Plant care
True Service Treetemperature & humidity
Sorbus domestica
More about true service tree
Ideal temperature for true service tree
Temperature kills fewer true service tree 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 Hardy to about -20°C; favours warm summers (Hardy to about -4°F; favours warm summers) is fine; the spot you put the plant in matters more. Below roughly -20°C growth pauses; cold beyond that pushes it into dormancy rather than killing it outright.
Cold tolerance & winter care
True Service Tree is comparatively hardy (USDA 5-7 (outdoor; needs summer warmth to fruit), RHS H5). 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 true service tree
True Service Tree sits happiest at around Outdoor ambient relative humidity. An outdoor tree with no humidity requirement; favours the warmer, drier summers of its native continental and Mediterranean range. 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.
True Service Tree temperature & humidity — frequently asked questions
What temperature is best for true service tree?
True Service Tree grows best between Hardy to about -20°C; favours warm summers (Hardy to about -4°F; favours warm summers). 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 true service tree tolerate?
True Service Tree starts to suffer below roughly -20°C. It tolerates a cold dormant period within USDA 5-7 (outdoor; needs summer warmth to fruit), but a wet cold root zone is more dangerous than cold air.
What humidity does true service tree need?
True Service Tree prefers about Outdoor ambient relative humidity. An outdoor tree with no humidity requirement; favours the warmer, drier summers of its native continental and Mediterranean range.
How do I raise humidity for true service tree?
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 true service tree live outside?
True Service Tree is rated for USDA zone 5-7 (outdoor; needs summer warmth to fruit) and RHS hardiness H5. 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 true service tree care
In the UK? Keeping true service tree warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full true service tree care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.