Plant care
Spanish Drabatemperature & humidity
Draba hispanica
More about spanish draba
Ideal temperature for spanish draba
Aim for -15°C to 22°C (5°F to 72°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 -15°C growth pauses; cold beyond that pushes it into dormancy rather than killing it outright.
Cold tolerance & winter care
Spanish Draba is comparatively hardy (USDA 4–7, 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 spanish draba
Spanish Draba sits happiest at around Low, 20–40% RH relative humidity. Thrives in the dry, crisp conditions of mountain habitats. High humidity, especially combined with poor air circulation, encourages fungal crown rot. Grow in open, well-ventilated positions. 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.
Spanish Draba temperature & humidity — frequently asked questions
What temperature is best for spanish draba?
Spanish Draba grows best between -15°C to 22°C (5°F to 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 spanish draba tolerate?
Spanish Draba starts to suffer below roughly -15°C. It tolerates a cold dormant period within USDA 4–7, but a wet cold root zone is more dangerous than cold air.
What humidity does spanish draba need?
Spanish Draba prefers about Low, 20–40% RH relative humidity. Thrives in the dry, crisp conditions of mountain habitats. High humidity, especially combined with poor air circulation, encourages fungal crown rot. Grow in open, well-ventilated positions.
How do I raise humidity for spanish 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 spanish draba live outside?
Spanish Draba is rated for USDA zone 4–7 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 spanish draba care
In the UK? Keeping spanish 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 spanish draba care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.