Plant care
Lined Sinningiatemperature & humidity
Sinningia lineata
More about lined sinningia
Ideal temperature for lined sinningia
Lined Sinningia is comfortable in any room a person is comfortable in, roughly 16–26 °C in growth; 10–15 °C during dormancy (61–79 °F in growth; 50–59 °F during dormancy). 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 16°C the damage starts — soft blackened patches, translucent leaves, sometimes overnight.
Cold tolerance & winter care
Lined Sinningia is frost-tender (USDA 10–12 (indoor in most climates), 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 lined sinningia
Lined Sinningia sits happiest at around 45–65% relative humidity. Average indoor humidity is generally adequate; avoid siting near heating vents which cause excessive drying and leaf tip scorch. 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.
Lined Sinningia temperature & humidity — frequently asked questions
What temperature is best for lined sinningia?
Lined Sinningia grows best between 16–26 °C in growth; 10–15 °C during dormancy (61–79 °F in growth; 50–59 °F during dormancy). 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 lined sinningia tolerate?
Lined Sinningia starts to suffer below roughly 16°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 lined sinningia need?
Lined Sinningia prefers about 45–65% relative humidity. Average indoor humidity is generally adequate; avoid siting near heating vents which cause excessive drying and leaf tip scorch.
How do I raise humidity for lined sinningia?
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 lined sinningia live outside?
Lined Sinningia is rated for USDA zone 10–12 (indoor in most climates) 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 lined sinningia care
In the UK? Keeping lined sinningia warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full lined sinningia care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.