Plant care
Bladderworttemperature & humidity
Utricularia spp.
More about bladderwort
Ideal temperature for bladderwort
Bladderwort is comfortable in any room a person is comfortable in, roughly 13-29C ideal (tolerates 8-38C) (55-85F ideal (tolerates 46-100F)). The mistakes are micro-climates: a north-facing window on a frosty night, a south-facing windowsill in a summer heatwave, the standing draught between an opened kitchen door and the radiator behind it. Read the room around the plant, not the thermostat. Below roughly 13°C growth pauses; cold beyond that pushes it into dormancy rather than killing it outright.
Cold tolerance & winter care
Bladderwort is comparatively hardy (USDA Varies widely by species; tender tropical/warm-temperate types are grown as houseplants (roughly USDA 9-11 outdoors), while some temperate species are hardier., RHS undefined). Within that range it tolerates a cold dormant spell outdoors; outside it, grow it in a container you can move under cover or overwinter in a cool but frost-free spot. Hardiness assumes an established plant in well-drained soil — a wet, cold root zone kills far more plants than cold air alone.
Humidity for bladderwort
Bladderwort sits happiest at around 50-70% relative humidity. Appreciates moderate to high humidity; the constantly wet tray usually supplies enough. In dry rooms a humidity tray, terrarium, or nearby humidifier prevents leaf tips browning and curling. Most terrestrial species adapt well to average home humidity once the soil stays saturated. The usual low-humidity tell is crisp brown leaf tips and edges while the soil moisture is fine — a sign the air, not the watering, is the problem. If you need to raise it, the reliable methods are grouping plants together, standing the pot on a tray of damp pebbles (the pot above the waterline, never in it), or running a small humidifier in winter when indoor heating dries the air most. Misting is the least effective — it raises humidity for minutes, not hours.
Bladderwort temperature & humidity — frequently asked questions
What temperature is best for bladderwort?
Bladderwort grows best between 13-29C ideal (tolerates 8-38C) (55-85F ideal (tolerates 46-100F)). Keep it out of cold draughts, off freezing windowsills in winter, and away from the hot dry air directly above radiators — the extremes matter far more than the average room temperature.
How cold can bladderwort tolerate?
Bladderwort starts to suffer below roughly 13°C. It tolerates a cold dormant period within USDA Varies widely by species; tender tropical/warm-temperate types are grown as houseplants (roughly USDA 9-11 outdoors), while some temperate species are hardier., but a wet cold root zone is more dangerous than cold air.
What humidity does bladderwort need?
Bladderwort prefers about 50-70% relative humidity. Appreciates moderate to high humidity; the constantly wet tray usually supplies enough. In dry rooms a humidity tray, terrarium, or nearby humidifier prevents leaf tips browning and curling. Most terrestrial species adapt well to average home humidity once the soil stays saturated.
How do I raise humidity for bladderwort?
Group it with other plants, stand the pot on a tray of damp pebbles (kept above the waterline), or run a small humidifier in winter. Misting only helps for a few minutes, so it is the weakest option for a plant that genuinely needs more humidity.
Can bladderwort live outside?
Bladderwort is rated for USDA zone Varies widely by species; tender tropical/warm-temperate types are grown as houseplants (roughly USDA 9-11 outdoors), while some temperate species are hardier.. Within that range it can stay outdoors; outside it, grow it in a moveable container and protect the roots from a wet, cold winter.
More bladderwort care
In the UK? Keeping bladderwort warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full bladderwort care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.