Plant care
Geranium sylvaticum 'Mayflower'temperature & humidity
Geranium sylvaticum 'Mayflower'
More about geranium sylvaticum 'mayflower'
Ideal temperature for geranium sylvaticum 'mayflower'
Temperature kills fewer geranium sylvaticum 'mayflower' 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 -30 to 24°C (-22 to 75°F) is fine; the spot you put the plant in matters more. Below roughly -30°C growth pauses; cold beyond that pushes it into dormancy rather than killing it outright.
Cold tolerance & winter care
Geranium sylvaticum 'Mayflower' is comparatively hardy (USDA 3-8 (outdoor perennial), RHS H7). 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 geranium sylvaticum 'mayflower'
Geranium sylvaticum 'Mayflower' sits happiest at around Outdoor ambient relative humidity. Fully hardy outdoor perennial with no special humidity needs; well suited to cool, moist temperate climates including the UK. 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.
Geranium sylvaticum 'Mayflower' temperature & humidity — frequently asked questions
What temperature is best for geranium sylvaticum 'mayflower'?
Geranium sylvaticum 'Mayflower' grows best between -30 to 24°C (-22 to 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 geranium sylvaticum 'mayflower' tolerate?
Geranium sylvaticum 'Mayflower' starts to suffer below roughly -30°C. It tolerates a cold dormant period within USDA 3-8 (outdoor perennial), but a wet cold root zone is more dangerous than cold air.
What humidity does geranium sylvaticum 'mayflower' need?
Geranium sylvaticum 'Mayflower' prefers about Outdoor ambient relative humidity. Fully hardy outdoor perennial with no special humidity needs; well suited to cool, moist temperate climates including the UK.
How do I raise humidity for geranium sylvaticum 'mayflower'?
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 geranium sylvaticum 'mayflower' live outside?
Geranium sylvaticum 'Mayflower' is rated for USDA zone 3-8 (outdoor perennial) and RHS hardiness H7. 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 geranium sylvaticum 'mayflower' care
In the UK? Keeping geranium sylvaticum 'mayflower' warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full geranium sylvaticum 'mayflower' care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.