Epiphyllum oxypetalum (also known as Dutchman's pipe cactus, queen of the night and night-blooming cereus) is a large epiphytic cactus native to Mexico and Brazil. Epiphyllum oxypetalum reaches 20 feet in height. The dark green branches reach 3 feet long. This cactus lacks true leaves; its leaf-like growth is really flattened stems. Its showy blooms appear in late spring or early summer, and its white flowers are 11 inches long and 5 inches wide. This fragrant, nocturnal bloom opens in the late evening and closes again at sunrise. Epiphyllum oxypetalum is commonly grown as a houseplant.
Plant your Epiphyllum oxypetalum in moist, well-draining soil. Mix two parts peat moss, one part sand and one part pine bark.
Place your cactus in a site with full sunlight to partial shade exposure. The site should not be an area where temperatures fall below 35 degrees F.
Water Epiphyllum oxypetalum daily or whenever the surface is dry. Reduce the amount of water given in the winter. Do not let the soil dry out all the way.
Feed every month with a 10-10-10 balanced fertilizer diluted to half strength. Do not fertilize the Epiphyllum oxypetalum during its inactive period during the winter.
Stake or tie the vines to a small lattice. This provides the support the cactus branches need to grow upright.
Repot Epiphyllum oxypetalum every two years to keep the cactus healthy. This plant likes crowded roots. Re-pot to replace the soil nutrients, improve water drainage and add air to its roots.