Plant care
Wilmot's Dinteranthustemperature & humidity
Dinteranthus wilmotianus
More about wilmot's dinteranthus
Ideal temperature for wilmot's dinteranthus
Temperature kills fewer wilmot's dinteranthus 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 8–35°C (46–95°F) is fine; the spot you put the plant in matters more. Below roughly 8°C the damage starts — soft blackened patches, translucent leaves, sometimes overnight.
Cold tolerance & winter care
Wilmot's Dinteranthus is frost-tender (USDA 10–11 (indoor-only in virtually all climates), 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 wilmot's dinteranthus
Wilmot's Dinteranthus sits happiest at around 15–35% relative humidity. Requires extremely dry conditions, even drier than most succulents. High humidity during dormancy is fatal. Good ventilation is critical. 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.
Wilmot's Dinteranthus temperature & humidity — frequently asked questions
What temperature is best for wilmot's dinteranthus?
Wilmot's Dinteranthus grows best between 8–35°C (46–95°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 wilmot's dinteranthus tolerate?
Wilmot's Dinteranthus starts to suffer below roughly 8°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 wilmot's dinteranthus need?
Wilmot's Dinteranthus prefers about 15–35% relative humidity. Requires extremely dry conditions, even drier than most succulents. High humidity during dormancy is fatal. Good ventilation is critical.
How do I raise humidity for wilmot's dinteranthus?
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 wilmot's dinteranthus live outside?
Wilmot's Dinteranthus is rated for USDA zone 10–11 (indoor-only in virtually all climates) 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 wilmot's dinteranthus care
In the UK? Keeping wilmot's dinteranthus warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full wilmot's dinteranthus care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.