Epiphyllum are epiphytic cacti as their name suggests. Some call them orchid cactus due to their large bright blooms and growth habit. Epiphytic plants grow on other plants, not in a parasitic fashion but as hosts. They are not cold hardy and generally can be found only as houseplants or greenhouse specimens.
Read more at Gardening Know How: Epiphyllum Plant Care: Tips For Growing Epiphyllum Cactus https://www.gardeningknowhow.com/ornamental/cacti-succulents/epiphyllum/epiphyllum-plant-care.htm
Epiphyllum are an epyphitic cacti as the name suggests. They also have tremendous blooms. These flowers are impressive in size, color, and often times fragrance! Fragrance is the one aspect of Epiphyllum that is simply not admirable unless you own one. A single bloom on certain 'orchid cacti' has the ability to incense an entire house.
We recommend purchasing 2 or 3 cuttings when planting up a pot as it will ensure the development of a robust and aesthetic plant.
Epiphyllum do best in partial shade in a fertile soil mix. Keep reasonable moist throughout the year, a little less so in winter. They enjoy humidity and so benefit from spraying.