Plant care
Nodding Greenhoodtemperature & humidity
Pterostylis nutans
More about nodding greenhood
Ideal temperature for nodding greenhood
Aim for 4-20°C (39-68°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 4°C growth pauses; cold beyond that pushes it into dormancy rather than killing it outright.
Cold tolerance & winter care
Nodding Greenhood is comparatively hardy (USDA 8-10 (cool greenhouse in most climates; outdoor in mild temperate zones), RHS H4). 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 nodding greenhood
Nodding Greenhood sits happiest at around 50-65% relative humidity. Moderate humidity suits this cool-temperate species. Avoid dry, overheated rooms. Cool, fresh air circulation is more beneficial than attempting very high 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.
Nodding Greenhood temperature & humidity — frequently asked questions
What temperature is best for nodding greenhood?
Nodding Greenhood grows best between 4-20°C (39-68°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 nodding greenhood tolerate?
Nodding Greenhood starts to suffer below roughly 4°C. It tolerates a cold dormant period within USDA 8-10 (cool greenhouse in most climates; outdoor in mild temperate zones), but a wet cold root zone is more dangerous than cold air.
What humidity does nodding greenhood need?
Nodding Greenhood prefers about 50-65% relative humidity. Moderate humidity suits this cool-temperate species. Avoid dry, overheated rooms. Cool, fresh air circulation is more beneficial than attempting very high humidity.
How do I raise humidity for nodding greenhood?
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 nodding greenhood live outside?
Nodding Greenhood is rated for USDA zone 8-10 (cool greenhouse in most climates; outdoor in mild temperate zones) and RHS hardiness H4. 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 nodding greenhood care
In the UK? Keeping nodding greenhood warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full nodding greenhood care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.