Plant care
Long-stalked Spiderworttemperature & humidity
Tradescantia longipes
More about long-stalked spiderwort
Ideal temperature for long-stalked spiderwort
Aim for -25°C to 32°C (-13°F to 90°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 -25°C growth pauses; cold beyond that pushes it into dormancy rather than killing it outright.
Cold tolerance & winter care
Long-stalked Spiderwort is comparatively hardy (USDA 4-9, RHS H6). 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 long-stalked spiderwort
Long-stalked Spiderwort sits happiest at around Moderate to high relative humidity. Naturally found in humid Ozark woodland ravines; appreciates consistent ambient humidity. Mulching around the root zone helps maintain soil moisture and microclimate humidity. 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.
Long-stalked Spiderwort temperature & humidity — frequently asked questions
What temperature is best for long-stalked spiderwort?
Long-stalked Spiderwort grows best between -25°C to 32°C (-13°F to 90°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 long-stalked spiderwort tolerate?
Long-stalked Spiderwort starts to suffer below roughly -25°C. It tolerates a cold dormant period within USDA 4-9, but a wet cold root zone is more dangerous than cold air.
What humidity does long-stalked spiderwort need?
Long-stalked Spiderwort prefers about Moderate to high relative humidity. Naturally found in humid Ozark woodland ravines; appreciates consistent ambient humidity. Mulching around the root zone helps maintain soil moisture and microclimate humidity.
How do I raise humidity for long-stalked spiderwort?
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 long-stalked spiderwort live outside?
Long-stalked Spiderwort is rated for USDA zone 4-9 and RHS hardiness H6. 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 long-stalked spiderwort care
In the UK? Keeping long-stalked spiderwort warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full long-stalked spiderwort care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.