Botanical Name: Epiphyllum spp.
Big, cup-shaped blooms in gorgeous colors make orchid cactus a joy to grow. Show it off in a hanging basket and allow the long stems to cascade over the pot.
Flowers emerge at the ends of the stems in spring, and can be 4-6 in (10-15 cm) wide. Most epiphyllum grown today are hybrids and may be pink, red, white, yellow, orange, purple or bicolored. Give your cactus plenty of light and you'll enjoy months of blooms.
Orchid cactus stems are broad and flat with serrated edges. They are segmented and joined by a midrib.
Use sharp, clean pruning shears to prevent tearing the stems. Cut a stem off between segments (the place where they're joined together by a midrib).
Regular pruning will encourage the plant to branch out where the stem was cut, creating a fuller plant. Spring is the best time to prune it back, when it begins actively growing again.
Don't toss out those orchid cactus cuttings! Propagate them to get more of these captivating plants.
Growing this flowering cactus is easy, but a few things you can do will help it to bloom:
Repot every 2-3 years, moving up to a pot 1 size larger. It prefers to be slightly pot-bound and blooms best this way. Wait till early spring to repot -- never while it's blooming.
Origin: Hybrids with parents native to Southern Mexico
Height: Trails to 4 ft (1.2 m); cut it back to control its size
Light: Bright light, but no direct sunlight
Water: Keep the soil moist spring through fall, while plant is growing. In winter, water sparingly until new growth begins in spring. Never allow it to dry out. Shriveled, limp stems are a sign the soil is too dry.
Humidity: Moderate -- about 50-60% humidity. Stand the pot on a dish of wet pebbles to boost humidity.
Temperature: Average room temperatures 60-75°F/16-24°C. To set flower buds, the plant needs 8-10 weeks of cool 60-65°F/16-18°C days and 45-55°F/7-13°C nights in winter.
Soil: Mix 1 part potting mix and 1 part perlite
Fertilizer: Feed every 2 weeks from early spring through fall with a high-potassium liquid fertilizer diluted by half.
Propagation: Detach 4-6 in (10-15 cm) stem segments in spring and place upright in moist potting mix. Stem cuttings root easily, but you may wait a few years to see many blooms on a new plant.
These tropical cactus plants need a cool winter rest for buds to develop.
They also do best with moderate humidity. Check out these tips for raising humidity for house plants.
The true orchid cactus is still commonly known as Epiphyllum, but has been renamed Nopalxochia.
Many hybrids and cultivars are available. Well-known for their night-blooming flowers, newer hybrids have been developed for daytime blooms.
Epiphyllum oxypetalum (shown above) is among the most popular species of this genus. It bears white, fragrant flowers that bloom for one night only -- then wither by morning. If you sneak up on it during the night, you'll catch it in full bloom.