Plant care
Variegated String of Heartstemperature & humidity
Ceropegia woodii 'Variegata'
More about variegated string of hearts
Ideal temperature for variegated string of hearts
Temperature kills fewer variegated string of hearts 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 18-26°C (65-80°F) is fine; the spot you put the plant in matters more. Below roughly 18°C the damage starts — soft blackened patches, translucent leaves, sometimes overnight.
Cold tolerance & winter care
Variegated String of Hearts is frost-tender (USDA 10-12 (grown indoors in most US homes), 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 variegated string of hearts
Variegated String of Hearts sits happiest at around 30-50% relative humidity. Average to low household humidity is ideal; as a semi-succulent it dislikes humid, stagnant air which invites rot. No misting or humidifier needed. Good airflow keeps the foliage healthy. 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.
Variegated String of Hearts temperature & humidity — frequently asked questions
What temperature is best for variegated string of hearts?
Variegated String of Hearts grows best between 18-26°C (65-80°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 variegated string of hearts tolerate?
Variegated String of Hearts starts to suffer below roughly 18°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 variegated string of hearts need?
Variegated String of Hearts prefers about 30-50% relative humidity. Average to low household humidity is ideal; as a semi-succulent it dislikes humid, stagnant air which invites rot. No misting or humidifier needed. Good airflow keeps the foliage healthy.
How do I raise humidity for variegated string of hearts?
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 variegated string of hearts live outside?
Variegated String of Hearts is rated for USDA zone 10-12 (grown indoors in most US homes) 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 variegated string of hearts care
In the UK? Keeping variegated string of hearts warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full variegated string of hearts care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.