Plant care
Geranium cinereum 'Lawrence Flatman'temperature & humidity
Geranium cinereum 'Lawrence Flatman'
More about geranium cinereum 'lawrence flatman'
Ideal temperature for geranium cinereum 'lawrence flatman'
Temperature kills fewer geranium cinereum 'lawrence flatman' 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 to 24°C (5 to 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
Geranium cinereum 'Lawrence Flatman' is comparatively hardy (USDA 5-8, 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 geranium cinereum 'lawrence flatman'
Geranium cinereum 'Lawrence Flatman' sits happiest at around Ambient outdoor humidity relative humidity. An alpine perennial that wants airy, open conditions and no added humidity. Damp, stagnant air around the crown invites rot and mildew, so keep it well ventilated. 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 cinereum 'Lawrence Flatman' temperature & humidity — frequently asked questions
What temperature is best for geranium cinereum 'lawrence flatman'?
Geranium cinereum 'Lawrence Flatman' grows best between -15 to 24°C (5 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 cinereum 'lawrence flatman' tolerate?
Geranium cinereum 'Lawrence Flatman' starts to suffer below roughly -15°C. It tolerates a cold dormant period within USDA 5-8, but a wet cold root zone is more dangerous than cold air.
What humidity does geranium cinereum 'lawrence flatman' need?
Geranium cinereum 'Lawrence Flatman' prefers about Ambient outdoor humidity relative humidity. An alpine perennial that wants airy, open conditions and no added humidity. Damp, stagnant air around the crown invites rot and mildew, so keep it well ventilated.
How do I raise humidity for geranium cinereum 'lawrence flatman'?
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 cinereum 'lawrence flatman' live outside?
Geranium cinereum 'Lawrence Flatman' is rated for USDA zone 5-8 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 geranium cinereum 'lawrence flatman' care
In the UK? Keeping geranium cinereum 'lawrence flatman' 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 cinereum 'lawrence flatman' care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.