Plant care
White Konjactemperature & humidity
Amorphophallus albus
More about white konjac
Ideal temperature for white konjac
Aim for 18–28°C growing; store corms above 5°C in dormancy (64–82°F growing; store corms above 41°F in dormancy) 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
White Konjac is frost-tender (USDA 8-11, RHS H2). 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 white konjac
White Konjac sits happiest at around 60–80% relative humidity. Appreciates moderately high humidity during the growing season, reflecting its subtropical Chinese woodland origin. Mist lightly or place on a pebble tray if grown indoors. Humidity matters less during winter dormancy. 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.
White Konjac temperature & humidity — frequently asked questions
What temperature is best for white konjac?
White Konjac grows best between 18–28°C growing; store corms above 5°C in dormancy (64–82°F growing; store corms above 41°F in dormancy). 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 white konjac tolerate?
White Konjac 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 white konjac need?
White Konjac prefers about 60–80% relative humidity. Appreciates moderately high humidity during the growing season, reflecting its subtropical Chinese woodland origin. Mist lightly or place on a pebble tray if grown indoors. Humidity matters less during winter dormancy.
How do I raise humidity for white konjac?
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 white konjac live outside?
White Konjac is rated for USDA zone 8-11 and RHS hardiness H2. Outside that range it must come indoors before the first frost — treat any outdoor stint as a summer holiday, not a permanent home.
More white konjac care
In the UK? Keeping white konjac warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full white konjac care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.