Plant care
Ruby Necklacetemperature & humidity
Othonna capensis
More about ruby necklace
Ideal temperature for ruby necklace
Temperature kills fewer ruby necklace 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 18-27 C (keep above ~10 C; hardy to about -1 C) (65-80 F (keep above ~50 F; hardy to about 30 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
Ruby Necklace is frost-tender (USDA USDA 9b-11 (frost-tender; grow as a houseplant or move indoors below ~50 F / 10 C), RHS undefined). 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 ruby necklace
Ruby Necklace sits happiest at around Average to low (around 30-50 percent) relative humidity. As an arid-adapted South African succulent it actively prefers dry household air and needs no misting or humidity trays. High humidity combined with poor airflow encourages stem rot and fungal problems, so good ventilation matters more than added moisture. 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.
Ruby Necklace temperature & humidity — frequently asked questions
What temperature is best for ruby necklace?
Ruby Necklace grows best between 18-27 C (keep above ~10 C; hardy to about -1 C) (65-80 F (keep above ~50 F; hardy to about 30 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 ruby necklace tolerate?
Ruby Necklace 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 ruby necklace need?
Ruby Necklace prefers about Average to low (around 30-50 percent) relative humidity. As an arid-adapted South African succulent it actively prefers dry household air and needs no misting or humidity trays. High humidity combined with poor airflow encourages stem rot and fungal problems, so good ventilation matters more than added moisture.
How do I raise humidity for ruby necklace?
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 ruby necklace live outside?
Ruby Necklace is rated for USDA zone USDA 9b-11 (frost-tender; grow as a houseplant or move indoors below ~50 F / 10 C). Outside that range it must come indoors before the first frost — treat any outdoor stint as a summer holiday, not a permanent home.
More ruby necklace care
In the UK? Keeping ruby necklace warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full ruby necklace care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.