Plant care
Regel's Nidulariumtemperature & humidity
Nidularium regelioides
More about regel's nidularium
Ideal temperature for regel's nidularium
Temperature kills fewer regel's nidularium 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 13–29°C (55–85°F) is fine; the spot you put the plant in matters more. Below roughly 13°C the damage starts — soft blackened patches, translucent leaves, sometimes overnight.
Cold tolerance & winter care
Regel's Nidularium is frost-tender (USDA 11–12, 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 regel's nidularium
Regel's Nidularium sits happiest at around 60–70% relative humidity. Thrives in high ambient humidity consistent with its rainforest origins. Group with other tropicals, use a pebble-and-water tray, or run a cool-mist humidifier nearby. Misting is helpful but avoid wetting the inner bracts during flowering. 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.
Regel's Nidularium temperature & humidity — frequently asked questions
What temperature is best for regel's nidularium?
Regel's Nidularium grows best between 13–29°C (55–85°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 regel's nidularium tolerate?
Regel's Nidularium starts to suffer below roughly 13°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 regel's nidularium need?
Regel's Nidularium prefers about 60–70% relative humidity. Thrives in high ambient humidity consistent with its rainforest origins. Group with other tropicals, use a pebble-and-water tray, or run a cool-mist humidifier nearby. Misting is helpful but avoid wetting the inner bracts during flowering.
How do I raise humidity for regel's nidularium?
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 regel's nidularium live outside?
Regel's Nidularium is rated for USDA zone 11–12 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 regel's nidularium care
In the UK? Keeping regel's nidularium warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full regel's nidularium care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.