Plant care
Giant Dorsteniatemperature & humidity
Dorstenia gigas
More about giant dorstenia
Ideal temperature for giant dorstenia
Aim for 18–30°C; min 10°C; frost-free at all times (64–86°F; min 50°F; frost-free at all times) on the thermostat and you've handled the easy part. The hard part is the half-metre around the plant: window glass that drops to near-freezing on a January night, a radiator pumping out hot dry air, a draught from an opened front door. Move the plant 30 cm and you've usually fixed the problem. Below roughly 18°C the damage starts — soft blackened patches, translucent leaves, sometimes overnight.
Cold tolerance & winter care
Giant Dorstenia is frost-tender (USDA 10a–11, RHS H1b). 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 giant dorstenia
Giant Dorstenia sits happiest at around 40–65% relative humidity. Unlike most succulents, D. gigas benefits from moderate to moderately high humidity, reflecting the coastal fog and maritime conditions of Socotra. In very dry centrally heated rooms, place the pot on a pebble tray with water or use a room humidifier nearby. Avoid wetting the trunk directly; ambient humidity around the foliage is what matters. 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.
Giant Dorstenia temperature & humidity — frequently asked questions
What temperature is best for giant dorstenia?
Giant Dorstenia grows best between 18–30°C; min 10°C; frost-free at all times (64–86°F; min 50°F; frost-free at all times). 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 giant dorstenia tolerate?
Giant Dorstenia starts to suffer below roughly 18°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 giant dorstenia need?
Giant Dorstenia prefers about 40–65% relative humidity. Unlike most succulents, D. gigas benefits from moderate to moderately high humidity, reflecting the coastal fog and maritime conditions of Socotra. In very dry centrally heated rooms, place the pot on a pebble tray with water or use a room humidifier nearby. Avoid wetting the trunk directly; ambient humidity around the foliage is what matters.
How do I raise humidity for giant dorstenia?
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 giant dorstenia live outside?
Giant Dorstenia is rated for USDA zone 10a–11 and RHS hardiness H1b. Outside that range it must come indoors before the first frost — treat any outdoor stint as a summer holiday, not a permanent home.
More giant dorstenia care
In the UK? Keeping giant dorstenia warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full giant dorstenia care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.