Plant care
Marseille Germandertemperature & humidity
Teucrium massiliense
More about marseille germander
Ideal temperature for marseille germander
Marseille Germander is comfortable in any room a person is comfortable in, roughly -10 to 30°C (14 to 86°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 -10°C growth pauses; cold beyond that pushes it into dormancy rather than killing it outright.
Cold tolerance & winter care
Marseille Germander is comparatively hardy (USDA 6-9, 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 marseille germander
Marseille Germander sits happiest at around Low relative humidity. Thrives in the dry, warm conditions of coastal southern France; avoid humid, shaded positions that promote stem-base rot. 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.
Marseille Germander temperature & humidity — frequently asked questions
What temperature is best for marseille germander?
Marseille Germander grows best between -10 to 30°C (14 to 86°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 marseille germander tolerate?
Marseille Germander starts to suffer below roughly -10°C. It tolerates a cold dormant period within USDA 6-9, but a wet cold root zone is more dangerous than cold air.
What humidity does marseille germander need?
Marseille Germander prefers about Low relative humidity. Thrives in the dry, warm conditions of coastal southern France; avoid humid, shaded positions that promote stem-base rot.
How do I raise humidity for marseille germander?
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 marseille germander live outside?
Marseille Germander is rated for USDA zone 6-9 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 marseille germander care
In the UK? Keeping marseille germander warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full marseille germander care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.