Guanacaste Tree (Enterolobium cyclocarpum)

Guanacaste Tree

Enterolobium cyclocarpum

Its broad, umbrella-like canopy shelters like a living sunshade. Large deciduous tree; common names: Guanacaste Tree, Elephant Ear Tree.

Full sun
1–2/week
Moderate
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Plant Needs

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Sunlight Requires full sun for mature growth; young saplings tolerate partial shade to avoid scorching
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Watering Deep, infrequent watering once established; drought-tolerant when mature, with reduced need for supplemental water
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Temperature Thrives in warm tropical to subtropical climates; sensitive to frost, with damage occurring below 10°C
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Characteristics

  • Leaf: Bipinnate compound leaves with small oval leaflets that fold upward at night to reduce water loss.
  • Flower: Fragrant, pale pink to white spherical flower heads clustered at branch tips.
  • Fruit: Curved, woody seed pods resembling elephant ears, containing several large seeds.
  • Stem/Bark: Thick, gray-brown trunk with shallow fissured bark; sturdy, wide-spreading branches forming an umbrella shape.
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Care Guide

Watering

Deep watering every 7–10 days during active growth; avoid waterlogging

Fertilization

Apply slow-release balanced fertilizer once at budding. Avoid over-fertilization to prevent excessive foliage growth at the expense of canopy structure

Banana peel compost tea:Compost banana peels for 2 weeks, steep in water for 24 hours, dilute 1:20 with water for root drenching; avoid applying directly to foliage
Pruning
  • Remove dead, damaged, or crossing branches in late winter to maintain canopy health and shape.
  • Trim lower branches as the tree matures to clear ground space and improve air circulation.
  • Avoid heavy pruning, as the tree has a naturally spreading, umbrella-like growth habit.
  • Remove fallen seed pods periodically to reduce litter in landscaped areas.
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: No listed toxicity to cats

Humans: No documented toxicity to humans; seeds are non-toxic if processed properly

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Garden Uses & Culture

Culture: National tree of Costa Rica; symbolizes community, strength, and shelter in Central American cultures

Usage: Large shade tree for parks and large landscapes; durable wood used for furniture and construction