Wiliwili Tree (Erythrina sandwicensis)

Wiliwili Tree

Erythrina sandwicensis

It blooms fiery orange flowers like tropical torches. Deciduous drought-tolerant tree; common name: Wiliwili Tree.

Full sun
1–2/week
Moderate
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Plant Needs

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Sunlight Full sun to partial shade; tolerates intense tropical sunlight but benefits from light afternoon shade in extreme heat
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Watering Drought-tolerant; water deeply but infrequently, allowing the top 15–20 cm of soil to dry completely between waterings
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Temperature Thrives in warm tropical and subtropical temperatures; sensitive to frost, with damage occurring below 10°C
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Characteristics

  • Leaf: Trifoliate, glossy bright green leaflets with rounded tips; drops foliage during dry seasons
  • Flower: Dense clusters of pea-like orange-red flowers, 3–4 cm long, attractive to native pollinators
  • Stem/Bark: Young trunks have sharp, curved spines; mature bark is gray, smooth to slightly fissured
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Care Guide

Watering

Water deeply every 7–10 days; reduce frequency during prolonged dry dormancy periods

Fertilization

Apply diluted balanced fertilizer every 4 weeks during active growth. Use a low-nitrogen fertilizer to promote flowering rather than excessive foliage growth

Composted banana peel tea:Soak fully composted banana peels in water for 24 hours, dilute the mixture 1:20 with water, and apply as a root drench; avoid using raw peels to prevent pest infestations
Pruning
  • Remove dead, damaged, or diseased branches in late winter before new spring growth emerges
  • Thin crowded inner branches to improve airflow and reduce fungal disease risk
  • Trim back overgrown limbs to maintain a compact, desired shape; avoid heavy pruning during dormancy
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; ingestion may cause vomiting, diarrhea, lethargy, and tremors

Humans: Contains erythrina alkaloids; ingestion of seeds or foliage causes nausea, vomiting, and abdominal pain

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Garden Uses & Culture

Culture: Sacred in Hawaiian culture; used traditionally for canoe lashings, lei making, and ceremonial decorations

Usage: Ornamental landscape tree; nectar source for native Hawaiian pollinators like honeycreepers