How to grow Ornithogalum caudatum and things to note
Obtaining seeds: First we need to obtain the seeds of Ornithogalum caudatum. We can select mature seeds from the outside of the rhizome of a mature plant; mature seeds grow to about the size of a coin. Planting and cultivation: Bury the seeds in flower soil, spray an appropriate amount of water, and after about a month the seedlings will break through the soil.
Obtaining seeds
First we need to obtain the seeds of Ornithogalum caudatum. We can select mature seeds from the outside of the rhizome of a mature plant; mature seeds grow to about the size of a coin.
Planting and cultivation
Bury the seeds in flower soil, spray an appropriate amount of water, and after about a month the seedlings will break through the soil. Ornithogalum caudatum likes sunlight and water, so it needs to be watered generously. During the growth of Ornithogalum caudatum, other offshoot plants will appear at its roots; these need to be cut off promptly before they grow large.
Fertilizer is one of the important elements affecting the growth of Ornithogalum caudatum. Fertilizing should follow the principle of "small amounts, frequent applications, balanced combination"; do not apply concentrated fertilizer or fertilizer skewed toward nitrogen, phosphorus or potassium.
Pruning and training
The flower spike of the Ornithogalum caudatum plant grows from its center; at this point it should not be repotted or earthed up. Water moderately plus give strong light. If the leaves grow too long, part of them can also be cut off. After the flowering period, the surface of the bulbous roots of Ornithogalum caudatum becomes raised; these are its seeds. Once they grow larger, peel them off and they can be planted again.
How to grow Ornithogalum caudatum
Ornithogalum caudatum, also called sea onion, is a perennial herbaceous plant of the genus Ornithogalum in the Liliaceae family. In the words of gardening enthusiasts, this fellow is very tough, so beginner growers need not worry about how to grow Ornithogalum caudatum; ordinary simple methods are enough.
1. Habits of Ornithogalum caudatum:
Ornithogalum caudatum likes sunlight and also tolerates partial shade; it is cold-tolerant, and in summer it fears direct sunlight; it likes a moist environment. After heavy frost in winter the leaf clusters still remain verdant green. The bulb has a habit of summer dormancy, the bulb has strong dividing ability, and the propagation rate is high.
2. How to plant Ornithogalum caudatum
Ornithogalum caudatum can be enjoyed not only for its leaves but also for its bulb, so when gardening enthusiasts plant Ornithogalum caudatum they leave about half of the bulb outside, so that the bulb can be appreciated, as shown below:
3. Common problems when growing Ornithogalum caudatum:
1) What to do if the leaves of Ornithogalum caudatum grow very long? At this point gardening enthusiasts can generously cut the leaves off according to their own preference; after a while new ones will grow.
2) If propagating small Ornithogalum caudatum, it will produce many small bulbs; at that point gardening enthusiasts can just divide the bulbs to propagate, very simple.
3) What soil to use for growing Ornithogalum caudatum? Soil with good air permeability and drainage is best, but it is not a must; I have seen Ornithogalum caudatum grown in garden soil, and it also grew very well.
4) Does Ornithogalum caudatum flower? Yes, it flowers, with small white flowers.
Ornithogalum caudatum Ornithogalum caudatum illustrated guide: how to grow Ornithogalum caudatum / how to propagate Ornithogalum caudatum
Ornithogalum caudatum profileOrnithogalum caudatum
How to grow Ornithogalum caudatum and things to note: an introduction to Ornithogalum caudatum
Ornithogalum caudatum, also known as sea onion and bird's milk flower, is a perennial herbaceous plant. Each time it grows a leaf, several small bulbils grow on the bulb's outer skin, shaped like tiger eyes, hence the name Ornithogalum caudatum (tiger-eye ornithogalum). Because its bulbous bulb resembles a gourd, it is also commonly called gourd orchid.
Morphological characteristics of Ornithogalum caudatum
Bulb ovoid, green, up to 10 cm in diameter. The plant is smooth, with stems about 25 cm tall. Leaves basal, linear, the same length as the stem, dark green, with a white sunken midrib. Leaves 5-6, strap-shaped or elongated-lanceolate, 30-60 cm long, 2.5-5 cm wide, apex caudate and often twisted, evergreen, nearly leathery. Scape 45-100 cm tall, often slightly curved; raceme 15-30 cm long, with numerous, densely packed flowers; bracts linear-narrowly lanceolate, green, quickly withering but not falling off; tepals oblong, about 8 mm long, white, with a green keel in the center; stamens slightly shorter than the tepals, the lower half of the filaments greatly enlarged. Several flowers form an open umbel, tepals separate, spreading, white on the front, green on the back, with white margins. Cultivated varieties include orange and double-flowered forms. Flowering period July-August; when grown indoors it can also bloom in winter. Flowering period March-May, sometimes also blooming in autumn. Fruiting period May-July. In the Northeast it is called "lanqi"; in the flower market some call it "sanqi" (notoginseng); to avoid confusion, it can be called "foreign sanqi".
The bulb is ovoid-spherical, green, with a membranous outer skin; when planting, the bulb is left entirely exposed above the soil surface. Leaves several, basal, sometimes slightly fleshy. Leaves evergreen, 5-6, with a long caudate tip at the end, leaf length 30-60 cm, width 3-5 cm. Leaves basal, nearly fleshy, strap-shaped, apex rolled inward into a tail shape. Scape stout, up to 1 m tall; raceme lengthening as it flowers, 20-30 cm long; flowers numerous and dense, often reaching 50-60, pedicels 2 cm, tepals 6, separate, white, persistent; with a green keel in the center, flower diameter 2-2.5 cm. Tepals about 1 cm long, white, with a green band in the center. Scape long or short; flowers numerous, arranged in terminal racemes or corymbs, with bracts; stamens 6, filaments flattened, enlarged at the base, anthers dorsifixed, dehiscing inward; ovary 2-3 locular, ovules numerous, style short cylindrical or filiform, stigma unlobed or shallowly 3-lobed. Capsule obovoid-spherical, with 3 ribs or 3 shallow lobes. Seeds few to numerous, with black seed coat. Flowering period winter and spring. Capsule obovoid-spherical: seeds small, black.
In addition, two other species are also cultivated in our country: O. umbellatum L., with shorter leaves, about 30 cm long, corymbose or umbellate inflorescence; O. arabicum L., with tepals lacking a green keel in the center, raceme, easy to identify. Both of these two species are native to the Mediterranean region.
Ecological habits of Ornithogalum caudatum
Ornithogalum caudatum is native to southern Africa. It likes sunlight and also tolerates partial shade; it is cold-tolerant, in summer it fears direct sunlight, and it likes a moist environment. After heavy frost in winter the leaf clusters still remain verdant green. It likes deep, humus-rich, loose, well-drained soil and an environment of partial shade in summer and ample light in winter. It is not cold-tolerant; in winter the greenhouse needs to be above 8°C. The bulb has a habit of summer dormancy, the bulb has strong dividing ability, and the propagation rate is high.
Distribution area of Ornithogalum caudatum
Native to South Africa; now cultivated in many countries around the world. Commonly grown in pots in North China for ornamental purposes.
Dietary therapy or medicinal value of Ornithogalum caudatum
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The medical content on Huahua Network is for reference only and cannot be regarded as professional advice. Any health problem should be consulted with professional medical personnel.
Medicinal information (1) Chemical constituents
The chemical constituents isolated and identified from this plant include: rhodexin A, B, OSW-1, steroidal saponins, convallatoxin, cholestane glycosides, baicalin and physcion, nonadecanol, eicosanol, docosanoic acid, β-sitosterol, daucosterol, hexacosanoic acid 1-glyceryl ester, catechol, p-ethoxybenzoic acid, p-coumaric acid, protocatechuic acid, ursolic acid, betulinic acid, fumaric acid, succinic acid, uracil, xanthine, quercetin, kaempferol, isorhamnetin, adenine nucleoside, daucosterol, stigmasterol 3-O-β-D-glucoside, quercetin 3-O-β-D-glucoside, kaempferol 3-O-β-D-glucoside, rutin, kaempferol 3-O-β-rutinoside, OSW-1, vincristine, etc. In addition, three new steroidal substances were isolated from the same plant; they are (25S,23S,24S)-spirost-?-ene-1β,3β,23,24-tetraol-1-O-α-L-rhamnopyranosyl-(1→2)[β-D-xylopyranosyl-(1→3)]-α-L-arabinopyranoside, a newly discovered compound named ornithogalum caudatum glycoside. The other two newly isolated known compounds are: hecogenin-3-O-{β-D-glucopyranosyl(1→2)-[β-D-xylopyranosyl-(1→3)]-β-D-glucopyranosyl(1→4)-β-D-galactopyranoside}; the third newly isolated known compound is β-sitosterol.
For detailed information see the literature: (1) Chemical constituents of Ornithogalum caudatum, Acta Pharmaceutica Sinica 2000, 35(1): 32-36; (2) Research on the chemical constituents of Ornithogalum caudatum (1), Chinese Traditional and Herbal Drugs, 1998, Vol. 29, No. 7.
Medicinal history
Ornithogalum caudatum is native to southern Africa. As early as the 1970s, Ornithogalum caudatum was introduced into China as an ornamental plant and trial-planted in Hainan, Xi'an and Changbai Mountain.
Especially in our south, it was grown only in a few areas such as Hainan and Zhongshan, and at that time it was generally owned by fishermen. It is said that every fishing boat that went out to sea kept a pot of Ornithogalum caudatum, said to bless safe voyages and smooth sailing. In the 1980s, on one accidental occasion, some fishermen had developed unnamed swellings and toxic sores, and there was no medicine on the boat, so they casually smeared the leaves of Ornithogalum caudatum on them, and as a result those swellings and sores disappeared very quickly. After coming ashore he went to a doctor for a check-up, and even the doctor was greatly astonished! Finding it incredible, from then on the function of Ornithogalum caudatum in treating unnamed swellings and toxic sores and reducing inflammation spread widely; that is, at the beginning the function of Ornithogalum caudatum was to treat swellings and toxic sores and reduce inflammation, and that is how it came about.
Only afterward did further research into treating hepatitis follow. In the 1990s, a Japanese scientist, Sashida, discovered further therapeutic functions of Ornithogalum caudatum and devoted himself to research on this new plant. After several experimental studies, he isolated from Ornithogalum caudatum a steroidal saponin compound with incredibly strong anti-cancer effects, ornithogalum caudatum saponin (abbreviated OSW-1). In bioactivity screening experiments, it was found that "OSW-1" has in vitro anti-cancer activity ten times or even a hundred times stronger than clinically used anti-cancer drugs such as paclitaxel, doxorubicin and camptothecin. Moreover, it is not toxic to normal cells. This astonishing discovery means that Ornithogalum caudatum could potentially replace drugs such as paclitaxel, doxorubicin and camptothecin.
In the late 1990s of the 21st century, the China Institute of Traditional Chinese Medicine lived up to expectations, basing itself on the research and development of Ornithogalum caudatum and further reaching the conclusion that "'Ornithogalum caudatum' contains large amounts of active medicinal ingredients such as alkaloids and flavonoids: its organic germanium content is twice that of ginseng, and its zinc and selenium are three times that of astragalus; organic germanium can directly destroy the formation of ribonucleic acid in tumor cells." The research and development results were verified by several research institutions including the Academy of Traditional Chinese Medicine and Materia Medica, and received high affirmation and recognition.
Many institutions in our country have conducted detailed research on Ornithogalum caudatum. In 1997, under the guidance of mentors Hui Yongzheng and researcher Yu Biao at the Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Dr. Deng Shaojiang and others were the first to artificially synthesize the anti-cancer active substance ornithogalum caudatum saponin, and synthesized more than 20 mg in one go. This not only made it possible to synthesize this anti-cancer substance in large quantities in the laboratory, but also showed that our country's scientists are at the forefront of the world in the field of artificially synthesizing anti-cancer substances.
At present, in order to get ahead of Japan, our country has accelerated the use of Ornithogalum caudatum as medicine, and finished capsule products are already circulating on the market.
Slice its leaves and the bulb below or cut them into pieces and steep them in liquor; this can relax muscles and invigorate blood circulation. Used internally and externally, it has a good restorative effect on bruises, sprains and excessive muscle fatigue.
The ancient Egyptian Ebers Papyrus (about 1500 BC) records the use of squill as a cardiotonic, a predecessor of digitalis treatment.
Efficacy and indications
The polysaccharide and saponin series of Ornithogalum caudatum (Ornithogalum caudatum Ait), from the angles of non-specific immunity, humoral immunity and cellular immunity, have immune-enhancing effects on the body and regulate immune responses.
Effects
Ornithogalum caudatum (Ornithogalum caudatum Ait) is often used among the people for anti-inflammatory disinfection and for treating liver disease, liver cancer and gallbladder inflammation. Cholestane glycosides and 22-homo-23-norcholestane glycosides with lymphocyte proliferation-inhibiting effects, baicalin and physcion, and abundant steroidal saponins have been isolated from plants of this genus.
Research shows that polysaccharide substances widely present in animal cell membranes and in the cell walls of plants and microorganisms can improve the body's immune function. They can not only promote the functions of immune cells such as T cells, B cells and MΦ cells, but also promote the production of cytokines. The saponin OSW-1 isolated from Ornithogalum caudatum has obvious anti-cancer activity against lung cancer and breast cancer. The in vitro anti-P338 lymphocytic leukemia activity results show that OSW-1 has 10-100 times the anti-cancer activity of common anti-cancer drugs camptothecin, doxorubicin and paclitaxel, and it has been successfully synthesized by Deng Shaojiang of the Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences.
In vitro tumor inhibition experiments with different components of Ornithogalum caudatum prove that the total saponins, total polysaccharides and total alkaloids of Ornithogalum caudatum all show varying degrees of inhibition of tumor cell growth. In the tumor inhibition experiment of Ornithogalum caudatum polysaccharides, experiments on mouse humoral immunity and cellular immunity, flow cytometry objectively tested changes in T lymphocyte subsets, and RT-PCR was used to detect the effect of the Ornithogalum caudatum polysaccharide series on the expression level of the cytokine IL-2 mRNA in cells. At the cellular and molecular levels, the Ornithogalum caudatum polysaccharide series showed enhanced immune regulatory effects, indicating that polysaccharide compounds mainly act through relatively strong regulation of immune function, thereby showing certain anti-aging, antiviral and anti-tumor effects.
Research shows that the Ornithogalum caudatum polysaccharide series, on the basis of promoting the non-specific immune activity of macrophage phagocytosis, enhances the ability of macrophages to process and present antigens and raises antibody levels. At the same time, the Ornithogalum caudatum polysaccharide series can also enhance the transformation of mouse T and B lymphocytes, increase NK cell cytotoxic activity, and promote mouse splenocytes to produce interleukin 2 (IL-2). IL-2 is an important regulatory factor that promotes the proliferation and differentiation of cytotoxic T cells (CTL) and natural killer (NK) cells. The Ornithogalum caudatum polysaccharide series can also promote the proliferation response and secretion of T cells, which helps enhance the tumor-killing effects of cytotoxic T cells and NK cells. T lymphocyte subsets are important factors constituting the body's immune defense system. Among T lymphocytes, the two main subsets are helper T cells CD4 and suppressor T cells CD8; the mutual changes and adjustments of these two types of cells can maintain immune balance in the body. CD4 has the activity of regulating immune responses, assists B cells in producing antibodies, and secretes cytokines, while CD8 has immunosuppressive and cytotoxic effects. The Ornithogalum caudatum polysaccharide series can, to varying degrees, raise CD3, CD4 and CD4/CD8 while lowering CD8, further confirming the enhancing effect of the Ornithogalum caudatum polysaccharide series on helper T cells (Th) and its lowering effect on suppressor T cells (Ts); it is speculated that helper T cells (Th) may be its main primary stimulating cells. Different concentrations of Ornithogalum caudatum polysaccharides can promote IL-2 mRNA expression to a certain extent, further confirming at the gene level the effect of the Ornithogalum caudatum polysaccharide series on IL-2 production, and it is inferred that the Ornithogalum caudatum polysaccharide series has the effect of promoting mouse immune function.
Landscape uses of Ornithogalum caudatum
Ornithogalum caudatum: each time it grows a leaf, several small bulbils grow on the bulb's outer skin, shaped like tiger eyes, hence the name Ornithogalum caudatum. Because its bulbous bulb resembles a gourd, it is also commonly called gourd orchid. Ornithogalum caudatum is tender green all year round, with a texture like agate and a translucent feel; placed indoors for viewing, it is refreshing and pleasing to the eye. Its leaves are quite distinctive: from the base to the tip they suddenly become as thin as needles, curving and drooping, draping around the edge of the pot and swaying with the wind, with a unique charm. Ornithogalum caudatum flowers from mid-April to early May; the flowers include white, orange and double-flowered types. In spring the star-shaped white flowers sparkle, 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 viewing.
It is a foliage plant for indoors and shaded balconies, appreciated for its large leaves and gray-green bulb; it is mostly grown in pots for viewing.
Propagation methods of Ornithogalum caudatum
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, wait several years until the bulbs become crowded before dividing them again.
Sowing propagation
Seedlings need 3-4 years of cultivation before they can flower. Cultivation is easy; after flowering, remove the residual flower stalks.
Bulb division propagation
The underground parts of some flowers include bulbs or corms, tubers, tuberous roots, etc. After these bulbs or corms, tubers, tuberous roots, etc. have grown underground for a year, small bulbs will grow around them; just divide these small bulbs and plant them. The operation is simple and management is convenient. Just note that when planting, do not plant the small bulbs too deep; usually the thickness of the covering soil should not exceed one times the bulb diameter.
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 flower even better the next year. The bulb storage temperature is 25°C, and it needs dry, ventilated conditions.
Cultivation techniques for Ornithogalum caudatum: potting and transplanting
When potting small seedlings, first place a 2-2 cm thick layer of coarse-grained substrate or clay pellets at the bottom of the pot as a drainage layer, sprinkle a layer of fully decomposed organic fertilizer on top as base fertilizer, about 1-2 cm thick, then cover with a layer of substrate about 1-2 cm thick, and then place the plant in, so as to separate the fertilizer from the root system and avoid burning the roots.
The substrate used for potting can be one of the following: peat + perlite + clay pellets = 2 parts + 2 parts + 1 part; peat + cinder + clay pellets = 2 parts + 2 parts + 1 part; sawdust + vermiculite + medium-coarse river sand = 2 parts + 2 parts + 1 part. After potting, water thoroughly once, and place it in a slightly shaded environment for a week of care.
When transplanting small seedlings, first dig the planting hole, sprinkle a layer of organic fertilizer at the bottom of the planting hole as bottom fertilizer (base fertilizer), about 4-6 cm thick, then cover with a layer of soil and place the seedling in, so as to separate the fertilizer from the root system and avoid burning the roots. After placing the seedling in, backfill the soil, cover the root system, and firm the soil with your foot, then water thoroughly once.
Humidity management
It likes a relatively dry air environment; if rainy days last too long, it is susceptible to infection by pathogens. It fears rain, and the leaves should be kept dry at night. The most suitable relative air humidity is 40-65%.
Temperature management
It likes a cool climate and fears intense heat; getting through summer is difficult. It is not tolerant of frost and cold; when the temperature drops below 10°C it enters dormancy. The most suitable growth temperature is 15-28°C.
Light management
In the three seasons of late autumn, winter and early spring, because the temperature is not very high, it should be given direct sunlight to help it carry out photosynthesis and form flower buds, flower and set seed. If high-temperature weather occurs or in summer, it needs to be shaded from about 50% of the sunlight. If it is kept indoors for viewing after flowering, place it near a southeast-facing door or window to extend the flowering period and increase the number of flowers as much as possible.
Fertilizer and water management
It does not have high requirements for fertilizer and water, and it also fears random fertilizing, concentrated fertilizer and one-sided application of nitrogen, phosphorus or potassium fertilizer. It should follow the fertilizing (watering) principle of "light fertilizer applied frequently, small amounts with many applications, complete nutrition": spring and autumn are the two seasons of its peak growth. Fertilizer and water management follows the cycle of "Huabao" - "Huabao" - clear water - "Huabao" - "Huabao" - clear water (at the very least, ensure two "Huabao" applications per week). The interval period is about: 1-4 days for outdoor care; 2-6 days for indoor care; shorter intervals on sunny days or during high temperatures, longer intervals or no watering on rainy days or during low temperatures.
Summer is the season of slow growth, so fertilizer and water should be appropriately controlled. Fertilizer and water management follows the cycle of "Huabao" - clear water - clear water - "Huabao" - clear water - clear water, the same as spring and autumn. Water when the temperature is low in the morning or evening, and also spray the plant frequently. Try to arrange watering time in the morning when the temperature is lower.
Winter is the dormant period; the main task is doing a good job of controlling fertilizer and water. Fertilizer and water management follows the cycle of "Huabao" - clear water - clear water - "Huabao" - clear water - clear water, with an interval of about 7-10 days; shorter intervals on sunny days or during high temperatures, longer intervals or no watering on rainy days or during low temperatures. Try to arrange watering time at noon on sunny days when the temperature is higher.
Shaping and pruning
1. Dwarfing the flower scape: the flower scape of Ornithogalum caudatum can reach up to ? meters tall, and the terminal raceme can have as many as dozens of small flowers; the gravity is great, and added to the slender, long flower scape, it easily becomes top-heavy and lodges, affecting the ornamental effect. Dwarfing methods include:
① Repeated carving of the flower scape: after the flower buds appear, use a small knife below to scrape the epidermis down to the upper end of the bulb, causing it to bend toward the wound; several days later, scrape off the epidermis on the opposite side below the wound, causing it to bend toward the new wound, forming an S-shaped curve. After it takes shape, scrape a third time on one side not yet carved, causing it to bend again toward the third carved part, and then carve below the newest wound to make it bend. After repeated scraping, the flower scape continuously bends forward, backward, left and right, and thus the plant is dwarfed.
② One-time scraping: when the flower scape is about 40 cm tall, scrape the flower scape all at once according to the above method. The wound can be longer, but it must be bound and fixed with wire or plastic tape, and the binding removed after the wound has healed and set.
2. Leaf modification: as the bulb grows, the leaves also lengthen. In order to make the plant compact and beautiful, the leaves must be modified. When modifying, cut the leaves shorter by about 2/3; the cut edges should be as varied and artistic as possible. The ends can be cut into oval or wedge shapes (horn shape, etc.) as needed, but they must not be cut flat. In this way the plant shape is compact, unusual and elegant.
3. Layout and shaping of the bulbs: when planting Ornithogalum caudatum, an odd number is preferable:
① Multi-plant planting: select ideal plants and plant them together in a purple clay pot; or in a pot with multiple bulbs, keep an odd number of ideal plants and remove the rest. As for the small plants sprouting at the front side, they can also be kept for a decorative effect; however, they must not obscure the main subject, that is, the 3 large bulbs at the back. Therefore cut off all the stems and leaves of these small plants. The small plant at the far right, because it does not obscure the main subject, can keep its stems and leaves, so that the shape is full of variation.
② Single-bulb shaping: choose a beautiful, thick, large bulb and plant it alone in a flower pot, strengthen fertilizer and water management, and make the bulb expand faster. Now the bulb diameter has reached 12 cm, while the pot opening is only 10 cm, which is very unusual and interesting. In order to highlight the bulb-viewing effect, all leaves more than 3 cm above the bulb can also be cut off. The next day new leaves will gradually grow from the cut edges, and after a week the leaves can grow 4 cm tall. In this way you can both enjoy the plump, crystal-clear bulb for a long time and observe the growth rate of the leaves, which has a special charm.
4. "Beauty treatment" of the bulb: due to metabolism, over time a reddish, shriveled film easily forms on the surface of Ornithogalum caudatum. As the bulb expands, this film naturally tears apart, reducing the ornamental effect, so this outer skin should be peeled off. The most prominent is a semicircular, semi-transparent small bulb near the root, which glitters golden in the sunlight and is shaped like a tiger's eye, hence the name. After peeling off the first layer of outer skin, "the old appearance takes on a new look": the bulb is emerald green, beautiful and elegant, called "face like jade".
Planting
In terms of planting, so far there are only a few bases. The Changbai Mountain planting base is very large; it organizes farmers to plant, and then a cooperative purchases the crop and sells it to pharmaceutical factories. The characteristic of planting in Changbai Mountain is that the soil is good and there is no need to specially cultivate the soil, but another characteristic is that in winter it will die off, because the north has perennial snow accumulation, which freezes the roots of Ornithogalum caudatum to death, causing the harvest ratio to be less than ideal. There is also a planting site in Zhejiang; due to research funding reasons, it was not planted further afterward. There is also a planting site in Guangdong, covering 50 mu, with dedicated researchers and dedicated cultivation. It has several characteristics: the soil must be specially cultivated, because the soil must contain large amounts of the trace element selenium, which is necessary for human cell metabolism. It is precisely by absorbing selenium from the soil that Ornithogalum caudatum greatly increases its anti-cancer activity, and compared with other plants, Ornithogalum caudatum seems especially strong at absorbing selenium; the trace element selenium content in each gram of dry product actually reaches 46.361 micrograms. There is also the problem of the rainy season in the south: the roots of Ornithogalum caudatum cannot have too much water for a long time, otherwise the result is the same as in Changbai Mountain. There is also the problem that southern temperatures are too high in summer, but there are still many ways to solve excessively high temperatures. Rumor has it that the state also plans to set aside a piece of land in Hainan Province for an Ornithogalum caudatum planting site. The Guangdong planting site is currently the most capable Ornithogalum caudatum planting site.
Disease control of Ornithogalum caudatum
Among diseases, there is harm from mosaic disease; the virus is spread by aphids, and it can be controlled by spraying with 2.5% rotenone extract at 800 times dilution.
Ornithogalum caudatum pictures