Plant care
Silver Mound Artemisiatemperature & humidity
Artemisia schmidtiana 'Nana'
More about silver mound artemisia
Ideal temperature for silver mound artemisia
Aim for 15-27°C (59-81°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 15°C growth pauses; cold beyond that pushes it into dormancy rather than killing it outright.
Cold tolerance & winter care
Silver Mound Artemisia is comparatively hardy (USDA 3-8 (hardy perennial outdoors), 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 silver mound artemisia
Silver Mound Artemisia sits happiest at around 30-50% relative humidity. Prefers dry air and excellent airflow. Outdoor humidity is fine, but the dense silky foliage is prone to rot and mildew in humid, stagnant or crowded conditions. 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.
Silver Mound Artemisia temperature & humidity — frequently asked questions
What temperature is best for silver mound artemisia?
Silver Mound Artemisia grows best between 15-27°C (59-81°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 silver mound artemisia tolerate?
Silver Mound Artemisia starts to suffer below roughly 15°C. It tolerates a cold dormant period within USDA 3-8 (hardy perennial outdoors), but a wet cold root zone is more dangerous than cold air.
What humidity does silver mound artemisia need?
Silver Mound Artemisia prefers about 30-50% relative humidity. Prefers dry air and excellent airflow. Outdoor humidity is fine, but the dense silky foliage is prone to rot and mildew in humid, stagnant or crowded conditions.
How do I raise humidity for silver mound artemisia?
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 silver mound artemisia live outside?
Silver Mound Artemisia is rated for USDA zone 3-8 (hardy perennial outdoors) 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 silver mound artemisia care
In the UK? Keeping silver mound artemisia warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full silver mound artemisia care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.