Laguncularia racemosa
Laguncularia racemosa · Combretaceae
The gardener's calendar
In autumn, ease off feeding and take the chance to clean up around laguncularia racemosa and prepare for winter.
ID card
- Common name
- White mangrove, White mangle
- Foliage
- Evergreen
- Flowering
- Spring to summer, discreet whitish-yellow flowers
- Adult size
- 3 to 8 m in height depending on conditions
- Growth
- Moderate to rapid in tropical climate
- Hardiness
- Very sensitive to cold, tropical and subtropical climate
- Origin
- Tropical coasts of the Americas and West Africa
- Soil type
- Salty, muddy, marshy soils, tolerating waterlogging
Care
Light exposure
Laguncularia racemosa thrives in full sun, an essential condition for its vigorous growth. In tropical climate, a sunny exposure of 6 to 8 hours per day ensures dense branching and good flowering. Indoors in temperate regions, place the plant near a very bright bay window.
Watering and humidity
This species tolerates waterlogging and prefers a constantly moist to wet substrate. In its native climate, it grows with its feet in brackish water. In cultivation, keep the soil moist and don't hesitate to water generously in summer. Reduce slightly in winter if you grow it indoors.
Substrate and drainage
Unlike typical plants, Laguncularia racemosa tolerates saline soils and substrates rich in organic matter very well. Favor a draining mixture with potting soil, peat and possibly a little perlite, while maintaining significant moisture. The plant also adapts to chalky soils.
Fertilization
Apply a balanced fertilizer (NPK 10-10-10) or slightly potassium-rich every 15 to 30 days during the growing season (spring-summer). Indoors in temperate climate, space out applications and stop in winter. Avoid over-fertilization which can weaken the structure.
Pruning and shaping
Prune lightly after flowering to encourage branching and maintain a compact form. Remove dead or poorly oriented branches. In bonsai or pot culture, regular pruning allows you to control the silhouette. This species tolerates pruning well and heals quickly.
Pests and diseases
In cultivation, Laguncularia racemosa can be affected by mealybugs or spider mites in dry conditions. Favor good air circulation and sufficient humidity. Root rot remains rare if drainage and root aeration are adequate. Inspect foliage regularly.
Did you know?
Laguncularia racemosa is a remarkable mangrove that colonizes tropical coastal zones by forming dense and impenetrable forests. Its adventitious and aerial roots stabilize shorelines, protect coasts from erosion and provide refuge for countless aquatic and migratory species. Some coastal populations also use it in phytoremediation practices to clean up brackish waters.
Where to buy it
Best planted in autumn so the roots settle in before summer, or in early spring once the frost has passed. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, October, November.
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Tips generated and checked by Viridia — adapt them to your local climate.