How to grow string of pearls? A detailed guide to care methods
String of pearls (Curio rowleyanus) likes a warm, humid, and semi-shaded environment, has strong adaptability, and is relatively drought-tolerant and cold-tolerant. It prefers soil rich in organic matter that is loose and fertile. It grows best in a warm environment with high air humidity and strong diffused light. It is not picky about soil and grows better in loose sandy loam. It is generally suitable for growing under moderate light conditions and also tolerates weak light. The optimum growth temperature is 15—25°C, and the overwintering temperature is 5°C.
Soil for growing string of pearls
For potted string of pearls, a common substrate is leaf mold or peat soil, garden soil, and river sand mixed in equal parts with a small amount of base fertilizer added. Repot once every 2—3 years and remix the growing medium. Its fleshy roots have well-developed water-storing tissue and strong drought resistance, but during the peak growth period from March to September it needs a relatively large amount of water, so it should be watered and misted frequently; after autumn, gradually reduce watering to improve the plant's cold resistance. During the peak growth period, apply dilute liquid fertilizer twice a month. Fertilizer should be mainly nitrogen-based, but varieties with golden centers and golden edges should not be given excessive nitrogen fertilizer, otherwise the linear markings on the leaves will become less obvious. Spider plant is not prone to pests and diseases, but if the potted soil is waterlogged and ventilation is poor, in addition to causing root rot, root rot disease may also occur, so attention should be paid to spraying pesticides for control.
Propagation methods for string of pearls
It can be propagated by cuttings. The stems and vines very easily produce aerial roots. In spring and autumn, cut several segments, bury half of them in sand or loose soil, and keep them moist but not waterlogged; they will soon take root for planting (about half a month in spring and autumn, while rooting is difficult in winter and summer. When the potted plant is not uniform and full enough but has grown too long, this measure can be used to compensate.) Spider plant can be propagated by division. Except in winter when the temperature is too low and unsuitable for division, it can be done in other seasons. For plants potted for 2—3 years, when repotting in spring, remove the old growing medium from the dense clump of seedlings, divide them into two to several clumps, and pot them separately as new plants. Spider plant can also be propagated using small plantlets on the runners. During the growing season, cut off the small plantlets on the runners and plant them in growing medium or water; after the small plantlets have rooted, transplant them into pots. In addition, it can also be propagated by seed, but this is generally seldom used.
Care management for string of pearls
During cultivation, watering should favor dryness over moisture. When the weather is dry, spray water on the leaves and vines more often to make up for the lack of water and keep the beads green and plump. Avoid shade, and avoid high temperature and high humidity. It prefers semi-shade; exposure to strong sun may scorch the beads, while too weak light will result in poor growth.
String of pearls is mainly harmed by: snails, aphids, cottony cushion scale, sooty mold, and stem rot. In cultivation, string of pearls will grow well if you pay attention to the following points:
1. Because the leaves are fleshy and juicy, it is drought-tolerant.
2. The plant's root system is very shallow, so it can be planted in a shallow pot. Generally, use a piece of tile to cover the bottom hole, and spread a layer of cinder or coarse sand to increase air permeability and drainage (especially when using commonly seen plastic pots for planting). For the soil, it is best to use leaf mold (mix fallen leaves from trees in autumn and winter with a certain amount of crushed soil, and mix in a certain amount of sand (the ratio of soil to sand is about 1:3).
3. It likes warmth and humidity, is relatively cold-tolerant (when cultivated in the Jianghuai region it can tolerate a low temperature of 0°C), and is heat-tolerant. The optimum temperature is about 20°C~28°C. Growth is slow at both high and low temperatures, and in a high-temperature environment it is almost dormant, so water and fertilizer should be reduced, otherwise it is prone to rot. If rot begins, immediately cut off the rotten part and take cuttings from the healthy parts, otherwise it will quickly rot completely. This is also one of the keys to successful cultivation.
4. In spring and autumn, apply "light fertilizer frequently"; often spraying 1-3‰ nitrogen fertilizer and potassium dihydrogen phosphate on the leaf surface helps make it more green and plump, improving its ornamental value.
5. There are rarely pests and diseases. Aphids in spring are one of them; remove them promptly or spray 1500 times omethoate to kill them. Mites in summer and autumn are secondary; use 1000 times dicofol to kill them. Pay attention to ventilation and increasing leaf surface humidity, which can reduce mite infection.
6. In summer it is prone to root rot, so watering should not be too frequent; use a small watering can to water.
Disease control for string of pearls
String of pearls likes a semi-shaded environment. If the placement site has too strong or insufficient light, the leaves will easily turn pale green or yellow-green, lose vitality, lose their proper ornamental value, and may even dry up and die; if exposed to direct sunlight and dry air, it is most likely to cause the spider plant to scorch, so it should be placed in a cool, ventilated place, and attention should be paid to maintaining environmental humidity. Methods to prevent blackening, drying, and shrinking of the leaf tips of potted spider plants:
1. Caused by dry air, overly intense sunlight, and excessively high temperature. This situation mainly occurs in summer and autumn, because spider plant likes to grow in a humid and semi-shaded environment. Once the air is too dry, the sunlight is unobstructed, and if the temperature is as high as 30°C or above, it is very easy to cause the leaf tips of the spider plant to wither. If this is the case, move the plant to a semi-shaded environment, cut off the withered leaves, and frequently spray water on the leaf surface and the surrounding environment; the newly emerging leaves can return to a normal state.
2. Caused by waterlogging in the potted soil and rot of the nutrient fibrous roots. Because the potted soil is compacted or too clayey, or because watering is too frequent and too much, the nutrient fibrous roots of the spider plant rot, and the root system's ability to absorb water will drop significantly, causing the tips of the spider plant leaves to first turn black and the edges to curl inward. If this is the case, take the plant out of the flower pot, shake off part of the old soil, cut off the already rotten root parts, and replant it in clean wet sand, keeping the sand moist but not spraying too much water. After it has produced tender white fine fibrous roots, replace with fresh fertile growing medium and replant.
3. Caused by not repotting for a long time, causing the roots to grow right up to the pot wall. In a high-temperature, dry environment or cold weather, this can easily cause the root tips to shrink and necrose, making them lose their proper absorption function, thus causing the leaf tips to dry up and shrink. If this is the case, first take the plant out of the flower pot, cut off the already dead leaves or the necrotic parts of the leaves, then pick out part of the old soil, remove some aged or necrotic roots, replace with fresh growing medium and replant well, and place it in a cool, humid, semi-shaded environment. Pay attention to spraying more water and watering less; the plant's newly emerging tender leaves can then return to normal.