Bladderwort
Utricularia vulgaris · Lentibulariaceae
The gardener's calendar
Ideal time to plant bladderwort: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Family
- Lentibulariaceae
- Type
- Aquatic carnivorous plant
- Blooming
- June to September
- Height
- 10 to 50 cm depending on conditions
- Hardiness
- Hardy (-15°C)
- Origin
- Temperate and boreal zones of Eurasia
- Foliage
- Deciduous, submerged
Care
Water and aquatic environment
The common bladderwort lives entirely submerged in fresh, still or slowly flowing waters. Maintain a water depth of 20 to 50 cm and ensure water rich in minerals for efficient prey capture. Regular water changes prevent the accumulation of pollutants.
Light
Install the plant in sunny to partially shaded areas. Exposure to 4 to 6 hours of direct daily light promotes abundant flowering and vigorous growth. Avoid dense shade, which would slow its development.
Substrate and environment
The bladderwort prefers a substrate rich in organic matter: silt, wet peat, or loam. Place the plant in the most fertile zones of the pond or tank. A slightly acidic to neutral pH (6.5 to 7.5) is optimal for its carnivorous nutrition.
Nutrition
Nutrient enrichment is generally not necessary since the plant captures its prey (small aquatic organisms). In very nutrient-poor waters, a very light application of diluted liquid fertilizer can be beneficial, but be cautious to avoid promoting algae growth.
Maintenance and control
Thin out dense clumps regularly to prevent the plant from smothering other aquatic plants. Remove dead or excessively tangled parts. In autumn, prune lightly to allow for winter dormancy.
Pests and problems
The bladderwort is generally little affected by diseases thanks to its carnivorous feeding mode. Excessive algae can impair its efficiency; regularly clean the trap vesicles. Monitor water quality to prevent rot due to excessive stagnation.
Did you know?
The common bladderwort is one of the most sophisticated carnivorous plants: its tiny trap vesicles (utricles) function like underwater vacuums, capable of closing in less than a millisecond to capture microscopic aquatic organisms. It can thus colonize extremely nutrient-poor waters where few plants could survive.
Where to buy it
Best planted in spring or autumn, away from frost and heatwaves. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September, October.
Add this plant to my garden →Plants from the same family
- Common butterwortPinguicula vulgaris
- Utricularia intermediaUtricularia intermedia
- Utricularia australisUtricularia australis
- Pale butterwortPinguicula lusitanica
- Utricularia gibbaUtricularia gibba
- Horned bladderwortUtricularia cornuta
Tips generated and checked by Viridia — adapt them to your local climate.