Plant care
Paprika yarrowtemperature & humidity
Achillea millefolium 'Paprika'
More about paprika yarrow
Ideal temperature for paprika yarrow
Temperature kills fewer paprika yarrow plants than you'd think. What kills them is the micro-climate within a normal-temperature room — a leaf pressed against single-glazed winter glass, the hot dry updraft directly above a radiator, the cold blast from an AC vent. The thermostat reading at -40°C to 35°C (-40°F to 95°F) is fine; the spot you put the plant in matters more. Below roughly -40°C growth pauses; cold beyond that pushes it into dormancy rather than killing it outright.
Cold tolerance & winter care
Paprika yarrow is comparatively hardy (USDA 3–8, 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 paprika yarrow
Paprika yarrow sits happiest at around Low to moderate — 30–55% RH relative humidity. Naturally adapted to open, sunny, dry habitats. High humidity increases powdery mildew risk. Excellent for dry continental and Mediterranean-style gardens; in humid climates ensure excellent drainage and airflow. 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.
Paprika yarrow temperature & humidity — frequently asked questions
What temperature is best for paprika yarrow?
Paprika yarrow grows best between -40°C to 35°C (-40°F 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 paprika yarrow tolerate?
Paprika yarrow starts to suffer below roughly -40°C. It tolerates a cold dormant period within USDA 3–8, but a wet cold root zone is more dangerous than cold air.
What humidity does paprika yarrow need?
Paprika yarrow prefers about Low to moderate — 30–55% RH relative humidity. Naturally adapted to open, sunny, dry habitats. High humidity increases powdery mildew risk. Excellent for dry continental and Mediterranean-style gardens; in humid climates ensure excellent drainage and airflow.
How do I raise humidity for paprika yarrow?
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 paprika yarrow live outside?
Paprika yarrow is rated for USDA zone 3–8 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 paprika yarrow care
In the UK? Keeping paprika yarrow warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full paprika yarrow care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.