Plant care
Red Gingertemperature & humidity
Alpinia purpurata
More about red ginger
Ideal temperature for red ginger
Red Ginger is comfortable in any room a person is comfortable in, roughly 21–32°C (70–90°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 21°C the damage starts — soft blackened patches, translucent leaves, sometimes overnight.
Cold tolerance & winter care
Red Ginger is frost-tender (USDA 9b–11, RHS H1a). It cannot survive a frost, so in most of the US and UK it lives indoors year-round or summers outside and comes back in well before the first autumn frost — once nights drop toward 10-12°C is the cue, not the first frost warning. Acclimate it over a week when moving between indoors and out so the leaves do not shock.
Humidity for red ginger
Red Ginger sits happiest at around 60–90% relative humidity. Requires high humidity for superior bract quality and healthy foliage — mirroring its native moist tropical forest habitat. Indoors, run a humidifier and keep away from heating vents. Outdoors, performs best in naturally humid climates. 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.
Red Ginger temperature & humidity — frequently asked questions
What temperature is best for red ginger?
Red Ginger grows best between 21–32°C (70–90°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 red ginger tolerate?
Red Ginger starts to suffer below roughly 21°C. It is frost-tender and will be damaged or killed by a frost, so bring it indoors once nights fall toward 10-12°C.
What humidity does red ginger need?
Red Ginger prefers about 60–90% relative humidity. Requires high humidity for superior bract quality and healthy foliage — mirroring its native moist tropical forest habitat. Indoors, run a humidifier and keep away from heating vents. Outdoors, performs best in naturally humid climates.
How do I raise humidity for red ginger?
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 red ginger live outside?
Red Ginger is rated for USDA zone 9b–11 and RHS hardiness H1a. Outside that range it must come indoors before the first frost — treat any outdoor stint as a summer holiday, not a permanent home.
More red ginger care
In the UK? Keeping red ginger warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full red ginger care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.