A Detailed Guide to the Latest Cultivation Methods for the Orchid Cactus
The orchid cactus (Epiphyllum) is a perennial evergreen epiphytic plant of the Cactaceae family, with a wide variety of flower colors and varieties. It is deeply loved by people for its delicate and graceful posture, brilliant colors and rich fragrance. It is mainly grown as a potted ornamental plant, and in greenhouses multiple varieties are often combined to enhance the ornamental effect. Now the editor will introduce the cultivation methods for the orchid cactus!
Growth Habits of the Orchid Cactus
The orchid cactus prefers a warm and humid environment, avoids direct sunlight, tolerates drought, tolerates partial shade, fears rain, and requires fertile, loose, well-drained neutral or slightly acidic sandy loam. The optimal temperature during the growing period is 20-25°C, the optimal temperature for flower bud differentiation is between 10-15°C, the winter temperature must not be lower than 5°C, and the flowering period is in April.
The orchid cactus should be grown in loose, fertile and well-drained soil, and it likes fertilizer, so more fertilizer should be applied during the growing period so that it can bloom on time and produce beautiful flowers. It is suited to a warm and humid environment, should not be exposed to direct sunlight on a balcony, tolerates drought and fears rain. Although it likes humidity, the soil for growing the orchid cactus should still be on the drier side, otherwise it will cause root rot.
Propagation Methods of the Orchid Cactus
1. Cutting propagation: best done between March and April each year. First cut a 10 cm long healthy flat stem as a cutting, let it dry for 2-3 days after cutting, then insert it into moist sandy soil or vermiculite, with a depth of 1/3 of the cutting, keep the temperature at 10-15°C, and mist it frequently; it will generally take root in about one month and can then be potted.
2. Grafting propagation: best done at 25°C. The rootstock can be a cactus; cut a wedge-shaped notch in the rootstock with a knife, then take a 6-8 cm long healthy stem segment of the orchid cactus as the scion, make a cut on each side of the scion to expose the stem pith and form a wedge shape, then insert it into the slit of the rootstock, tie it firmly with hemp fiber, and place it in a shady spot for care. After about 10 days, the grafted part will have joined; remove the hemp fiber and carry out normal care.
3. Division propagation: clumps of branches that form from the lower part of old perennial plants can also be propagated by division.
Cultivation Methods of the Orchid Cactus
In summer, when the weather is hot and the sunlight is strong, it should be placed under a shade canopy to avoid direct sunlight, and water should often be sprayed around the pot to increase air humidity. Before the frost in winter, it should be moved indoors; when the temperature is above 5°C it can overwinter safely. In March, move the plant to a sunny place and keep the temperature at 10-15°C to promote flower bud differentiation. When the flower buds form, if they are too dense, thin them out appropriately. The potting soil can be made from garden soil + sand + organic fertilizer. As the plant grows, repot and change the soil every spring and autumn to promote rapid growth, and set up a support to prevent the branch tips from breaking, which also helps ventilation and light penetration and keeps the plant shape attractive.
The orchid cactus tolerates drought, so the potting soil should not be too wet. During the flower bud formation period from March to April, more water and fertilizer should be given, and a phosphorus fertilizer can be applied once to help it accumulate nutrients, produce more buds and bloom more, but the potting soil should not be too wet. May to July is the blooming season; at this time less water should be given and no fertilizer applied, and generally watering thoroughly once a week is enough. After the flowers fade, the potting soil should be kept slightly dry. After moving indoors in winter, watering should follow the principle of “water thoroughly when dry”, otherwise it is prone to rot.
The orchid cactus likes fertile, loose, well-drained, slightly acidic leaf-mold soil (a pH of 5-6 is most suitable); heavy clay soil conditions make it prone to root rot; in winter it requires relatively dry soil. But generally speaking, the orchid cactus is mostly potted and can be propagated by cuttings. In early spring, in March or April, cut off a section of the orchid cactus stem as a cutting, then insert one third of the bottom into prepared thin mud and sand, spray a little water appropriately every day, and it will take root in about one month continuously; grafting can also be used. The grafting method for the orchid cactus is generally cleft grafting: first choose a well-growing cactus as the rootstock, then make a cut in it and insert the orchid cactus stem strip into the cut, preferably tightly, then tie the joint with a wet cloth strip, and once the joint gradually joins, the wet cloth strip can be loosened.
The good growth of the orchid cactus cannot be separated from routine care. The orchid cactus is a plant that likes light but is not cold-tolerant, so it should normally be given plenty of sunlight exposure. However, note that although it likes light, it fears being scorched, so shading work in summer is still necessary. If the orchid cactus you grow only grows leaves and does not bloom, it is very likely caused by insufficient sunlight.
During the growing period of the orchid cactus, fertilizer and water care must be in place. On average, a liquid fertilizer or dilute fertilizer should be applied once every half month. If you find that the plant has already formed buds, take the opportunity to apply a phosphorus fertilizer once to encourage the orchid cactus to bloom larger, more colorful flowers. When fertilizing, note that if the fertilizer and water are too abundant, many small side shoots will grow on the stems. At this time, do not be reluctant; the earlier these side shoots are removed, the better, otherwise they will easily rob the main flowering stems of nutrients, and after the side shoots grow they also affect the overall appearance. After fertilizing, remember to water; fertilizer diluted by water is more conducive to absorption by the roots and stems. Usually, watering so that the soil is half dry and half wet is enough, to avoid water accumulation and root rot. When the weather is dry, you can separately spray some water on the flower stems of the orchid cactus; in winter, water and fertilizer can be omitted.
In addition, the best cultivation temperature for the orchid cactus is 15 degrees; being a little lower or a little higher is not a big problem, but if it is too high or too low, it will affect its growth, either producing many abnormal stems or having the buds frozen to death, so the temperature should also be controlled as well as possible. Finally, if the orchid cactus is grown indoors, the indoor air circulation should also be ensured.
Four-Season Care of the Orchid Cactus
1. Spring: During the growing season of the orchid cactus, pay attention to sufficient light and timely fertilization. Apply a fertilizer combining nitrogen and phosphorus once every 10-15 days to promote healthy growth of flowers and leaves. Avoid water accumulation in the pot to prevent root rot. Starting in April, flower buds grow at the edges of the upper fleshy leaf segments and gradually swell, then bloom fully half a month later. If at this time the plant lacks nutrients and its growth is weak, it will not bloom or will bloom less. To prevent this from happening, 1-2 additional applications of quick-acting phosphorus fertilizer can be given in advance. At the same time, excess side buds and branch buds at the base should be removed.
2. Summer: During the period of vigorous growth, 1-2 topdressings mainly of nitrogen should be applied in time. This both promotes new branches and leaves and helps produce more buds and more flowers next spring. To increase the number of stem segments, take advantage of this favorable period to keep buds. In the high heat of midsummer, the orchid cactus enters a semi-dormant period, and it should be placed in a ventilated, cool, semi-shaded spot, fertilization should be stopped, watering should not be excessive, and the potting soil should be kept slightly dry, to prevent excessive shading that causes leggy growth and affects flowering.
3. Autumn: This is the second period of vigorous growth in the year. New leaves gradually age and mature, and the management and care methods are basically the same as in spring and early summer from May to June. Apply 2-3 topdressings, mainly phosphorus and potassium fertilizers. Also increase the light duration.
4. Winter: After the frost, when the weather turns cold, it needs to be moved indoors for warmth and can be placed in a sunny spot indoors, with the room temperature kept at 8°C. Stop fertilization, restrict watering, and keep the potting soil on the dry side; too wet will cause the leaves to wilt and fall over and cause root rot. From mid-March to early April after spring, as the temperature rises, gradually extend the time for opening windows for ventilation and hardening, to lay the foundation for later moving outdoors for care.