Plant care
Creeping Lemon Thymetemperature & humidity
Thymus citriodorus 'Aureus'
More about creeping lemon thyme
Ideal temperature for creeping lemon thyme
Creeping Lemon Thyme is comfortable in any room a person is comfortable in, roughly 15-24°C (59-75°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 15°C growth pauses; cold beyond that pushes it into dormancy rather than killing it outright.
Cold tolerance & winter care
Creeping Lemon Thyme is comparatively hardy (USDA 5-9 (hardy perennial outdoors), 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 creeping lemon thyme
Creeping Lemon Thyme sits happiest at around 40-50% relative humidity. Prefers dry, breezy conditions with good air movement. High humidity and damp, crowded growth invite rot and fungal problems, so avoid misting and ensure free air circulation. 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.
Creeping Lemon Thyme temperature & humidity — frequently asked questions
What temperature is best for creeping lemon thyme?
Creeping Lemon Thyme grows best between 15-24°C (59-75°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 creeping lemon thyme tolerate?
Creeping Lemon Thyme starts to suffer below roughly 15°C. It tolerates a cold dormant period within USDA 5-9 (hardy perennial outdoors), but a wet cold root zone is more dangerous than cold air.
What humidity does creeping lemon thyme need?
Creeping Lemon Thyme prefers about 40-50% relative humidity. Prefers dry, breezy conditions with good air movement. High humidity and damp, crowded growth invite rot and fungal problems, so avoid misting and ensure free air circulation.
How do I raise humidity for creeping lemon thyme?
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 creeping lemon thyme live outside?
Creeping Lemon Thyme is rated for USDA zone 5-9 (hardy perennial outdoors) 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 creeping lemon thyme care
In the UK? Keeping creeping lemon thyme warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full creeping lemon thyme care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.