Plant care
Anthurium arisaemoidestemperature & humidity
Anthurium arisaemoides
More about anthurium arisaemoides
Ideal temperature for anthurium arisaemoides
Temperature kills fewer anthurium arisaemoides 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 18-26°C (65-79°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
Anthurium arisaemoides is frost-tender (USDA 10-12 (indoor in most US homes), RHS H1b). 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 anthurium arisaemoides
Anthurium arisaemoides sits happiest at around 70-90% relative humidity. A genuinely high-humidity species best grown in a terrarium or grow cabinet; it struggles in open-room humidity. Sustained levels above 70% keep the divided leaves intact, while dry air rapidly browns and crisps the fine segments. 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.
Anthurium arisaemoides temperature & humidity — frequently asked questions
What temperature is best for anthurium arisaemoides?
Anthurium arisaemoides grows best between 18-26°C (65-79°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 anthurium arisaemoides tolerate?
Anthurium arisaemoides 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 anthurium arisaemoides need?
Anthurium arisaemoides prefers about 70-90% relative humidity. A genuinely high-humidity species best grown in a terrarium or grow cabinet; it struggles in open-room humidity. Sustained levels above 70% keep the divided leaves intact, while dry air rapidly browns and crisps the fine segments.
How do I raise humidity for anthurium arisaemoides?
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 anthurium arisaemoides live outside?
Anthurium arisaemoides is rated for USDA zone 10-12 (indoor in most US homes) and RHS hardiness H1b. Outside that range it must come indoors before the first frost — treat any outdoor stint as a summer holiday, not a permanent home.
More anthurium arisaemoides care
In the UK? Keeping anthurium arisaemoides warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full anthurium arisaemoides care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.