Longan (Dimocarpus longan)
E-Daw
About this plant
The longan is a tropical fruit tree known for its sweet, translucent fruit similar to lychee. It has glossy green leaves and produces small white flowers before fruiting. The fruit grows in clusters and has a thin brown shell with a juicy, sweet interior. Longan is popular in Asian cuisine and is often eaten fresh or dried.
Taxonomy
Higher classification: Order Sapindales
Origin & Distribution
- Native region
- Southern China, Southeast Asia
- Distribution
- Native to Southern Asia, widely cultivated in tropical and subtropical regions including Southeast Asia, China, and parts of Florida and Hawaii.
Care
- Suitable locations
- Outdoor, Greenhouse
- Preferred window facing
- South-facing, Southeast-facing, Southwest-facing
- USDA hardiness zones
- 10-12
- Soil pH
- 6.0-7.5
- Soil type
- well-draining loam, sandy loam
Watering. Water regularly during the growing season but allow the soil to dry slightly between watering. Reduce watering in winter.
Fertilizing. Fertilize the longan tree three times a year with a balanced fertilizer, especially during the growing season. Use a fertilizer high in potassium to encourage fruiting.
Longan trees are moderately easy to care for but need warm temperatures and plenty of sunlight. They prefer well-draining soil and moderate watering. They can be sensitive to cold and require protection from frost. Regular pruning helps maintain shape and fruit production.
Propagation
- Propagation methods
- Seeds, Cuttings, Grafting
Ornamental features
- Flowering
- Yes
- Flowering period
- spring
Glossy green leaves, clusters of small white flowers, and attractive round fruit clusters.
Toxicity & Safety
Longan fruit and tree parts are generally safe. However, seeds are not edible and should be kept away from children and pets.
Allergy information
Longan trees produce pollen that can cause mild allergic reactions in sensitive individuals, such as sneezing or itchy eyes. People who are allergic to similar fruit trees might react. To reduce exposure, avoid being near the tree during its flowering period.
Common problems
Common problems include root rot from overwatering, leaf drop due to cold stress, and pests like aphids or scale insects.
Uses
Grown mainly for its sweet edible fruit, longan is also used ornamentally in gardens and landscapes in warm climates.
Notes
Protect young trees from frost and strong winds. Prune after harvest to maintain shape and remove dead wood. Repot young trees every 2-3 years if grown in containers.