Plant care
Glossostigma elatinoidestemperature & humidity
Glossostigma elatinoides
More about glossostigma elatinoides
Ideal temperature for glossostigma elatinoides
Glossostigma elatinoides is comfortable in any room a person is comfortable in, roughly 20-26°C (68-79°F). 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 20°C growth pauses; cold beyond that pushes it into dormancy rather than killing it outright.
Cold tolerance & winter care
Glossostigma elatinoides is comparatively hardy (USDA Subtropical aquarium plant; not frost-hardy, kept in heated aquaria, 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 glossostigma elatinoides
Glossostigma elatinoides sits happiest at around 100% (submersed) relative humidity. Humidity is irrelevant submersed. The emersed nursery form needs saturated humidity until it transitions to underwater growth in the tank. 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.
Glossostigma elatinoides temperature & humidity — frequently asked questions
What temperature is best for glossostigma elatinoides?
Glossostigma elatinoides grows best between 20-26°C (68-79°F). 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 glossostigma elatinoides tolerate?
Glossostigma elatinoides starts to suffer below roughly 20°C. It tolerates a cold dormant period within USDA Subtropical aquarium plant; not frost-hardy, kept in heated aquaria, but a wet cold root zone is more dangerous than cold air.
What humidity does glossostigma elatinoides need?
Glossostigma elatinoides prefers about 100% (submersed) relative humidity. Humidity is irrelevant submersed. The emersed nursery form needs saturated humidity until it transitions to underwater growth in the tank.
How do I raise humidity for glossostigma elatinoides?
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 glossostigma elatinoides live outside?
Glossostigma elatinoides is rated for USDA zone Subtropical aquarium plant; not frost-hardy, kept in heated aquaria. 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 glossostigma elatinoides care
In the UK? Keeping glossostigma elatinoides warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full glossostigma elatinoides care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.