Plant care
Lords-and-Ladiestemperature & humidity
Arum maculatum
More about lords-and-ladies
Ideal temperature for lords-and-ladies
Aim for -15–25°C (5–77°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
Lords-and-Ladies is comparatively hardy (USDA 6-9, 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 lords-and-ladies
Lords-and-Ladies sits happiest at around 50–80% relative humidity. Adapted to the moderately humid conditions of temperate European woodland. Average household or garden humidity is fine. Does not require misting; avoid excessively dry, hot 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.
Lords-and-Ladies temperature & humidity — frequently asked questions
What temperature is best for lords-and-ladies?
Lords-and-Ladies grows best between -15–25°C (5–77°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 lords-and-ladies tolerate?
Lords-and-Ladies starts to suffer below roughly -15°C. It tolerates a cold dormant period within USDA 6-9, but a wet cold root zone is more dangerous than cold air.
What humidity does lords-and-ladies need?
Lords-and-Ladies prefers about 50–80% relative humidity. Adapted to the moderately humid conditions of temperate European woodland. Average household or garden humidity is fine. Does not require misting; avoid excessively dry, hot positions.
How do I raise humidity for lords-and-ladies?
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 lords-and-ladies live outside?
Lords-and-Ladies is rated for USDA zone 6-9 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 lords-and-ladies care
In the UK? Keeping lords-and-ladies warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full lords-and-ladies care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.