Plant care
Greater Woodrushtemperature & humidity
Luzula sylvatica
More about greater woodrush
Ideal temperature for greater woodrush
Greater Woodrush is comfortable in any room a person is comfortable in, roughly -20°C to 25°C (-4°F to 77°F). The mistakes are micro-climates: a north-facing window on a frosty night, a south-facing windowsill in a summer heatwave, the standing draught between an opened kitchen door and the radiator behind it. Read the room around the plant, not the thermostat. Below roughly -20°C growth pauses; cold beyond that pushes it into dormancy rather than killing it outright.
Cold tolerance & winter care
Greater Woodrush is comparatively hardy (USDA 5-9, 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 greater woodrush
Greater Woodrush sits happiest at around Moderate (40–70%) relative humidity. As an outdoor woodland plant, it copes well with ambient humidity; does not need supplemental misting and is indifferent to humidity levels typical of UK and US temperate gardens. 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.
Greater Woodrush temperature & humidity — frequently asked questions
What temperature is best for greater woodrush?
Greater Woodrush grows best between -20°C to 25°C (-4°F to 77°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 greater woodrush tolerate?
Greater Woodrush starts to suffer below roughly -20°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 greater woodrush need?
Greater Woodrush prefers about Moderate (40–70%) relative humidity. As an outdoor woodland plant, it copes well with ambient humidity; does not need supplemental misting and is indifferent to humidity levels typical of UK and US temperate gardens.
How do I raise humidity for greater woodrush?
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 greater woodrush live outside?
Greater Woodrush is rated for USDA zone 5-9 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 greater woodrush care
In the UK? Keeping greater woodrush warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full greater woodrush care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.