Plant care
African Star Appletemperature & humidity
Chrysophyllum africanum
More about african star apple
Ideal temperature for african star apple
Aim for 18–35 °C (64–95 °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
African Star Apple is frost-tender (USDA 11–12, RHS H1a). 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 african star apple
African Star Apple sits happiest at around 65–90% RH relative humidity. A true tropical species requiring high ambient humidity year-round, consistent with its native lowland rainforest environment. In cultivation outside tropical Africa, provide supplemental humidity via irrigation or situate near water bodies. Not suited to dry or semi-arid climates. 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.
African Star Apple temperature & humidity — frequently asked questions
What temperature is best for african star apple?
African Star Apple grows best between 18–35 °C (64–95 °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 african star apple tolerate?
African Star Apple 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 african star apple need?
African Star Apple prefers about 65–90% RH relative humidity. A true tropical species requiring high ambient humidity year-round, consistent with its native lowland rainforest environment. In cultivation outside tropical Africa, provide supplemental humidity via irrigation or situate near water bodies. Not suited to dry or semi-arid climates.
How do I raise humidity for african star apple?
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 african star apple live outside?
African Star Apple is rated for USDA zone 11–12 and RHS hardiness H1a. Outside that range it must come indoors before the first frost — treat any outdoor stint as a summer holiday, not a permanent home.
More african star apple care
In the UK? Keeping african star apple warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full african star apple care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.