Plant care
Jewel Strawberrytemperature & humidity
Fragaria × ananassa 'Jewel'
More about jewel strawberry
Ideal temperature for jewel strawberry
Jewel Strawberry is comfortable in any room a person is comfortable in, roughly -20–28°C (chill requirement 200–400 hours below 7°C; optimal fruiting 15–22°C) (-4–82°F (optimal fruiting 59–72°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 -20°C growth pauses; cold beyond that pushes it into dormancy rather than killing it outright.
Cold tolerance & winter care
Jewel Strawberry is comparatively hardy (USDA 4–8, RHS H6). 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 jewel strawberry
Jewel Strawberry sits happiest at around 50–75% relative humidity. Tolerates the moderate-to-high humidity of temperate climates. Space plants 35–40 cm apart for airflow and remove the first year's runners to strengthen crowns. Good ventilation reduces Botrytis during the harvest window. 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.
Jewel Strawberry temperature & humidity — frequently asked questions
What temperature is best for jewel strawberry?
Jewel Strawberry grows best between -20–28°C (chill requirement 200–400 hours below 7°C; optimal fruiting 15–22°C) (-4–82°F (optimal fruiting 59–72°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 jewel strawberry tolerate?
Jewel Strawberry starts to suffer below roughly -20°C. It tolerates a cold dormant period within USDA 4–8, but a wet cold root zone is more dangerous than cold air.
What humidity does jewel strawberry need?
Jewel Strawberry prefers about 50–75% relative humidity. Tolerates the moderate-to-high humidity of temperate climates. Space plants 35–40 cm apart for airflow and remove the first year's runners to strengthen crowns. Good ventilation reduces Botrytis during the harvest window.
How do I raise humidity for jewel strawberry?
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 jewel strawberry live outside?
Jewel Strawberry is rated for USDA zone 4–8 and RHS hardiness H6. 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 jewel strawberry care
In the UK? Keeping jewel strawberry warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full jewel strawberry care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.