Light
Filtered Sun
Prefers bright, filtered or indirect sunlight. Avoid scorching direct sun.
Reference image Epiphyllum × rollissonii
Rollisson's Orchid Cactus
Overview
Epiphyllum × rollissonii is a historically significant artificial hybrid within the family Cactaceae. Celebrated for its large, vibrant reddish-orange flowers, this epiphytic cactus is a highly sought-after specimen among horticultural collectors 1.
Taxonomy and Naming
The '×' in its botanical name denotes its hybrid origin, created by crossing species within the genus Epiphyllum. The epithet 'rollissonii' pays tribute to the Rollisson nursery, where early hybridization work took place 2.
Natural Distribution and Habitat
This plant does not exist in the wild. While wild Epiphyllum species are native to the tropical rainforests of Central and South America, this specific hybrid was intentionally bred in cultivation 1.
Appearance
It features flattened, leaf-like green stems with undulating margins that initially grow upright before gracefully cascading. The spectacular, funnel-shaped flowers bloom in late spring, often opening at night 2.
Care in Cultivation
It thrives in high humidity and bright, indirect or filtered sunlight. Because of its epiphytic nature, the root system requires excellent aeration. Water thoroughly only when the top layers of the soil feel dry 1.
Common Care Mistakes
Exposing the plant to harsh, direct sunlight causes severe stem scorching. Overwatering combined with dense, heavy soil mixes is the most common cause of root rot.
References
Watering
7-14 Days
Water thoroughly when the topsoil dries; reduce significantly in winter.
Soil
Slightly acidic, highly draining, epiphytic soil mix amended with pine bark and perlite
Thrives in loose, well-aerated mixes rich in bark and perlite.
Safety
Pet Friendly
Non-toxic and safe for cats, dogs, and other household pets.
Difficulty
Moderate
Moderately easy if humidity and drainage requirements are met.
Native Habitat
Horticultural Origin
This plant has no wild distribution; it was developed in cultivation through selective breeding of various Central and South American forest cacti.
Frequently Asked Questions
How often should I water Epiphyllum × rollissonii?
Water during spring and summer whenever the top inch of soil feels dry. Reduce watering by half during its winter dormant phase.
What potting mix should I choose?
Standard cactus soil may be too dense. An airy epiphytic mix containing pine bark, perlite, and a small amount of peat is ideal.
Is this plant toxic to cats and dogs?
No, Epiphyllum × rollissonii is completely safe and non-toxic to household pets.
How can I encourage it to bloom?
During winter, keep the plant in a cool room (around 10-15°C) and reduce watering. This winter rest triggers bud development in spring.
Can it tolerate direct sunlight?
No, harsh direct sunlight can scorch its stems. Filtered sunlight or bright indirect light positions are preferred.
What is its growth rate?
It has a moderate to fast growth rate under warm, humid conditions, quickly producing long cascading stems.
When should I repot the plant?
It prefers being slightly rootbound. Repotting is generally recommended every 2-3 years, right after the blooming season ends.
Why are the stems shriveling?
Shriveling stems usually indicate severe dehydration or, conversely, root rot caused by overwatering. Check the soil moisture to diagnose.
How is it propagated?
It is easily propagated via stem cuttings. Let the cut end callus for a few days, then plant it in moist, well-aerated soil.
How long do the flowers stay open?
The flowers typically open at night and can remain fresh for a few days depending on ambient temperatures.