Hylocereus undatus

Widely grown around the world in tropical regions, the exact origin is unknown, but is likely from West Indies, Caribbean basin, Southern Mexico through Belize and Guatemala. Hylocereus undatus is a sprawling or vining, terrestrial or epiphytic cactus. They climb by use of aerial roots and can reach a height 10 meters or more growing on rocks and trees. They are very variable and closely related to Selenicereus. Flowers are ornate, fragrant and beautiful 25-35 cm long by 30 cm across, white with green outer tepals and bracts. It bloom only at night, and usually the flower last just one night, in tropical climate the plants can have up to 4-6 flowering-fruiting cycles per year. In temperate climate they bloom in late spring to early summer.