Plant care
Teysmann's Medinillatemperature & humidity
Medinilla teysmannii
More about teysmann's medinilla
Ideal temperature for teysmann's medinilla
Temperature kills fewer teysmann's medinilla 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 17–25°C (63–77°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
Teysmann's Medinilla is frost-tender (USDA 11–12, RHS H1b). 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 teysmann's medinilla
Teysmann's Medinilla sits happiest at around 60–80% relative humidity. High humidity, ideally 60% or above, is essential for healthy growth. Group plants together, use pebble trays with water, or run a humidifier nearby. Misting the foliage is acceptable but ensure good air circulation to prevent fungal issues. 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.
Teysmann's Medinilla temperature & humidity — frequently asked questions
What temperature is best for teysmann's medinilla?
Teysmann's Medinilla grows best between 17–25°C (63–77°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 teysmann's medinilla tolerate?
Teysmann's Medinilla 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 teysmann's medinilla need?
Teysmann's Medinilla prefers about 60–80% relative humidity. High humidity, ideally 60% or above, is essential for healthy growth. Group plants together, use pebble trays with water, or run a humidifier nearby. Misting the foliage is acceptable but ensure good air circulation to prevent fungal issues.
How do I raise humidity for teysmann's medinilla?
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 teysmann's medinilla live outside?
Teysmann's Medinilla is rated for USDA zone 11–12 and RHS hardiness H1b. Outside that range it must come indoors before the first frost — treat any outdoor stint as a summer holiday, not a permanent home.
More teysmann's medinilla care
In the UK? Keeping teysmann's medinilla warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full teysmann's medinilla care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.