Plant care
Eternal Flame Planttemperature & humidity
Goeppertia crocata
More about eternal flame plant
Ideal temperature for eternal flame plant
Temperature kills fewer eternal flame plant 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 18-27 C (65-80 F) is fine; the spot you put the plant in matters more. Below roughly 18°C the damage starts — soft blackened patches, translucent leaves, sometimes overnight.
Cold tolerance & winter care
Eternal Flame Plant is frost-tender (USDA USDA zones 11-12 outdoors; grown as a houseplant elsewhere. Minimum safe temperature around 13-15 C (55-59 F); cold drafts and sudden chills damage it., RHS undefined). 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 eternal flame plant
Eternal Flame Plant sits happiest at around Above 50%, ideally 60%+ relative humidity. A genuine high-humidity lover. Below ~50% the leaf edges turn brown and crispy. Group plants, stand the pot on a pebble-and-water tray, or run a humidifier. A bright bathroom or kitchen suits it; cold misting is a weak, short-lived fix and can encourage leaf spot. 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.
Eternal Flame Plant temperature & humidity — frequently asked questions
What temperature is best for eternal flame plant?
Eternal Flame Plant grows best between 18-27 C (65-80 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 eternal flame plant tolerate?
Eternal Flame Plant starts to suffer below roughly 18°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 eternal flame plant need?
Eternal Flame Plant prefers about Above 50%, ideally 60%+ relative humidity. A genuine high-humidity lover. Below ~50% the leaf edges turn brown and crispy. Group plants, stand the pot on a pebble-and-water tray, or run a humidifier. A bright bathroom or kitchen suits it; cold misting is a weak, short-lived fix and can encourage leaf spot.
How do I raise humidity for eternal flame plant?
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 eternal flame plant live outside?
Eternal Flame Plant is rated for USDA zone USDA zones 11-12 outdoors; grown as a houseplant elsewhere. Minimum safe temperature around 13-15 C (55-59 F); cold drafts and sudden chills damage it.. Outside that range it must come indoors before the first frost — treat any outdoor stint as a summer holiday, not a permanent home.
More eternal flame plant care
In the UK? Keeping eternal flame plant warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full eternal flame plant care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.