Plant care
Regal Anthuriumtemperature & humidity
Anthurium regale
More about regal anthurium
Ideal temperature for regal anthurium
Aim for 18-27°C (65-80°F) on the thermostat and you've handled the easy part. The hard part is the half-metre around the plant: window glass that drops to near-freezing on a January night, a radiator pumping out hot dry air, a draught from an opened front door. Move the plant 30 cm and you've usually fixed the problem. Below roughly 18°C the damage starts — soft blackened patches, translucent leaves, sometimes overnight.
Cold tolerance & winter care
Regal Anthurium is frost-tender (USDA 10-12 (outdoors); grown as an indoor houseplant elsewhere, 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 regal anthurium
Regal Anthurium sits happiest at around 60-80% relative humidity. A high-humidity plant native to cloud forest. It performs best above 60%; below about 50% leaf edges brown and new leaves may emerge deformed. A humidifier is the most reliable fix; grouping plants or a pebble tray helps modestly. Avoid heavy misting on the velvet leaves, which can encourage fungal spotting. 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.
Regal Anthurium temperature & humidity — frequently asked questions
What temperature is best for regal anthurium?
Regal Anthurium 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 regal anthurium tolerate?
Regal Anthurium 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 regal anthurium need?
Regal Anthurium prefers about 60-80% relative humidity. A high-humidity plant native to cloud forest. It performs best above 60%; below about 50% leaf edges brown and new leaves may emerge deformed. A humidifier is the most reliable fix; grouping plants or a pebble tray helps modestly. Avoid heavy misting on the velvet leaves, which can encourage fungal spotting.
How do I raise humidity for regal anthurium?
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 regal anthurium live outside?
Regal Anthurium is rated for USDA zone 10-12 (outdoors); grown as an indoor houseplant elsewhere. Outside that range it must come indoors before the first frost — treat any outdoor stint as a summer holiday, not a permanent home.
More regal anthurium care
In the UK? Keeping regal anthurium warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full regal anthurium care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.