How to grow Rambutan
Updated October 2026
Rambutan is a lowland tropical tree related to lychee and longan, with red, soft-spined fruit around sweet, translucent flesh. It needs steady warmth, high humidity and rain, and is hurt by cool nights, so in the US it is really a crop for the warm, wet lowlands of Hawaii. In South Florida only the warmest frost-free coastal gardens are worth a try.
📖 Our full guide: How to Grow Rambutan
Not to be confused with: Rambutan is often mistaken for lychee, a close relative. Lychee has a rough, bumpy red shell and is far more tolerant of cool winters; rambutan has long, soft hairs and needs constant tropical warmth.
Where to plant
Rambutan needs a hot, humid, frost-free climate with plenty of rain, and deep, rich, well-drained, slightly acid soil. Plant it in full sun, sheltered from strong wind.
In Hawaii, rambutan is grown commercially on the Big Island around Hilo. Elsewhere in the US it is very marginal.
- Hawaii: the best US location, in warm, wet lowlands. Plant in spring or fall.
- South Florida: very marginal. Only the warmest frost-free coastal gardens are worth a try, planted in spring, and cool winter nights can still set trees back.
- Everywhere else: not suited outdoors. It can be kept in a large container in a heated greenhouse, but rarely fruits there.
Choosing a variety
Always plant a grafted or air-layered tree of a named variety. Seedling trees are slow to fruit, variable, and some turn out to be male trees that never bear fruit. Varieties grown in Hawaii include Jitlee, Binjai, R9, R134, R156, R162, R167 and Silengkeng. Silengkeng produces more pollen-bearing flowers than most, which makes it a useful pollinator for other trees.
How to plant
- Choose a sunny, sheltered spot with deep, well-drained soil, well away from buildings.
- Plant the grafted tree at the depth it grew in its pot, in the warm, wet season.
- Water in thoroughly and mulch widely, keeping mulch off the trunk.
- Keep the soil moist while the tree establishes; young trees dislike drying out.
Watering and feeding
Rambutan needs regular water through most of the year. In Hawaii, a short dry spell, which shows as leaf curling, triggers flowering; after flowering, steady moisture is needed while fruit develops.
Feed young trees lightly and often with a balanced fruit tree fertilizer during the growing season.
Pruning and care through the year
- Most flowers on grafted trees are functionally female and shed no pollen. Poor pollination gives misshapen fruit, so planting a pollinator such as Silengkeng nearby helps fruit set.
- Prune after harvest to keep the tree low enough to pick and net.
Harvesting
Rambutan does not ripen further after picking. Harvest when the skin and hairs are fully colored, usually bright red or yellow depending on variety, by cutting whole clusters with pruners. In Hawaii, flowering in spring and summer gives a main crop in late summer and a smaller one in winter.
Fresh fruit keeps only a few days at room temperature and about a week in the fridge in a bag.
Using it
Split the soft skin with a thumbnail or knife, squeeze out the white flesh and eat it fresh, spitting out the seed. It is also used in fruit salads and desserts.
Companion planting
Rambutan suits a tropical orchard with other lowland fruit trees that need the same warmth and water.
Good companions
- Tropical fruit trees It shares the same warm, wet conditions and steady watering as mango, banana and other tropical fruit.
Pests and diseases
Birds take ripe fruit. In wet weather, fungal diseases can attack fruit and stems.
Pests to watch for
- Birds Pecked, opened fruit on ripening clusters; net the tree or bag clusters.
Diseases to watch for
- Powdery mildew White powder on young leaves, flowers and young fruit, causing them to drop.
- Stem canker
Common questions
Can I grow rambutan in Florida?
Only with great difficulty. Rambutan needs constant warmth, humidity and rain and is hurt by cool nights. Only the warmest frost-free coastal gardens of South Florida are worth a try. Hawaii's warm, wet lowlands suit it far better.
Why does my rambutan tree not fruit?
Seedling trees can take many years and some are male trees that never fruit, so plant a grafted variety. On grafted trees, poor pollination gives few or misshapen fruit; a pollinator variety such as Silengkeng nearby helps.
What is the difference between rambutan and lychee?
They are close relatives. Rambutan has long, soft hairs on its skin and needs constant tropical warmth. Lychee has a rough, bumpy shell and tolerates the cooler winters of Central and South Florida.
When is rambutan ripe?
When the skin and hairs are fully colored, usually bright red. The fruit does not ripen after picking, so leave it on the tree until it is ready.
Can I grow rambutan from seed?
You can, but seedlings are slow to fruit, vary in quality and some are male trees that never bear fruit. A grafted or air-layered tree of a named variety is much more reliable.
Sources we checked: University of Hawaii CTAHR: Tropical fruit and nut master gardening (2010); USDA NIFA project, University of Hawaii: Flowering, fruit set and production of rambutan, lychee and longan in Hawaii.
Loading sow calendar…