Rambutan.

At a glance

Care level

Difficult

Plant type

Tropical fruit tree

Light

Full sun

Indoor light

Direct sun

Water

Every 2 to 4 days

Mature size

60 feet

Growth rate

Medium

Hardiness

USDA 11 to 12

Bloom time

Late spring to early summer

Care

Keep your tree in a consistently warm and humid environment to mimic its native tropical home. Watch for yellowing leaves, which often signal that the soil is too dry or the air lacks enough moisture. Protect the tree from any frost, as it is very sensitive to cold temperatures.

Watering

Keep the soil consistently moist but never waterlogged.

Feeding

Use a balanced fertilizer during the active growing season.

Pruning

Prune lightly after harvest to maintain shape and encourage airflow.

Repotting

Repot only when the tree is young and clearly root bound.

Soil

Deep, rich, well-draining loam

Soil pH

4.5 to 6.5

Temperature

15 to 35°C

Humidity

70 to 90%

Drought tolerance

Low

Lifespan

Perennial, typically 50 to 100 years

Fragrance

Light

Deer and rabbits

Moderate

Safety

People

The raw seeds are considered toxic if ingested in large quantities.

Children

The fruit contains a large, hard seed that poses a significant choking hazard to small children.

Contact allergens

The leaves and stems are generally non-irritating, but some individuals may experience mild contact dermatitis.

Airborne allergens

Pollen can trigger mild allergic reactions in sensitive individuals during the flowering season.

Edibility

The seed inside the fruit should not be consumed raw as it contains saponins.

How to identify it

• Bright red, hairy fruit skin
• Glossy, dark green pinnate leaves
• Small, inconspicuous greenish white flowers
• Spreading, evergreen canopy

Height

12 to 25m

Spread

8 to 15m

Leaves

dark green, evergreen

Flowers

yellowish green, 0.3 to 0.5cm

Fruit

red, yellow, Late summer to early autumn

Problems to watch for

• Fruit BorerCommon
• Powdery MildewCommon
• Root RotUncommon
• Scale InsectsUncommon

Growing it

Propagation

seed, air layering, budding

When to plant

spring, early summer

Overwintering

Protect from any temperatures below 10 degrees Celsius, as the tree is highly sensitive to cold.

In containers

Not suitable for long term container growth due to its large size.

Plant in a sheltered area to protect the canopy from strong winds.

Grows well with

• Banana · They share similar tropical moisture and soil requirements.
• Papaya · It provides light shade for young rambutan trees.

Similar species

• Lychee · It is a closely related fruit tree with similar growth habits.
• Longan · It belongs to the same family and shares similar cultural needs.

Science

Family

Sapindaceae

Genus

Nephelium

Order

Sapindales

Class

Magnoliopsida

Native range

Southeast Asia

Conservation

This species is widely cultivated and not considered threatened in its native range.

It thrives in tropical rainforest climates with consistent rainfall and high temperatures.

Value to wildlife

nectar source

Pollinators

bees, butterflies

Uses

culinary fruit, ornamental shade tree

Taxonomy resolved against GBIF.

Questions people ask

Can I grow a rambutan in a pot?

It is very difficult due to the tree's massive size and high humidity requirements.

How long until a tree bears fruit?

Trees grown from seed typically take 5 to 7 years to produce fruit.

Where the name comes from

Nephelium is derived from the Greek word nephele, meaning cloud, while lappaceum comes from the Latin word for burdock, describing the hairy fruit.

Good to know

• Rambutan trees can live for over 100 years.
• The fruit is closely related to the lychee and longan.
• Trees are often dioecious, meaning male and female flowers grow on separate trees.
• The fruit is rich in vitamin C and iron.