Plant care
Daffodiltemperature & humidity
Narcissus pseudonarcissus
More about daffodil
Ideal temperature for daffodil
Temperature kills fewer daffodil 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 -20°C to 20°C (optimal growth: 5–15°C) (-4°F to 68°F (optimal growth: 41–59°F)) is fine; the spot you put the plant in matters more. Below roughly -20°C growth pauses; cold beyond that pushes it into dormancy rather than killing it outright.
Cold tolerance & winter care
Daffodil is comparatively hardy (USDA 3–9, 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 daffodil
Daffodil sits happiest at around Moderate; 50–70% RH relative humidity. Well-adapted to the moderate humidity of temperate woodland and meadow habitats. Does not require specific humidity management in garden settings. Adequate air circulation helps prevent fungal issues, particularly narcissus smoulder (Botrytis narcissicola). 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.
Daffodil temperature & humidity — frequently asked questions
What temperature is best for daffodil?
Daffodil grows best between -20°C to 20°C (optimal growth: 5–15°C) (-4°F to 68°F (optimal growth: 41–59°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 daffodil tolerate?
Daffodil starts to suffer below roughly -20°C. It tolerates a cold dormant period within USDA 3–9, but a wet cold root zone is more dangerous than cold air.
What humidity does daffodil need?
Daffodil prefers about Moderate; 50–70% RH relative humidity. Well-adapted to the moderate humidity of temperate woodland and meadow habitats. Does not require specific humidity management in garden settings. Adequate air circulation helps prevent fungal issues, particularly narcissus smoulder (Botrytis narcissicola).
How do I raise humidity for daffodil?
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 daffodil live outside?
Daffodil is rated for USDA zone 3–9 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 daffodil care
In the UK? Keeping daffodil warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full daffodil care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.