White Mangrove (Laguncularia racemosa)

White Mangrove

Laguncularia racemosa

Salt-tolerant coastal sentinel, its leaves excrete excess salt to thrive in tidal zones. Evergreen mangrove tree; common name: White Mangrove.

Full sun
variable/week
Moderate
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Plant Needs

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Sunlight Full sun to partial shade; tolerates coastal salt spray and windy conditions
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Watering Adapted to periodic tidal saltwater inundation; avoid prolonged freshwaterlogging in cultivated settings
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Temperature Thrives in warm tropical to subtropical temperatures; cannot tolerate frost below 10°C
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Characteristics

  • Leaf: Opposite, elliptical, leathery leaves with salt-excreting glands on undersides
  • Flower: Small, creamy-white, fragrant racemes
  • Stem/Bark: Smooth, grayish-brown bark; lacks prop roots, has pneumatophores for oxygen uptake in waterlogged soil
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Care Guide

Watering

Maintain slightly moist, saline-amended soil in cultivation

Fertilization

Diluted, low-nitrogen feed once monthly. Avoid high-nitrogen fertilizers to prevent excessive foliage growth

Banana peel compost tea:Fully compost banana peels, dilute 1:20 for root drench; avoid over-fertilizing to prevent salt buildup
Pruning
  • Remove dead or damaged branches to maintain airflow and reduce pest risk
  • Trim overgrown stems to control size in cultivated coastal gardens
  • Avoid pruning during high-tide periods to minimize plant stress
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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

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Garden Uses & Culture

Culture: Symbolizes coastal resilience and critical wetland ecosystem protection

Usage: Coastal erosion control; provides habitat for marine life; ornamental in coastal gardens