elegant and graceful. It likes shade, has strong adaptability, is easy to cultivate, and is more suitable for year-round indoor pot cultivation and viewing. As a small potted shade-loving foliage plant, it is superior to asparagus fern in many respects. Small pots can be placed on desks and coffee tables; larger pots can be used to decorate windowsills, corridors, or living rooms in shaded rooms, providing long-term appreciation. Maidenhair fern leaves are also good cut-foliage material and dried flower material.

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VI. Cultivation methods for schefflera (brings fresh air to smoking households. The leaves can absorb nicotine and other harmful substances from smoke-filled air, and through photosynthesis convert them into harmless substances of the plant's own. In addition, it can reduce formaldehyde concentration by approximately 9 milligrams per hour) Likes semi-shade, and can be enjoyed for a relatively long time in a bright and well-ventilated home. If indoors it receives about 4 hours of direct light per day, it can grow well. For varieties with yellow and white variegation, if the light is too weak or nitrogen fertilizer is applied excessively, the variegation will become blurred, thus losing its original characteristics. Optimum growth temperature is 15-25°C. The minimum winter temperature should not be lower than 5°C, otherwise leaf drop will occur. New leaves will appear the following spring. It grows well in environments with high air humidity and sufficient soil moisture, but has strong adaptability to the dry climate of the north. Note that the potting soil must not lack water, otherwise a large number of leaves will fall off. Under low winter temperatures, watering should be appropriately controlled. During the growing season, apply liquid fertilizer once every 1-2 weeks. Repot once every spring; if using plastic containers, pay attention to drainage. The potting soil is prepared with peat soil, leaf mold, perlite, and a small amount of base fertilizer. Fine sandy soil can also be used for potting. Pruning does not require major pruning. If the lower leaves have all fallen off and it has become a bare stem, cut back from the upper half to encourage new branch growth. The cut branches can also be used for cuttings, and after rooting they will become new plants. If you do not want the schefflera to grow too tall, you can pinch it when it reaches 30 cm, that is, remove the terminal bud by pinching off the top bud, and after some time lateral branches will grow.

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VII. Cultivation methods for spider plant (can absorb 95% of carbon monoxide and 85% of formaldehyde from the air.) Substrate: Spider plant has strong adaptability to various soils and is easy to cultivate. Fertile sandy loam, humus soil, peat soil, or fine sandy soil with a small amount of base fertilizer can be used as potting soil. Propagation: Usually propagated by division. Except in winter when temperatures are too low for division, it can be done in other seasons. Small plantlets with roots on the flower stems can also be cut and potted. Watering: Spider plant likes moist environments, and the potting soil should be kept moist regularly. However, the fleshy roots of spider plant can store large amounts of water, so it has strong drought resistance and will not dry out and die even if not watered for several days. In winter when temperatures are below 5°C, water less, and do not let the potting soil become too wet, otherwise the leaves will easily turn yellow. Fertilizing: Apply liquid fertilizer once every two weeks during the growing season. Variegated varieties should receive less nitrogen fertilizer, otherwise the white or yellow markings on the leaves will become less distinct. Stop fertilizing when the ambient temperature is below 4°C. Light: Spider plant likes semi-shaded environments and can be cultivated year-round in bright indoor conditions. Spider plants cultivated outdoors can also grow well under strong direct sunlight in summer. However, spider plants cultivated indoors for a long time should avoid direct strong sunlight and need 50-70% shading. Temperature: Spider plant is heat-tolerant. The suitable temperature is above 15°C, and the winter overwintering temperature is above 4°C. Humidity: Likes moist environments. To keep spider plant fresh and green, water can be sprayed on the leaves frequently for cleaning. Pruning: Remove yellow leaves at any time. Repot once every March, cutting off old roots, rotten roots, and excess fibrous roots. In early to mid-May, cut off some old leaves of the spider plant to encourage more new leaves and small plantlets to grow. Hydroponics: Spider plant can be grown hydroponically. Take the potted spider plant out of the pot, wash the soil off with water, cut off old leaves and old roots, place in a hydroponic container, and add clean water. Do not add too much water; just enough to reach the root crown is appropriate. For vigorous growth, add a few drops of nutrient solution (can be homemade) to the water. The container can be a wide-mouth glass bottle, glass cup, or other container. The water in the container can be changed every few days, or simply topped up with some water.

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VIII. Cultivation methods for aloe (one pot of aloe is equivalent to nine biological air purifiers) Home potted aloe can not only beautify the living space, but also be harvested at any time to obtain the freshest aloe leaves for home health care. Some say that growing a few pots of aloe at home is like having a resident "private doctor." This saying, while somewhat exaggerated, is not entirely unreasonable. Whether aloe is used as medicine for treating illness or for beauty and skincare, only fresh aloe can achieve the best results. 1. Preparation of potting soil There are various formulas for preparing aloe potting substrate. A common formula uses humus soil, garden soil, and river sand in a ratio of 4:4:2. Practice has proven that this substrate preparation is relatively suitable. Using sawdust instead of river sand reduces the weight of the substrate, increases aeration and water permeability, and can achieve good results. Sawdust from hard miscellaneous wood is preferable, and it should be piled up for fermentation before use. 2. Disinfection of potting soil For potting soil used for indoor aloe cultivation, it is best to disinfect before use to kill possible insect eggs and pathogens in the substrate. Common methods include soil burning disinfection, steam disinfection, and chemical disinfection. (1) Soil burning disinfection: Place the prepared mixed substrate on a stove with an iron plate and heat while stirring. Generally, at 80°C for 30 minutes, harmful microorganisms and various insect eggs in the substrate can be killed. (2) Steam disinfection: Place the prepared substrate in a container and steam thoroughly. Generally, household coal stoves and gas stoves can be used for heating and disinfection. Steam disinfection should be maintained above 80°C, and steaming for 2 hours can achieve thorough disinfection. (3) Chemical disinfection: Commonly use 40% formalin, apply 400-500 milliliters of solution per cubic meter of culture substrate evenly over the substrate, seal and cover flat with plastic film, leave for 1-2 days, then open, air and dry for 2-3 days, and pot after the solution has evaporated. 3. Potting and repotting The process of planting cultivated aloe in a flower pot is called potting. Potting time: should be done in spring and summer. Indoor temperatures of 15-28°C are relatively suitable. Potting method: Selecting seedlings before potting is an important key. Healthy aloe seedlings have short, thick leaves, dark green color, and more than 4 self-generated roots. When potting, first place some broken tiles at the bottom of the pot to facilitate drainage and aeration, then fill in some prepared substrate, place the aloe in the pot, spread the roots as much as possible, cover the roots with soil, then gently lift the seedling upward and press slightly to make the roots closely contact the substrate in all directions, then fill the potting soil to about 2 cm from the pot rim. Finally, slowly pour water through the pot until it drains, and potting is complete. After potting, do not water too much; generally water only when dry, and water thoroughly when dry. Frequently spraying water on aloe leaves can accelerate the greening and rooting of aloe. Newly potted aloe should not be exposed to direct sunlight and can be maintained in semi-shade. Repotting: Home potted aloe generally needs repotting once every 1-2 years. Spring is also preferable for repotting. When repotting, correct unpoting technique must be mastered. Turn the potted plant upside down, support the potting soil with the left hand, and strike the pot rim sharply with the right palm several times; after a few strikes, the pot and old potting soil will naturally separate. Then move the aloe together with the soil ball into a larger new pot, add new potting soil around the edges, then press the potting soil firmly with your hands, and water thoroughly. After repotting, it should be kept in semi-shade for a period of time, and moved to a sunny location only after fully recovering. 4. Management and care The management of home potted aloe mainly includes three aspects: fertilizing, watering, and winter insulation. Fertilizing: During the growth process, aloe needs large amounts of elements including carbon, hydrogen, oxygen, nitrogen, phosphorus, potassium, sulfur, calcium, magnesium, iron, etc. Among these, carbon, hydrogen, and oxygen come from the air, while other elements are absorbed from the potting substrate. In addition, it needs boron, manganese, molybdenum, zinc, copper, chlorine, and other elements. Although the required amounts are small, they cannot be replaced by other elements. Scientific fertilization can supplement nutrition. Watering: In winter, generally water once every 15-20 days; if needed, spray water on the leaves. Water as little as possible and keep the potting soil dry, which is beneficial for the plant to overwinter safely; in spring, generally water once every 5-7 days. Water only when dry, and water thoroughly when watering; the potting soil should alternate between dry and moist; in summer, temperatures are higher and evaporation is greater, so water once every 2-3 days, and in addition, spray water on aloe leaves in the morning and evening each day. Also note to reduce exposure to intense sunlight to reduce water loss; in autumn, the watering method for aloe is basically similar to spring, keeping the potting soil alternating between dry and wet. Watering time is generally best in the early morning and evening, when the water temperature is closer to the potting soil temperature, which can avoid drastic temperature changes in the potting soil affecting root growth. Remember: "For potted aloe, better dry than wet." 5. Overwintering management (1) Temperature requirements: Aloe can safely overwinter naturally in the tropical regions of southern China and frost-free areas year-round, such as southern Fujian, the coastal areas of Guangdong, and Hainan; in other areas, overwintering and freeze protection management must be strengthened. 5°C is the minimum safe temperature line for aloe overwintering. Mastering the safe overwintering temperature for aloe is one of the key techniques for the success of home potted aloe. (2) Methods for increasing and maintaining temperature: In areas where winter is not very cold or where indoor heating is available, moving potted aloe indoors generally allows for safe overwintering. When the temperature cannot be guaranteed to be above 5°C, corresponding warming measures must be taken. For example, dig rectangular pits (commonly called ground pits), make a simple insulation box, etc. (3) Control watering and increase light: In winter, water as little as possible or not at all, keeping the potting soil dry. If the air is too dry, the method of spraying water on the leaves can be used. In addition, let potted aloe receive as much sunlight as possible.

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IX. Cultivation methods for Monstera deliciosa (absorbs carbon dioxide at night, improving air quality) 1) Soil and repotting. Monstera deliciosa cuttings root, and when transplanting and potting, fertile pond mud or black mountain soil can be used. Because it grows rapidly, it needs repotting once a year. Repotting time is best done between March and April. When repotting, remove some old soil and dead roots, and switch to a pot one size larger. Place some hoof pieces, crushed bones, etc. at the bottom of the pot as base fertilizer, and fill in a growing medium prepared by mixing leaf mold, vegetable garden soil, and sandy soil in equal parts of 1/3 each. (2) Note the growing environment. Monstera deliciosa dislikes direct sunlight and is not cold-tolerant. In midsummer, it should be placed indoors or under a shade shed, and cannot be placed on a balcony with excessively strong sunlight, otherwise it will easily cause leaf scorch and affect ornamental value. When winter temperatures drop to 6°C, it should be moved indoors for warmth. 3) Keep the potting soil moist. Monstera deliciosa likes moisture and needs ample water during the growing period. For daily watering, once a day is fine; in summer, once in the morning and once in the evening; in dry weather, it is even more necessary to spray water on the leaves and sprinkle water in the growing environment to maintain air humidity and keep the leaves bright. In winter, water once every 3-4 days. Every 7-10 days, spray the leaves once with clean water close to room temperature to keep the plant evergreen and fresh, enhancing ornamental value. (4) Fertilize appropriately. Monstera deliciosa is a relatively fertilizer-loving flowering plant. From April to September, apply a thin oil cake fertilizer solution once every 15 days; decomposed human urine diluted with water can also be applied thinly; with sufficient fertilizer, the leaf color will be pleasing. In addition, for newly planted growing specimens, set up supports and tie them promptly; after the shape is established, pay attention to trimming the whole plant to strive for a beautiful plant shape. Let me also tell you a few pest prevention methods, listen carefully! The main pests and diseases harming Monstera deliciosa are scale insects and gray leaf spot disease. (1) Scale insects. When cultivating Monstera deliciosa indoors, if ventilation is poor, scale insects easily appear on stems and leaves, losing ornamental value. When occurring in small numbers, manual capture can be used; when severe, spray 40% omethoate emulsion at 1000 times dilution to kill them. (2) Monstera deliciosa gray leaf spot disease. It mostly starts from damaged areas at the leaf edges. Onset is more severe after low temperatures, smoke exposure, or pest damage. After infection, the lesions initially appear as black spots, and after expanding become elliptical or irregular. The edges are dark brown and the interior is gray-brown. Control methods: ① Strengthen plant care, remove pests promptly, and cut off some diseased leaves. ② When the disease occurs, spray 70% thiophanate at 1000 times dilution or 0.5 Bordeaux mixture.

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X. Cultivation methods for ivy (the champion of formaldehyde absorption) Just water it when it is dry. Master the principle of not watering when not dry and watering thoroughly when watering, and you can grow it well. Ivy can also be grown in water; you can add some nutrient water and grow it in a vase, which is both hygienic and beautiful. Try it now!

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XI. Cultivation methods for rubber tree (an all-rounder for eliminating harmful substances) The rubber tree grows relatively fast! ① Light. Apart from appropriate shading in summer (30-50%), it is best to provide ample light at other times. ② Temperature. The rubber tree likes high temperatures, with a suitable temperature between 20-32°C, and it must not go below 10°C. ③ Humidity. A high-humidity environment is beneficial for growth and will also produce aerial roots, so in addition to normal watering, it is also necessary to spray water frequently. Of course, it is best if the growing environment has 75-95% humidity. ④ Watering. Do not water too frequently; it is best to water thoroughly after the surface soil dries. Also, do not allow long-term drought or water only the surface soil. ⑤ Fertilizing. Compound fertilizer with nitrogen as the main component is sufficient; either hole application or pouring fertilizer solution is fine, but fertilizing must be done when the ambient temperature is between 18-30°C. ⑥ Pruning. Actually, this step is only to make the plant shape fuller or control growth; instead, it will affect it growing larger! ⑦ Pest and disease control. Under normal care, there are few pests and diseases. Only when maintaining indoors in winter will red spider mites and scale insects appear. Specialized pesticides can be sprayed for control, such as dicofol (red spider mites) and methidathion (scale insects).

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XII. Cultivation methods for asparagus fern (a protective umbrella that eliminates bacteria and viruses) Asparagus fern, also known as cloud-leaf bamboo, is a perennial evergreen climbing plant in the Liliaceae family, Asparagus genus. Native to southern Africa. Ecological habits: Asparagus fern is not cold-tolerant, not drought-tolerant, and likes warm, semi-shaded environments; it dislikes frost. Asparagus fern has strict requirements for potting soil: it should be loose, fertile, well-drained, and well-aerated, and the potting soil is best neutral. It can be prepared with leaf mold, sand, and decomposed fertilizer. Asparagus fern is not cold-tolerant and also fears heat; the optimum growth temperature is between 15-25°C. It can neither withstand direct light exposure nor stay in shaded areas for too long. Watering should not be excessive; master the watering principle of watering when dry and stopping when wet. Fertilizing once a month can meet growth needs. One- to two-year-old asparagus fern has the greatest ornamental value. Three-year-old asparagus fern begins to produce climbing stems, and supports should be set up for them to climb. If you do not want to set up supports, you can also cut off the climbing branches at the base. Asparagus fern is not cold-tolerant; the overwintering temperature is 10°C.

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Common problems in home flower growing:

1. Why do the tender leaves of asparagus fern turn scorched black at the tips when they grow to a certain height, while branches and leaves can still grow from the sides? The main reasons for the scorched tips of asparagus fern tender leaves are dry potting soil, insufficient fertilizer, or fertilizer burn. In addition, asparagus fern is originally a climbing plant, and when it grows tall it must have a support or rope for it to climb up; otherwise, because the top tip bends and droops, affecting the supply of water and nutrients, similar conditions can also occur. 2. What diseases is asparagus fern prone to? How should they be prevented and controlled? ① The small branches of asparagus fern turn yellow but do not fall off, mainly caused by insufficient nutrients in the potting soil and malnutrition. Some cases are due to the potting soil being hard and compacted, poor aeration, and reduced root vitality, affecting normal plant growth. In addition to repotting in spring with organic-rich potting soil, the surface of the potting soil should be loosened frequently, and fertilization should be strengthened. ② The leaf tips of asparagus fern turn yellow and withered or fall off, mainly caused by too little watering, the potting soil being too dry, or relatively low humidity. The potting soil should be kept moist at all times, and water should be sprayed on the plant frequently. The water temperature should preferably be the same as room temperature, and the asparagus fern should be placed in a location with high air humidity. During the growing season, mixed fertilizer should be applied appropriately to promote vigorous growth and enhance disease resistance. ③ The tips of asparagus fern branches turn dark yellow or yellow-green, caused by strong light exposure or overwatering. It should be moved to a shaded place or a windowsill with curtains to avoid direct strong light, and care should be taken not to water too much. ④ Asparagus fern roots rot and branch tips turn scorched yellow and fall off, mainly caused by exposure to strong winds in the hot summer season or long-term water accumulation in the pot. Therefore, special attention should be paid in summer to guard against thunderstorms or typhoons. 3. Causes and control methods for yellowing branches and leaves of potted asparagus fern? a) Light too strong. Asparagus fern likes semi-shade and dislikes strong light. In summer, if it is placed in direct sunlight, it will cause branches and leaves to turn yellow and withered. Once this happens, the flower pot should be moved to a cool place, and water should be sprayed on the branches and leaves frequently to increase relative humidity; those not severely damaged can mostly recover. b) Improper watering. Although asparagus fern likes moisture, it is very afraid of water accumulation in the pot. Too much water easily causes root rot, and too little water easily dries out leaf tips. If root rot occurs, watering should be controlled and the soil loosened frequently. For those with dry leaf tips, it is best to water a small amount first, then gradually increase, while spraying water on the branches and leaves. c) Insufficient nutrients. Asparagus fern likes fertile soil. If the soil is not changed and fertilizer not added for a long time, nutrients will be in short supply, and branches and leaves will turn yellow. At this time, apply a thin liquid fertilizer once a week, and water and loosen the soil promptly. d) Improper fertilizing. If the concentration of supplementary fertilizer is too high or undecomposed fertilizer is applied, it can easily cause fertilizer burn, leading to leaf drying and falling. Once fertilizer burn occurs, take the pot out, remove the fertilizer, then rinse the soil ball with clean water, and replace with new growing medium. e) Poor winter management. Asparagus fern likes warmth and should face the sun in winter. If it is placed in a location with insufficient light for a long time at this time, combined with poor ventilation and cold, it can easily cause branches and leaves to turn yellow and withered. At this time, it should be moved to a warm, sunny place, and watering should be appropriately controlled, and it can gradually recover to normal. f) Pest or disease infection. Once asparagus fern is infected with pests such as scale insects, it can also cause branches and leaves to turn yellow and withered, and should be controlled promptly.

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XIII. Cultivation methods for broadleaf lady palm (eliminates heavy metal pollution and carbon dioxide) Broadleaf lady palm, also known as Guanyin bamboo, Jintou bamboo, palm bamboo, and dwarf lady palm, is an evergreen foliage plant in the Arecaceae family, Rhapis genus. Broadleaf lady palm is a clumping shrub with upright stems, 1-3 m tall. The stems are slender like fingers, unbranched, with leaf nodes, wrapped in leaf sheaths with brown reticulate fibers. Leaves are clustered at the top of the stems, palmate, deeply cleft almost to the base, with 3-12 segments, 20-25 cm long and 1-2 cm wide; leaf stalks are slender, about 8-20 cm. The spadix is axillary, with small, pale yellow flowers, very numerous, unisexual, dioecious. Flowering period is April-May. Berries are spherical, seeds spherical. Broadleaf lady palm is native to Guangdong, Yunnan, and other places in China, and is also found in Japan. There are more than 20 species in the same genus, mainly distributed in Southeast Asia. It often grows in shaded, moist thickets on hillsides and beside ditches. Cultivated types include large-leaf, medium-leaf, and fine-leaf broadleaf lady palm, as well as variegated broadleaf lady palm. It likes warm, humid, semi-shaded, and well-ventilated environments, fears intense sunlight, and is slightly cold-tolerant, able to withstand low temperatures around 0°C. Broadleaf lady palm can be propagated by seeding and division; home cultivation mostly uses division. For seeding, use loose, permeable soil as the substrate, generally a mix of leaf mold and river sand. Before sowing, seeds can be treated by soaking in warm water (soak in 30-35°C warm water for two days), and sown when the seeds begin to germinate. Because germination is generally uneven, cover with soil slightly deeper after sowing. Generally, germination occurs 1-2 months after sowing, with a germination rate of about 80%. When the cotyledons of the seedlings reach 8-10 cm, they can be transplanted. It is worth noting that when transplanting, 3-5 plants must be planted per clump to facilitate survival and growth. Division propagation is generally done in spring when repotting; use a sharp knife to divide the original clump with many tillers into several clumps, minimizing root damage and avoiding bud damage during division, so that each clump contains more than 8-10 plants, otherwise growth will be slow and the ornamental effect poor. After dividing and potting, place in semi-shade, keep moist, and frequently spray water on the leaves to prevent leaf yellowing. After new branches sprout, move to a sunny place for care, then carry out normal management. For potted broadleaf lady palm, a mix of equal parts leaf mold, garden soil, and river sand can be used as the substrate, and an appropriate amount of base fertilizer can be added when planting. During the vigorous growing period from May to September, apply liquid fertilizer 1-2 times a month; the potting soil should be kept moist, better wet than dry, but water must not accumulate, otherwise root rot easily occurs. In autumn and winter, appropriately reduce watering. During the growing season, shade is needed, especially in summer when intense sunlight must be avoided, otherwise the leaves will turn yellow and the plant will grow slowly and stay short; generally maintain about 50% shading. Broadleaf lady palm requires a well-ventilated environment; poor ventilation easily leads to scale insects. If a small number occur, remove them manually promptly, and use 800 times omethoate solution for control, while also paying attention to ventilation and timely pruning of dead branches and fallen leaves. Broadleaf lady palm has a compact and elegant plant shape, upright clumps, delicate leaf shapes, and dark green glossy leaves. It has both a tropical charm and the elegance of bamboo, and is an important indoor foliage plant. It is very shade-tolerant, suitable both as small and medium potted plants for general household indoor display and appreciation, and as large potted plants for indoor arrangement in large buildings. It is one of the large indoor foliage plants. It can be enjoyed for a long time in a bright room, and can be enjoyed continuously for 3-4 weeks in a darker room. 2. Hydroponic method for broadleaf lady palm Arecaceae, Rhapis genus, also known as Guanyin bamboo. Native to Guangdong, Guangxi, Hainan, Yunnan, and other places. Characteristics Evergreen clumping shrub. Stems cylindrical, unbranched, with nodes like bamboo, covered with brown coarse fibrous leaf sheaths, like palm. Leaves clustered at the top of stems, leathery, dark green and glossy, palmate deep cleft, with 4-10 segments. Dioecious. Habits Likes warm, shaded, moist, and well-ventilated environments. The suitable growth temperature is 20-30°C, and in winter it should be kept above 4°C, able to withstand short-term low temperatures around 0°C. Propagation Generally done by division combined with repotting. Choose large, dense clumps; first take the plant out of the pot, then use a sharp knife to divide the clump into several clumps, minimizing root cutting during division, and keeping each divided plant with a certain plant shape, then repot, water thoroughly, and place in a semi-shaded, moist location, frequently spraying water on the leaves, and after growth resumes, normal care can begin. Seeds are sown in pots as soon as they mature in autumn, moved into a greenhouse in winter, and seedlings emerge the following spring. Key points for hydroponic care 1: Shade-tolerant, but when light is too weak it easily produces yellow leaves; when ventilation is poor, parasites breed. 2: During the growing period, water should be sprayed on the leaves frequently. Method for obtaining hydroponic material Best to wash roots from potted plants. Broadleaf lady palm roots are relatively hard in texture and not easy to rot after hydroponics, but new roots sprout slowly, taking as long as a month and a half.

Precautions

Pay attention to indoor temperature!

Plant cultivation

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