How to cultivate top-quality Christmas cactus? Latest method shared

The Christmas cactus (Schlumbergera) is an epiphytic succulent plant from the tropical rainforest. Its leaves have degenerated into flat, leaf-like modified stems that perform the function of leaves. On each side of the stem there are 2-4 coarse serrations; the stem has no spines, but branches profusely and takes on a drooping form, with the stem segments joined together, resembling a crab claw, hence the name. It blooms at the tip of the stem; the flowers have no stalk, are funnel-shaped, double-petaled, with every two petals symmetrical and curling outward. Flower colors include deep purplish red, rose red, pink, yellow, white and so on. Some bloom before New Year's Day, and some bloom during the Spring Festival, with a flowering period lasting 30-40 days. A three-year-old grafted and properly supported Christmas cactus can reach a crown diameter of 70-100 cm, with the stem segments hanging upside down outside the pot, dotted with red flowers amid the emerald green, and can open 200-300 flowers at the same time, which is very spectacular. In the cold winter season, it is truly an excellent ornamental plant, deeply loved by flower enthusiasts.

Although the Christmas cactus belongs to the cactus family, it differs in many ways from the various cacti people commonly see. It prefers shaded, ventilated and humid environments, and fears both heat and cold. Direct scorching sunlight or rain will harm it. Under dry, hot and stuffy conditions, it not only grows poorly but also fails to bloom, and will even attract red spider mite damage. The potting soil is best a fertile, loose, microacidic soil rich in humus. The management priorities for the four seasons are as follows:

(1) Spring management: After the winter flowers fade, promptly cut back to 3-4 stem segments below the spent flowers, and at the same time thin out some old stems and overly dense stem segments, to achieve shaping and to facilitate ventilation. After flowering in March, there is a short dormant period, during which fertilizer should be stopped and water controlled, until new buds emerge from the stem segments, then normal water and fertilizer management can resume. The frequency of watering should increase as the temperature rises; water only when the potting soil is dry, and keep it moist. When the air is too dry, the stems and leaves can be misted appropriately. Apply dilute nitrogen fertilizer once every 10-15 days, during March to April. To facilitate drainage, first fill the bottom of the pot with a layer of small stones about 3 cm, then cover with soil and add base fertilizer; the base fertilizer is best aged poultry manure rich in phosphorus. Cover the base fertilizer with a thin layer of soil before planting the seedling; use a microacidic culture soil for planting, not alkaline soil.

(2) Summer care and management: The Christmas cactus can grow slowly at 15°C; at around 25°C with relatively humid air, it grows faster; when the temperature exceeds 30°C, even in a shaded environment, its growth rate gradually declines and it enters a semi-dormant state. At this time, the Christmas cactus should be placed in a cool spot under a shade awning on the balcony, or hung in a ventilated place indoors, to prevent scorching sunlight and avoid rain. Mist frequently to increase humidity and lower the temperature. If exposed even briefly to the sun, or kept in a stuffy place, the plant will be scorched, causing the stem segments to yellow, wilt, drop off and die. In summer, watering must not be excessive, and fertilizing is even more forbidden, otherwise it will lead to root rot and death.

(3) Autumn and winter care and management: In early autumn the temperature is still high, so misting the leaves and sprinkling water around the environment should continue. From September, the climate conditions gradually become suitable for the Christmas cactus to grow. In mid to late September, as the temperature drops, morning and evening sunlight can be given. In mid to late October, full sun should be given, to promote flower bud differentiation and produce more flower buds. By early to mid November, the temperature turns colder, and the Christmas cactus must be brought indoors to overwinter, and placed in a spot with sufficient sunlight. But during the flowering period, direct sunlight should be avoided to prolong the flowering period. Watering in autumn should be moderate; the potting soil should still be kept moist, neither dry nor waterlogged. Too dry, too wet, or too great a day-night temperature difference will all cause flowers and buds to drop. In winter the temperature is low, so the Christmas cactus's transpiration is reduced accordingly, its growth slows down, and it needs less water, so even more care must be taken not to overwater. Overwatering in winter will lead to root rot and death. Autumn and winter are the period when the Christmas cactus forms buds and blooms; apply a phosphorus-rich liquid fertilizer once every 7-10 days, and do not fertilize during the flowering period. Winter temperatures change easily, so heat preservation and ventilation must be done well. When the room temperature drops to 5°C, protect against freezing. To make the Christmas cactus bloom at the right time in winter, the room temperature must be kept at around 15°C, otherwise, even with a pot full of flower buds, it will be hard for them to open.