What are the cultivation methods and precautions for creeping peperomia (Peperomia tetraphylla)?
1. Substrate: It prefers loose, fertile, well-drained sandy soil rich in humus, and grows poorly in clay. A general substrate mix can be made by combining leaf mold + river sand + a small amount of decomposed organic fertilizer; if conditions allow, a mix of peat soil and perlite can also be used.
2. Light: It prefers semi-shade or scattered light. Apart from winter, when it needs ample light, it needs a little shading in the other seasons, and especially in summer it needs more shading. If placed in a shaded environment, it tends to grow leggy, with longer internodes, reducing its ornamental value, which is also undesirable. Under semi-shade conditions, the leaf color is brighter and the gloss is better, especially for variegated cultivars, which need slightly more sunlight.
3. Temperature: It prefers a warm environment, with an optimal growing temperature of 20-30°C. The overwintering temperature is best kept above 10°C; below 10°C growth stops, and below 5°C it is prone to frost damage.
4. Humidity: It prefers a moist growing environment. Under high-humidity conditions it grows luxuriantly with vivid leaf color. When the temperature is high or the air is dry, increase leaf spraying or sprinkle water in the growing environment to maintain higher air humidity, which is extremely beneficial to plant growth. It can also adapt to brief dry conditions, but not for long; generally humidity should be kept at around 70%.
5. Watering: It is relatively fond of water and not tolerant of drought. During the growing season, water frequently; when the temperature is above 25°C or the air is dry, water more, but also prevent waterlogging. When the temperature is below 25°C, water thoroughly again only when the pot soil surface is dry. When the temperature is below 10°C, it can tolerate several days of dryness without watering.
6. Fertilizing: When the temperature is above 18°C, a small amount of fertilizer is needed. When the temperature is below 18°C or above 30°C, it is best to apply little or no fertilizer. Fertilizing is best done in small amounts and more frequently; watering with diluted fertilizer solution instead of plain water is best. It is not tolerant of raw or concentrated fertilizer, which can easily cause fertilizer burn. Foliar spraying with fertilizer solution can also be used, with good results. Fertilizers are mainly nitrogen and potassium, with phosphorus secondary.
7. Pruning and propagation: For newly propagated young seedlings, pinch out the growing tips when the seedlings are about 10 cm tall to increase the number of branches; this makes the plant shape fuller and its ornamental value higher. Pruning of large plants is generally based on their growth; cutting back leggy branches can provide cuttings, which root easily and can be inserted in clean river sand or vermiculite, or directly inserted in sandy soil. Propagation can also be done by leaf cuttings and division. The environmental temperature needed for propagation is generally between 20-25°C. Leaf cuttings need to have a petiole and are inserted upright or slightly tilted in river sand, with the insertion depth being 1/4-1/3 of the petiole. Keep the substrate moist and the air humidity high; roots and adventitious buds will form in 2-3 weeks. Once the small buds are somewhat larger, they can be transplanted.
8. Hydroponics: Longer branches can be cut directly, or the whole pot can have its substrate rinsed off before hydroponic culture. When inserting branches, the environmental temperature is about 20-25°C, and new roots will grow in about 2 weeks. Hydroponic culture has good ornamental value.
9. Pests and diseases: Peperomia has relatively few pests and diseases; the diseases that generally appear are caused by improper care and unsuitable environment, and it can gradually recover after adjustments. The main pest is red spider mite, but it can be prevented by maintaining high air humidity. When it occurs, it can be controlled by wiping the leaves with a damp cloth or spraying with a specific pesticide.