Plant care
Osbeck's Rock Rosetemperature & humidity
Cistus osbeckiifolius
More about osbeck's rock rose
Ideal temperature for osbeck's rock rose
Osbeck's Rock Rose is comfortable in any room a person is comfortable in, roughly 2 to 30°C (36 to 86°F). The mistakes are micro-climates: a north-facing window on a frosty night, a south-facing windowsill in a summer heatwave, the standing draught between an opened kitchen door and the radiator behind it. Read the room around the plant, not the thermostat. Below roughly 2°C the damage starts — soft blackened patches, translucent leaves, sometimes overnight.
Cold tolerance & winter care
Osbeck's Rock Rose is frost-tender (USDA 10-11, RHS H2). 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 osbeck's rock rose
Osbeck's Rock Rose sits happiest at around Low to moderate (30–55% RH) relative humidity. The high-altitude Canary Islands habitat has moderate humidity but excellent air circulation; stagnant humid conditions at low altitude may predispose plants to fungal problems. 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.
Osbeck's Rock Rose temperature & humidity — frequently asked questions
What temperature is best for osbeck's rock rose?
Osbeck's Rock Rose grows best between 2 to 30°C (36 to 86°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 osbeck's rock rose tolerate?
Osbeck's Rock Rose starts to suffer below roughly 2°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 osbeck's rock rose need?
Osbeck's Rock Rose prefers about Low to moderate (30–55% RH) relative humidity. The high-altitude Canary Islands habitat has moderate humidity but excellent air circulation; stagnant humid conditions at low altitude may predispose plants to fungal problems.
How do I raise humidity for osbeck's rock rose?
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 osbeck's rock rose live outside?
Osbeck's Rock Rose is rated for USDA zone 10-11 and RHS hardiness H2. Outside that range it must come indoors before the first frost — treat any outdoor stint as a summer holiday, not a permanent home.
More osbeck's rock rose care
In the UK? Keeping osbeck's rock rose warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full osbeck's rock rose care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.