Plant care
Nemesia strumosa 'Poetry Blue'temperature & humidity
Nemesia strumosa 'Poetry Blue'
More about nemesia strumosa 'poetry blue'
Ideal temperature for nemesia strumosa 'poetry blue'
Temperature kills fewer nemesia strumosa 'poetry blue' 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 10-24°C (50-75°F) is fine; the spot you put the plant in matters more. Below roughly 10°C growth pauses; cold beyond that pushes it into dormancy rather than killing it outright.
Cold tolerance & winter care
Nemesia strumosa 'Poetry Blue' is comparatively hardy (USDA 9-10 (grown as a frost-tender cool-season annual in most US zones), RHS H3). 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 nemesia strumosa 'poetry blue'
Nemesia strumosa 'Poetry Blue' sits happiest at around 40-60% relative humidity. A cool-climate annual indifferent to air humidity. Reasonable airflow keeps foliage healthy; summer heat and dry roots affect performance far more than ambient humidity. 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.
Nemesia strumosa 'Poetry Blue' temperature & humidity — frequently asked questions
What temperature is best for nemesia strumosa 'poetry blue'?
Nemesia strumosa 'Poetry Blue' grows best between 10-24°C (50-75°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 nemesia strumosa 'poetry blue' tolerate?
Nemesia strumosa 'Poetry Blue' starts to suffer below roughly 10°C. It tolerates a cold dormant period within USDA 9-10 (grown as a frost-tender cool-season annual in most US zones), but a wet cold root zone is more dangerous than cold air.
What humidity does nemesia strumosa 'poetry blue' need?
Nemesia strumosa 'Poetry Blue' prefers about 40-60% relative humidity. A cool-climate annual indifferent to air humidity. Reasonable airflow keeps foliage healthy; summer heat and dry roots affect performance far more than ambient humidity.
How do I raise humidity for nemesia strumosa 'poetry blue'?
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 nemesia strumosa 'poetry blue' live outside?
Nemesia strumosa 'Poetry Blue' is rated for USDA zone 9-10 (grown as a frost-tender cool-season annual in most US zones) and RHS hardiness H3. 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 nemesia strumosa 'poetry blue' care
In the UK? Keeping nemesia strumosa 'poetry blue' warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full nemesia strumosa 'poetry blue' care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.