Caribbean Princewood (Exostema caribaeum)

Caribbean Princewood

Exostema caribaeum

Fragrant white blooms glow against glossy evergreen foliage, bringing tropical warmth to coastal gardens. Evergreen flowering tree; common name: Caribbean Princewood.

Full sun
1/week
Moderate
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Plant Needs

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Sunlight Full to partial sun; provide afternoon dappled shade in intensely hot climates to prevent leaf scorch
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Watering Water deeply when the top 5 cm of soil dries out; avoid prolonged waterlogging to prevent root rot
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Temperature Thrives in warm temperate to tropical temperatures; protect from frost below 10°C to avoid leaf damage
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Characteristics

  • Leaf: Opposite, elliptical to oblong, glossy dark green leaves with smooth entire margins
  • Flower: Small, fragrant white tubular flowers arranged in dense terminal clusters
  • Stem/Bark: Slender branching stems with smooth grey-brown mature bark
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Care Guide

Watering

Keep soil consistently moist but not waterlogged during active growth

Fertilization

Apply diluted balanced fertilizer monthly. Avoid over-fertilization to prevent leaf burn

Eggshell powder topdressing:Crush dried eggshells into fine powder, sprinkle lightly on soil surface, and water in to incorporate nutrients without introducing pests or odors
Pruning
  • Remove dead, damaged, or crossing branches in early spring before new growth emerges
  • Thin dense inner foliage to improve air circulation and light penetration
  • Shape young plants to maintain a compact form if grown as a container shrub
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: No listed toxicity to cats

Humans: No documented toxic effects on humans

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental tree for coastal gardens; fragrant flower display for pollinator support