Plant care
Wendt's Water Trumpettemperature & humidity
Cryptocoryne wendtii
More about wendt's water trumpet
Ideal temperature for wendt's water trumpet
Temperature kills fewer wendt's water trumpet plants than you'd think. What kills them is the micro-climate within a normal-temperature room — a leaf pressed against single-glazed winter glass, the hot dry updraft directly above a radiator, the cold blast from an AC vent. The thermostat reading at 22–28°C (72–82°F) is fine; the spot you put the plant in matters more. Below roughly 22°C the damage starts — soft blackened patches, translucent leaves, sometimes overnight.
Cold tolerance & winter care
Wendt's Water Trumpet is frost-tender (USDA 10–12 (aquatic or indoor-only), RHS H1c). It cannot survive a frost, so in most of the US and UK it lives indoors year-round or summers outside and comes back in well before the first autumn frost — once nights drop toward 10-12°C is the cue, not the first frost warning. Acclimate it over a week when moving between indoors and out so the leaves do not shock.
Humidity for wendt's water trumpet
Wendt's Water Trumpet sits happiest at around 80–100% relative humidity. As an aquatic or semi-aquatic species, humidity requirements are very high. In paludarium or emersed setups, maintain near-saturated air humidity. Standard indoor humidity of 40–60% is insufficient without a covered enclosure. 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.
Wendt's Water Trumpet temperature & humidity — frequently asked questions
What temperature is best for wendt's water trumpet?
Wendt's Water Trumpet grows best between 22–28°C (72–82°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 wendt's water trumpet tolerate?
Wendt's Water Trumpet starts to suffer below roughly 22°C. It is frost-tender and will be damaged or killed by a frost, so bring it indoors once nights fall toward 10-12°C.
What humidity does wendt's water trumpet need?
Wendt's Water Trumpet prefers about 80–100% relative humidity. As an aquatic or semi-aquatic species, humidity requirements are very high. In paludarium or emersed setups, maintain near-saturated air humidity. Standard indoor humidity of 40–60% is insufficient without a covered enclosure.
How do I raise humidity for wendt's water trumpet?
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 wendt's water trumpet live outside?
Wendt's Water Trumpet is rated for USDA zone 10–12 (aquatic or indoor-only) and RHS hardiness H1c. Outside that range it must come indoors before the first frost — treat any outdoor stint as a summer holiday, not a permanent home.
More wendt's water trumpet care
In the UK? Keeping wendt's water trumpet warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full wendt's water trumpet care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.