Plant care
Zantedeschia 'Hot Chocolate'temperature & humidity
Zantedeschia 'Hot Chocolate'
More about zantedeschia 'hot chocolate'
Ideal temperature for zantedeschia 'hot chocolate'
Temperature kills fewer zantedeschia 'hot chocolate' 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 15-24°C (60-75°F) is fine; the spot you put the plant in matters more. Below roughly 15°C growth pauses; cold beyond that pushes it into dormancy rather than killing it outright.
Cold tolerance & winter care
Zantedeschia 'Hot Chocolate' is comparatively hardy (USDA 8-10 (lift and store below zone 8), 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 zantedeschia 'hot chocolate'
Zantedeschia 'Hot Chocolate' sits happiest at around 40-60% relative humidity. Happy in average humidity. Prioritise good air circulation over misting, which helps reduce fungal leaf spotting and soft rot in these hybrid callas. 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.
Zantedeschia 'Hot Chocolate' temperature & humidity — frequently asked questions
What temperature is best for zantedeschia 'hot chocolate'?
Zantedeschia 'Hot Chocolate' grows best between 15-24°C (60-75°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 zantedeschia 'hot chocolate' tolerate?
Zantedeschia 'Hot Chocolate' starts to suffer below roughly 15°C. It tolerates a cold dormant period within USDA 8-10 (lift and store below zone 8), but a wet cold root zone is more dangerous than cold air.
What humidity does zantedeschia 'hot chocolate' need?
Zantedeschia 'Hot Chocolate' prefers about 40-60% relative humidity. Happy in average humidity. Prioritise good air circulation over misting, which helps reduce fungal leaf spotting and soft rot in these hybrid callas.
How do I raise humidity for zantedeschia 'hot chocolate'?
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 zantedeschia 'hot chocolate' live outside?
Zantedeschia 'Hot Chocolate' is rated for USDA zone 8-10 (lift and store below zone 8) 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 zantedeschia 'hot chocolate' care
In the UK? Keeping zantedeschia 'hot chocolate' warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full zantedeschia 'hot chocolate' care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.