Plant care
slender lipstick planttemperature & humidity
Aeschynanthus gracilis
More about slender lipstick plant
Ideal temperature for slender lipstick plant
Temperature kills fewer slender lipstick plant 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 17–28°C (63–82°F) is fine; the spot you put the plant in matters more. Below roughly 17°C the damage starts — soft blackened patches, translucent leaves, sometimes overnight.
Cold tolerance & winter care
slender lipstick plant is frost-tender (USDA 11-12, 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 slender lipstick plant
slender lipstick plant sits happiest at around 55–75% relative humidity. High humidity is important for healthy growth and good flower production. Position in a naturally humid room (bathroom, kitchen) with adequate light, or use a pebble tray. Brown leaf tips indicate humidity is too low; consistent levels above 55% prevent this. 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.
slender lipstick plant temperature & humidity — frequently asked questions
What temperature is best for slender lipstick plant?
slender lipstick plant grows best between 17–28°C (63–82°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 slender lipstick plant tolerate?
slender lipstick plant starts to suffer below roughly 17°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 slender lipstick plant need?
slender lipstick plant prefers about 55–75% relative humidity. High humidity is important for healthy growth and good flower production. Position in a naturally humid room (bathroom, kitchen) with adequate light, or use a pebble tray. Brown leaf tips indicate humidity is too low; consistent levels above 55% prevent this.
How do I raise humidity for slender lipstick plant?
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 slender lipstick plant live outside?
slender lipstick plant is rated for USDA zone 11-12 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 slender lipstick plant care
In the UK? Keeping slender lipstick plant warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full slender lipstick plant care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.