Dragon fruit cactus (Selenicereus undatus)
undatus
About this plant
Selenicereus undatus, commonly called dragon fruit cactus, is a climbing cactus known for its large, fragrant white flowers and striking pink or red fruit with white flesh and tiny black seeds. It is popular both for its ornamental flowers and its edible fruit. The plant has long, triangular green stems with small spines and grows as a vine that often needs support. It blooms mainly at night, attracting pollinators like bats and moths.
Taxonomy
Higher classification: Order Caryophyllales
Origin & Distribution
- Native region
- Central America
- Distribution
- Native to Central America and widely cultivated in tropical and subtropical regions worldwide, including Southeast Asia and parts of the United States.
Care
- Suitable locations
- Indoor, Outdoor, Balcony, Greenhouse
- Preferred window facing
- South-facing, East-facing, West-facing
- USDA hardiness zones
- 10-11
- Soil pH
- 6.0-7.0 (slightly acidic to neutral)
- Soil type
- well-draining cactus or succulent mix
Watering. Water thoroughly when the top inch of soil feels dry. Reduce watering in winter. Avoid waterlogging to prevent root rot.
Fertilizing. Feed with a balanced, diluted fertilizer every 4-6 weeks during the growing season (spring and summer). Avoid fertilizing in winter when the plant is dormant.
This cactus is fairly easy to care for but needs bright light and well-draining soil. It can tolerate some drought but prefers regular watering during growing seasons. Watch for root rot if overwatered and provide support as it grows long stems.
Propagation
- Propagation methods
- Cuttings, Seeds
Ornamental features
- Flowering
- Yes
- Flowering period
- summer
Large fragrant white night-blooming flowers, bright pink/red fruit with white flesh, long green triangular stems.
Toxicity & Safety
Non-toxic to humans and pets. Safe to grow around children and animals.
Allergy information
Selenicereus undatus, also known as dragon fruit cactus, has low allergy risk. People sensitive to cactus sap might experience mild skin irritation. To reduce exposure, avoid direct contact with the plant's sap and wear gloves when handling or pruning.
Common problems
Overwatering can cause root rot. Insufficient light may lead to weak growth. Pests like mealybugs or spider mites can occasionally appear.
Uses
Grown for its ornamental flowers and edible fruit, which is sweet and refreshing. Also used in landscaping and container gardening.
Notes
Prune to control size and encourage branching. Provide a trellis or support for climbing. Repot every 2-3 years to refresh soil and allow root growth. Protect from frost and cold drafts.