Plant care
Moore's Coelogynetemperature & humidity
Coelogyne mooreana
More about moore's coelogyne
Ideal temperature for moore's coelogyne
Aim for 10–24°C (night min 10°C, day max 24°C) (50–75°F (night min 50°F, day max 75°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 10°C the damage starts — soft blackened patches, translucent leaves, sometimes overnight.
Cold tolerance & winter care
Moore's Coelogyne is frost-tender (USDA 10a–11, RHS H1c). 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 moore's coelogyne
Moore's Coelogyne sits happiest at around 65–85% relative humidity. High humidity is important, reflecting its mountain rainforest origin. Pair with strong air movement to prevent fungal problems. A cool greenhouse is ideal; indoor growers should use a humidifier and a fan. Night-time humidity above 80% mimics natural conditions closely. 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.
Moore's Coelogyne temperature & humidity — frequently asked questions
What temperature is best for moore's coelogyne?
Moore's Coelogyne grows best between 10–24°C (night min 10°C, day max 24°C) (50–75°F (night min 50°F, day max 75°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 moore's coelogyne tolerate?
Moore's Coelogyne starts to suffer below roughly 10°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 moore's coelogyne need?
Moore's Coelogyne prefers about 65–85% relative humidity. High humidity is important, reflecting its mountain rainforest origin. Pair with strong air movement to prevent fungal problems. A cool greenhouse is ideal; indoor growers should use a humidifier and a fan. Night-time humidity above 80% mimics natural conditions closely.
How do I raise humidity for moore's coelogyne?
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 moore's coelogyne live outside?
Moore's Coelogyne is rated for USDA zone 10a–11 and RHS hardiness H1c. Outside that range it must come indoors before the first frost — treat any outdoor stint as a summer holiday, not a permanent home.
More moore's coelogyne care
In the UK? Keeping moore's coelogyne warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full moore's coelogyne care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.