Plant care
Calendula 'Indian Prince'temperature & humidity
Calendula officinalis 'Indian Prince'
More about calendula 'indian prince'
Ideal temperature for calendula 'indian prince'
Calendula 'Indian Prince' is comfortable in any room a person is comfortable in, roughly 5-25°C (41-77°F). The mistakes are micro-climates: a north-facing window on a frosty night, a south-facing windowsill in a summer heatwave, the standing draught between an opened kitchen door and the radiator behind it. Read the room around the plant, not the thermostat. Below roughly 5°C growth pauses; cold beyond that pushes it into dormancy rather than killing it outright.
Cold tolerance & winter care
Calendula 'Indian Prince' is comparatively hardy (USDA Hardy annual; grown as cool-season annual in zones 2-11 (overwinters in 9-11), RHS H4). 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 calendula 'indian prince'
Calendula 'Indian Prince' sits happiest at around Outdoor ambient relative humidity. Indifferent to humidity and noted for good mildew resistance, though airflow still helps in damp seasons. No humidity provision needed. 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.
Calendula 'Indian Prince' temperature & humidity — frequently asked questions
What temperature is best for calendula 'indian prince'?
Calendula 'Indian Prince' grows best between 5-25°C (41-77°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 calendula 'indian prince' tolerate?
Calendula 'Indian Prince' starts to suffer below roughly 5°C. It tolerates a cold dormant period within USDA Hardy annual; grown as cool-season annual in zones 2-11 (overwinters in 9-11), but a wet cold root zone is more dangerous than cold air.
What humidity does calendula 'indian prince' need?
Calendula 'Indian Prince' prefers about Outdoor ambient relative humidity. Indifferent to humidity and noted for good mildew resistance, though airflow still helps in damp seasons. No humidity provision needed.
How do I raise humidity for calendula 'indian prince'?
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 calendula 'indian prince' live outside?
Calendula 'Indian Prince' is rated for USDA zone Hardy annual; grown as cool-season annual in zones 2-11 (overwinters in 9-11) and RHS hardiness H4. 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 calendula 'indian prince' care
In the UK? Keeping calendula 'indian prince' warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full calendula 'indian prince' care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.