Bogbean
Menyanthes trifoliata · Menyanthaceae
The gardener's calendar
Ideal time to plant bogbean: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Foliage
- Deciduous
- Flowering
- April to June, white or pink flowers
- Adult size
- 20 to 30 cm in height
- Growth
- Moderate
- Hardiness
- Very hardy (down to -20°C)
- Natural habitat
- Peatbogs, marshes, wetlands of Northern Europe
- Soil type
- Acidic, moist, rich in organic matter
Care
Watering
The bogbean is a wetland plant that requires constantly wet or submerged soil. Keep the substrate very moist throughout the year without letting it dry out. In a pond or in a pot in a saucer filled with water, the plant thrives without excessive handling.
Light exposure
Choose a partially shaded to sunny location. The plant tolerates partial shade well, even light shade in warm climates. In very sunny areas, maintain impeccable moisture to avoid any stress.
Soil
Acidic, peaty soil or substrate rich in organic matter is ideal. Enrich the substrate with peat or well-decomposed compost. Avoid chalky or overly draining soils that compromise growth.
Fertilizer
Fertilizer is generally unnecessary in naturally rich environments. A light application in spring is sufficient if the soil lacks fertility. Prefer a diluted balanced fertilizer to avoid overloading the environment.
Pruning and cleanup
No formal pruning is required. Simply remove dead or damaged leaves as needed. In late autumn, cleaning up declining parts prepares the plant for winter dormancy.
Diseases and pests
The plant is generally resistant to diseases if moisture conditions are respected. Watch for rot if water stagnates too long without circulation. Good aeration and regular hygiene prevent fungal problems.
Did you know?
Bogbean was once used in the folk medicine of Nordic and Celtic regions for its supposed tonic properties. Its floating roots make it a fascinating aquatic plant, capable of colonizing peatbogs and marshes where few other species thrive: it plays a major ecological role in these fragile ecosystems.
Where to buy it
Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.
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Tips generated and checked by Viridia — adapt them to your local climate.