Plant care
Blanket Flowertemperature & humidity
Gaillardia aristata
More about blanket flower
Ideal temperature for blanket flower
Temperature kills fewer blanket flower 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 -34 to 32°C (-29 to 90°F) is fine; the spot you put the plant in matters more. Below roughly -34°C growth pauses; cold beyond that pushes it into dormancy rather than killing it outright.
Cold tolerance & winter care
Blanket Flower is comparatively hardy (USDA 3-9 (hardy short-lived perennial), 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 blanket flower
Blanket Flower sits happiest at around 30-50% relative humidity. A hardy outdoor perennial adapted to dry, sunny climates with no humidity requirements. It dislikes prolonged dampness; in humid regions, give it open spacing and excellent drainage to prevent crown and root 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.
Blanket Flower temperature & humidity — frequently asked questions
What temperature is best for blanket flower?
Blanket Flower grows best between -34 to 32°C (-29 to 90°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 blanket flower tolerate?
Blanket Flower starts to suffer below roughly -34°C. It tolerates a cold dormant period within USDA 3-9 (hardy short-lived perennial), but a wet cold root zone is more dangerous than cold air.
What humidity does blanket flower need?
Blanket Flower prefers about 30-50% relative humidity. A hardy outdoor perennial adapted to dry, sunny climates with no humidity requirements. It dislikes prolonged dampness; in humid regions, give it open spacing and excellent drainage to prevent crown and root rot.
How do I raise humidity for blanket flower?
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 blanket flower live outside?
Blanket Flower is rated for USDA zone 3-9 (hardy short-lived perennial) 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 blanket flower care
In the UK? Keeping blanket flower warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full blanket flower care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.