Pulasan (genus Nephelium), also known as kapulasan, is a tropical evergreen tree and a close relative of rambutan and lychee. The fruit is covered in thick red skin studded with short, hard spines; peel it and the flesh inside is white, translucent and tastes much like lychee. Unusually, even the seed is edible – roasted, it is compared to almonds or rambutan seeds.
It is a rewarding tree, but it comes with one requirement that decides whether you ever get fruit at all.
The first thing to know: you usually need two trees
Pulasan carries male and female flowers on separate trees. This matters more than any other growing detail, because a single seedling may never fruit – not because you did anything wrong, but because it turned out to be male, or because a lone female had nothing to pollinate it.
Your options are:
- Grow a female and a male tree together.
- Obtain a female that self-pollinates.
- Graft male and female cultivars onto the same tree – the practical answer in a normal-sized garden, and the reason grafting is recommended even though it is not strictly necessary.
Pollination is carried out by bees and flies, so avoid spraying while the tree is in flower if you want a crop.
Starting pulasan from seed
Seed is possible, but it is not the recommended route – both because of the male/female lottery above and because of the longer wait for fruit. If you do want to try it, the critical point is that the seed must be fresh. Pulasan seed, like lychee and rambutan, loses viability quickly once it dries out, so sow it as soon as you have eaten the fruit.
- Clean the seed. Remove all the pulp – leftover flesh invites rot and mould.
- Soak the seed for about 20 minutes (optional).
- Prepare a small pot of clean soil.
- Sow the seed about 0.5 cm below the surface.
- Cover lightly – do not press the soil down hard.
- Trap humidity by covering the pot with plastic wrap.
Seeds should germinate in about 10–20 days. Keep them warm and humid throughout – this is a tropical tree and the seedling stage is where it is least forgiving.
The better routes: air layering and cuttings
For an actual crop, air layering and cuttings are the preferred methods. Both reproduce a known plant of known sex, and both reach fruiting age sooner than a seedling – a tree from a cutting fruits in less time than one grown from seed.
Climate, soil and water
Pulasan is strictly tropical. This is not a plant that can be talked into a cooler climate, a pot or a windowsill.
- Hardiness: zone 11+, completely frost free.
- Humidity: high humidity is a requirement, not a preference.
- Soil: acidic, pH 4.5–6.
- Water: a large amount – keep the soil consistently moist.
- Light: full sun.
- Shelter: it is sensitive to wind, especially when young, so give it a protected position or a windbreak.
Plant in spring, summer or autumn. In zones 10b–11 plant in spring, giving the tree the longest possible warm spell to establish before any cool weather.
It is not suitable for containers or indoor growing – between the eventual size and the humidity demands, it needs to be in tropical ground.
Size and growth speed
Expect a tree of about 4–8 m (12–24 ft). Growth is medium overall, but noticeably slow for the first few years before it accelerates. This early slowness is normal and not a sign of a problem – the tree is establishing roots before it puts on visible size.
Flowering, fruiting and harvest
The flowers are white and tiny, only 1–2 mm, and are carried on separate male and female trees.
- Bloom season: winter to spring.
- Harvest: spring and summer.
- Time to first fruit: about 4–5 years – less if the tree was started from a cutting.
The fruit needs no special preparation work – unlike some tropical fruit crops, there is no bagging, thinning or hand-pollination routine required once the tree is producing.
What to do with the fruit
- Eaten fresh – the usual and best use.
- Jelly and jam.
- Alcohol.
- The seeds – edible raw, and often roasted.
The seed is worth mentioning again because it sets pulasan apart from its relatives: with rambutan and lychee the seed is discarded, but pulasan seed is genuinely eaten, and roasting gives it an almond-like character.
Pruning and problems
Prune in autumn or winter, and keep it light – take out dead and weak branches rather than trying to reshape the tree.
Watch for:
- Aphids – on the tree and also attacking the fruit.
- Ants – usually a sign that aphids are being farmed.
- Termites.
Beyond pests, the two practical risks are wind damage in the early years and any exposure to cold, neither of which the tree tolerates.
For the full plant profile see our Pulasan growing page.
