Plant care
Cloudberrytemperature & humidity
Rubus chamaemorus
More about cloudberry
Ideal temperature for cloudberry
Cloudberry is comfortable in any room a person is comfortable in, roughly Extremely cold-hardy to about -40°C; needs cool summers below ~24°C (Extremely cold-hardy to about -40°F; needs cool summers below ~75°F). The mistakes are micro-climates: a north-facing window on a frosty night, a south-facing windowsill in a summer heatwave, the standing draught between an opened kitchen door and the radiator behind it. Read the room around the plant, not the thermostat. Below roughly -40°C growth pauses; cold beyond that pushes it into dormancy rather than killing it outright.
Cold tolerance & winter care
Cloudberry is comparatively hardy (USDA 2-7 (outdoor; needs cool summers), RHS H7). Within that range it tolerates a cold dormant spell outdoors; outside it, grow it in a container you can move under cover or overwinter in a cool but frost-free spot. Hardiness assumes an established plant in well-drained soil — a wet, cold root zone kills far more plants than cold air alone.
Humidity for cloudberry
Cloudberry sits happiest at around Outdoor ambient, high relative humidity. An outdoor plant suited to cool, humid northern climates. It struggles in dry heat; consistent atmospheric and soil moisture matter far more than any indoor target. 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.
Cloudberry temperature & humidity — frequently asked questions
What temperature is best for cloudberry?
Cloudberry grows best between Extremely cold-hardy to about -40°C; needs cool summers below ~24°C (Extremely cold-hardy to about -40°F; needs cool summers below ~75°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 cloudberry tolerate?
Cloudberry starts to suffer below roughly -40°C. It tolerates a cold dormant period within USDA 2-7 (outdoor; needs cool summers), but a wet cold root zone is more dangerous than cold air.
What humidity does cloudberry need?
Cloudberry prefers about Outdoor ambient, high relative humidity. An outdoor plant suited to cool, humid northern climates. It struggles in dry heat; consistent atmospheric and soil moisture matter far more than any indoor target.
How do I raise humidity for cloudberry?
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 cloudberry live outside?
Cloudberry is rated for USDA zone 2-7 (outdoor; needs cool summers) and RHS hardiness H7. Within that range it can stay outdoors; outside it, grow it in a moveable container and protect the roots from a wet, cold winter.
More cloudberry care
In the UK? Keeping cloudberry warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full cloudberry care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.