Plant care
Coffee Planttemperature & humidity
Coffea arabica
More about coffee plant
Ideal temperature for coffee plant
Temperature kills fewer coffee plant 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 18-27°C (65-80°F) is fine; the spot you put the plant in matters more. Below roughly 18°C the damage starts — soft blackened patches, translucent leaves, sometimes overnight.
Cold tolerance & winter care
Coffee Plant is frost-tender (USDA 10-11, RHS H1a (min 15°C; greenhouse or indoors year-round in the UK)). 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 coffee plant
Coffee Plant sits happiest at around 50-70% relative humidity. As a tropical understorey plant, coffee craves moderate to high humidity and dislikes dry, draughty rooms where leaf tips brown and crisp. Stand the pot on a damp pebble tray, group it with other plants, or run a humidifier near radiators in winter. Mist with care, as persistently wet foliage can encourage fungal spotting. 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.
Coffee Plant temperature & humidity — frequently asked questions
What temperature is best for coffee plant?
Coffee Plant grows best between 18-27°C (65-80°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 coffee plant tolerate?
Coffee Plant 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 coffee plant need?
Coffee Plant prefers about 50-70% relative humidity. As a tropical understorey plant, coffee craves moderate to high humidity and dislikes dry, draughty rooms where leaf tips brown and crisp. Stand the pot on a damp pebble tray, group it with other plants, or run a humidifier near radiators in winter. Mist with care, as persistently wet foliage can encourage fungal spotting.
How do I raise humidity for coffee plant?
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 coffee plant live outside?
Coffee Plant is rated for USDA zone 10-11 and RHS hardiness H1a (min 15°C; greenhouse or indoors year-round in the UK). Outside that range it must come indoors before the first frost — treat any outdoor stint as a summer holiday, not a permanent home.
More coffee plant care
In the UK? Keeping coffee plant warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full coffee plant care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.