Plant care
Hairy-fruited Drabatemperature & humidity
Draba lasiocarpa
More about hairy-fruited draba
Ideal temperature for hairy-fruited draba
Temperature kills fewer hairy-fruited draba 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 -18–22°C (-0.4–72°F) is fine; the spot you put the plant in matters more. Below roughly -18°C growth pauses; cold beyond that pushes it into dormancy rather than killing it outright.
Cold tolerance & winter care
Hairy-fruited Draba is comparatively hardy (USDA 4–8, 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 hairy-fruited draba
Hairy-fruited Draba sits happiest at around 25–55% relative humidity. Low to moderate humidity with excellent ventilation is required. The hairy leaf and pod surfaces are prone to fungal issues in persistently humid or stagnant air. Open, well-ventilated positions or an alpine house are best. 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.
Hairy-fruited Draba temperature & humidity — frequently asked questions
What temperature is best for hairy-fruited draba?
Hairy-fruited Draba grows best between -18–22°C (-0.4–72°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 hairy-fruited draba tolerate?
Hairy-fruited Draba starts to suffer below roughly -18°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 hairy-fruited draba need?
Hairy-fruited Draba prefers about 25–55% relative humidity. Low to moderate humidity with excellent ventilation is required. The hairy leaf and pod surfaces are prone to fungal issues in persistently humid or stagnant air. Open, well-ventilated positions or an alpine house are best.
How do I raise humidity for hairy-fruited draba?
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 hairy-fruited draba live outside?
Hairy-fruited Draba is rated for USDA zone 4–8 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 hairy-fruited draba care
In the UK? Keeping hairy-fruited draba warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full hairy-fruited draba care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.