Plant care
Chrysanthemum 'Snowdon'temperature & humidity
Chrysanthemum 'Snowdon'
More about chrysanthemum 'snowdon'
Ideal temperature for chrysanthemum 'snowdon'
Temperature kills fewer chrysanthemum 'snowdon' 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 4-22°C (39-72°F) is fine; the spot you put the plant in matters more. Below roughly 4°C growth pauses; cold beyond that pushes it into dormancy rather than killing it outright.
Cold tolerance & winter care
Chrysanthemum 'Snowdon' is comparatively hardy (USDA 5-9, 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 chrysanthemum 'snowdon'
Chrysanthemum 'Snowdon' sits happiest at around 40-60% relative humidity. Ambient outdoor humidity is generally fine. White flowers are particularly susceptible to brown spotting from botrytis in humid, still conditions — space plants 40-50 cm apart and site in an open, airy position. 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.
Chrysanthemum 'Snowdon' temperature & humidity — frequently asked questions
What temperature is best for chrysanthemum 'snowdon'?
Chrysanthemum 'Snowdon' grows best between 4-22°C (39-72°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 chrysanthemum 'snowdon' tolerate?
Chrysanthemum 'Snowdon' starts to suffer below roughly 4°C. It tolerates a cold dormant period within USDA 5-9, but a wet cold root zone is more dangerous than cold air.
What humidity does chrysanthemum 'snowdon' need?
Chrysanthemum 'Snowdon' prefers about 40-60% relative humidity. Ambient outdoor humidity is generally fine. White flowers are particularly susceptible to brown spotting from botrytis in humid, still conditions — space plants 40-50 cm apart and site in an open, airy position.
How do I raise humidity for chrysanthemum 'snowdon'?
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 chrysanthemum 'snowdon' live outside?
Chrysanthemum 'Snowdon' is rated for USDA zone 5-9 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 chrysanthemum 'snowdon' care
In the UK? Keeping chrysanthemum 'snowdon' warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full chrysanthemum 'snowdon' care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.