Plant care
Pink Calla Lilytemperature & humidity
Zantedeschia rehmannii
More about pink calla lily
Ideal temperature for pink calla lily
Aim for 10–25°C (50–77°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 10°C growth pauses; cold beyond that pushes it into dormancy rather than killing it outright.
Cold tolerance & winter care
Pink Calla Lily is comparatively hardy (USDA 8–10, RHS H3). 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 pink calla lily
Pink Calla Lily sits happiest at around 50–70% relative humidity. Performs well at moderate to moderately high humidity. Average indoor humidity is usually sufficient but avoid very dry, heated rooms in winter (less relevant during dormancy). Improve humidity with a pebble tray if growing in a dry interior environment. 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.
Pink Calla Lily temperature & humidity — frequently asked questions
What temperature is best for pink calla lily?
Pink Calla Lily grows best between 10–25°C (50–77°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 pink calla lily tolerate?
Pink Calla Lily starts to suffer below roughly 10°C. It tolerates a cold dormant period within USDA 8–10, but a wet cold root zone is more dangerous than cold air.
What humidity does pink calla lily need?
Pink Calla Lily prefers about 50–70% relative humidity. Performs well at moderate to moderately high humidity. Average indoor humidity is usually sufficient but avoid very dry, heated rooms in winter (less relevant during dormancy). Improve humidity with a pebble tray if growing in a dry interior environment.
How do I raise humidity for pink calla lily?
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 pink calla lily live outside?
Pink Calla Lily is rated for USDA zone 8–10 and RHS hardiness H3. 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 pink calla lily care
In the UK? Keeping pink calla lily warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full pink calla lily care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.