Selenicereus undatus, the white-fleshed pitahaya, is a species of the genus Selenicereus in the family Cactaceae and is the most cultivated species in the genus. It is used both as an ornamental vine and as a fruit crop, the pitahaya or dragon fruit. Like all true cacti, the genus originates in the Americas.
Requires full sun, well-draining soil, and regular watering. Key care steps include providing 6 to 8 hours of daily sunlight, watering when the top couple of inches of soil are dry, and setting up a sturdy trellis or support structure for its climbing stems.
Provide at least 6 to 8 hours of direct sun daily. In extremely hot desert regions with temperatures over 100°F, use partial or afternoon shade to prevent scorching.
Thrive in warm weather between 65°F and 100°F. They are not cold-hardy, cannot handle frost, and must be brought indoors or protected if temperatures drop below 45°F.
Soil: Use a sandy, well-draining cactus and succulent mix enriched with organic matter or compost.
Watering: Unlike desert cacti, dragon fruit need more frequent moisture. Water deeply when the top 2 inches of soil feel dry, reducing water during winter dormancy. Avoid letting the plant sit in standing water to prevent root rot
Support: Use a strong stake, pole, or trellis, as these are climbing cacti that grow heavy.
Pruning: Trim away dead, damaged, or low-hanging unproductive stems to improve air circulation and encourage better flowering and fruit production.
Fertilizing: Feed monthly with a balanced organic or slow-release fertilizer during the active spring and summer growing seasons.