Plant care
Catmint 'Walker's Low'temperature & humidity
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More about catmint 'walker's low'
Ideal temperature for catmint 'walker's low'
Catmint 'Walker's Low' is comfortable in any room a person is comfortable in, roughly -20 to 35°C (-4 to 95°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
Catmint 'Walker's Low' is comparatively hardy (USDA 4-8, 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 catmint 'walker's low'
Catmint 'Walker's Low' sits happiest at around 30-60% relative humidity. Fully hardy and undemanding about humidity. Prefers open, airy conditions which help prevent powdery mildew. Avoid overhead watering and ensure good air circulation around the plant. 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.
Catmint 'Walker's Low' temperature & humidity — frequently asked questions
What temperature is best for catmint 'walker's low'?
Catmint 'Walker's Low' grows best between -20 to 35°C (-4 to 95°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 catmint 'walker's low' tolerate?
Catmint 'Walker's Low' starts to suffer below roughly -20°C. It tolerates a cold dormant period within USDA 4-8, but a wet cold root zone is more dangerous than cold air.
What humidity does catmint 'walker's low' need?
Catmint 'Walker's Low' prefers about 30-60% relative humidity. Fully hardy and undemanding about humidity. Prefers open, airy conditions which help prevent powdery mildew. Avoid overhead watering and ensure good air circulation around the plant.
How do I raise humidity for catmint 'walker's low'?
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 catmint 'walker's low' live outside?
Catmint 'Walker's Low' is rated for USDA zone 4-8 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 catmint 'walker's low' care
In the UK? Keeping catmint 'walker's low' warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full catmint 'walker's low' care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.