Fruits

How to Plant, Grow, and Care For Rambutan Trees

The rambutan tree is a true tropical that produces some distinctively hairy-looking berries. In this expert guide by gardener Kaleigh Brillon, you'll learn the growing tips you need to grow and harvest these interesting fruits!

If you live in the US....

or Europe, you might be wondering what on earth a rambutan tree is. It’s a heat-loving tropical plant that needs to grow in USDA hardiness zone 10 or higher, so many of you may only be able to buy them online or in specialty farmers’ markets. They’re related to lychees and grow hairy-looking fruits that you peel to reveal sweet flesh that’s a lot like grapes. Yum!

While you may never grow a rambutan tree in your backyard in the majority of the US, you can give it a try in a climate-controlled greenhouse. This tree loves warm weather and lots of humidity, so you’ll need a moist environment for it to grow in or for it to bear fruit.

If you live in the perfect rambutan climate or want to try your luck with some tropical fruits, read the following guide to growing this unique tree.
All About The Rambutan Tree
The rambutan tree (Nephelium lappaceum) originates from southeast Asia and can be found in the coastal lowlands of China, Thailand, Vietnam, and other surrounding countries at sea level. Temperatures under 50°F (10°C) can kill the tree, so it’s no wonder why it’s considered to be so exotic in the US! It has since spread to southern Mexico and Central America, specifically in Costa Rica.

Rambutan fruit is sometimes called hairy lychee because of its similar appearance to lychee. (After all, they are closely-related cousins coming from the Sapindaceae family.) The soft spines create a hairy appearance, but the skin is red, and the flesh is white, just like lychee. The taste is sweet with a bit of a tang, much like grapes or strawberries.

Characteristics
When these trees are grown in the perfect habitat, their spreading crown can range from 32-82 feet tall! Growing them in a medium-sized to small pot in a greenhouse will likely result in a smaller tree, but you’ll still be able to get delicious fruit.

The Malay word rambut translates to hair in English, and the name, Rambutan refers to the hairy appearance of the fruits. These fruits appear after budded trees flower. Flowering occurs on male trees, female trees, or hermaphroditic trees in spring through summer and again in late summer through fall. The flowers are pollinated by ants and bees.

The tree has glossy green leaves with a slightly leathery feel that can sometimes be yellow-green. Although the fruit is typically red and white, the outside can sometimes look orange or yellow, and the inside may occasionally be pale pink.
Uses
After peeling the fruit, they can be eaten raw or cooked and canned in syrup. They’re often extremely sweet and can be enjoyed as a dessert, but they are full of vitamin C. The roots and bark are often used in natural medicine, and the seed oils can be used to make candles and soap. Silk can be dyed green with young tree shoots.

Planting
The easiest way to get a rambutan tree growing is to start from seed indoors in a container. They require TLC from every single seed to transplant, so keeping them in a controlled environment will be the best way to increase your chance of success.

Rambutan seeds are only viable for up to one week after being harvested, so you’ll need to act fast once you get your seed. Remove the fruit from the seed and let it dry completely.

Place the seed in sandy, loamy soil with good drainage. Even though rambutans like humidity and lots of water, there’s still such a thing as too much water, especially when they’re young.
Cover the seed with a light layer of soil and water it well. Make sure the soil stays moist but not wet, and keep the seed under a grow light. It can take 10-21 days for it to sprout, so don’t worry if it takes a while.

Once the tree sprouts, keep it indoors with moist soil and lots of light. It won’t be ready to move outside until it’s about 1 foot tall in about 2 years and won’t produce fruit until it’s 4 or 5 years old.

You can plant the seed any time of year if you’re growing it indoors, and when it’s time to transplant, you can do so in early spring.