Plant care
Swan Orchidtemperature & humidity
Cycnoches chlorochilon
More about swan orchid
Ideal temperature for swan orchid
Aim for 20-30°C (day) in summer; 13-18°C cool dry rest in winter (68-86°F (day) in summer; 55-64°F cool dry rest in winter) 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 20°C the damage starts — soft blackened patches, translucent leaves, sometimes overnight.
Cold tolerance & winter care
Swan Orchid is frost-tender (USDA 11-12 (greenhouse or indoor plant in all but tropical climates), 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 swan orchid
Swan Orchid sits happiest at around 60-75% during growth; 40-55% during dry rest relative humidity. High humidity during the growing season promotes rapid pseudobulb development. A drier atmosphere during the leafless winter rest helps prevent rot on dormant pseudobulbs. 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.
Swan Orchid temperature & humidity — frequently asked questions
What temperature is best for swan orchid?
Swan Orchid grows best between 20-30°C (day) in summer; 13-18°C cool dry rest in winter (68-86°F (day) in summer; 55-64°F cool dry rest in winter). 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 swan orchid tolerate?
Swan Orchid starts to suffer below roughly 20°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 swan orchid need?
Swan Orchid prefers about 60-75% during growth; 40-55% during dry rest relative humidity. High humidity during the growing season promotes rapid pseudobulb development. A drier atmosphere during the leafless winter rest helps prevent rot on dormant pseudobulbs.
How do I raise humidity for swan orchid?
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 swan orchid live outside?
Swan Orchid is rated for USDA zone 11-12 (greenhouse or indoor plant in all but tropical climates) 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 swan orchid care
In the UK? Keeping swan orchid warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full swan orchid care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.