Plant care
Ice Cream Beantemperature & humidity
Inga edulis
More about ice cream bean
Ideal temperature for ice cream bean
Aim for 18–32°C (64–90°F) 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
Ice Cream Bean is frost-tender (USDA 9b–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 ice cream bean
Ice Cream Bean sits happiest at around 60–90% relative humidity. Thrives in the humid tropics but adapts reasonably well to moderate-humidity subtropical conditions. In arid environments it benefits from mulching and supplemental irrigation. Mature trees are more resilient to humidity fluctuations than juveniles. 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.
Ice Cream Bean temperature & humidity — frequently asked questions
What temperature is best for ice cream bean?
Ice Cream Bean grows best between 18–32°C (64–90°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 ice cream bean tolerate?
Ice Cream Bean 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 ice cream bean need?
Ice Cream Bean prefers about 60–90% relative humidity. Thrives in the humid tropics but adapts reasonably well to moderate-humidity subtropical conditions. In arid environments it benefits from mulching and supplemental irrigation. Mature trees are more resilient to humidity fluctuations than juveniles.
How do I raise humidity for ice cream bean?
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 ice cream bean live outside?
Ice Cream Bean is rated for USDA zone 9b–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 ice cream bean care
In the UK? Keeping ice cream bean warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full ice cream bean care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.