Rambutan (Nephelium lappaceum)

Rambutan

Nephelium lappaceum

Juicy, hairy fruits hang like ruby lanterns. Tropical evergreen fruit tree; common name: rambutan.

Full sun
2–3/week
Moderate
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Plant Needs

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Sunlight Requires full direct sunlight for optimal fruit production; juvenile saplings tolerate partial shade to avoid leaf scorch
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Watering Keep soil consistently moist during growing and fruiting seasons; avoid waterlogging to prevent root rot
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Temperature Thrives in warm tropical climates; cannot tolerate temperatures below 10°C, which causes leaf drop and stunted growth
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Characteristics

  • Leaf: Pinnately compound, glossy dark green leaves with 3–11 oval leaflets per stem
  • Flower: Small, creamy-white, fragrant clustered inflorescences at branch tips
  • Fruit: Oval, spiky red/yellow skin enclosing translucent sweet flesh with a single large, brown seed
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Care Guide

Watering

Maintain consistent soil moisture; apply mulch to retain soil moisture and suppress weeds

Fertilization

Apply balanced organic fertilizer every 2 months to support new growth. Avoid over-fertilizing, which can cause excessive leaf growth at the expense of fruiting

Banana peel compost tea:Compost banana peels fully to break down saponins; dilute 1:20 with water for root drench to support fruiting health; avoid raw peels to prevent pest infestations
Pruning
  • Prune dead, diseased, or crossing branches annually after fruiting to improve air circulation
  • Thin overcrowded canopy branches to allow sunlight to reach inner foliage and support uniform fruiting
  • Trim lower branches to maintain a clear trunk for easier fruit harvesting and maintenance
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Seeds contain saponins, may cause vomiting, diarrhea, and abdominal discomfort

Humans: Seeds contain saponins; ingestion causes mild gastrointestinal upset

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Garden Uses & Culture

Culture: Symbolizes prosperity and abundance in traditional Southeast Asian festivals

Usage: Edible fruit production; ornamental shade tree for tropical landscapes