Overwintering guide
How to overwinter conophytum calculus
Winter watering
Cut watering right back — conophytum calculus uses far less while growth slows, and cold, wet compost is the usual cause of winter root rot. Stop feeding until spring.
The mistake that kills conophytum calculus in winter
Watering on the same schedule as summer. In winter that keeps the roots sodden while the plant is barely drinking, and conophytum calculus rots from the base.
More conophytum calculus care
Overwintering conophytum calculus — FAQ
Does conophytum calculus need to come indoors for winter?
Conophytum Calculus is hardy to roughly USDA zone 10 — winter lows around -1°C. That means it will not survive frost and needs to come inside. Conophytum Calculus is frost-tender, so overwintering means bringing it inside and letting it rest rather than pushing it to grow. Move it indoors well before the first frost, give it the brightest spot you have (light levels indoors drop sharply in winter), and keep it away from both cold window glass and hot radiators — the swing between the two does more damage than the cold itself.
When should I move conophytum calculus for winter?
Bring indoors when nights start dropping below about 10°C, ahead of the first frost.
How often should I water conophytum calculus in winter?
Cut watering right back — conophytum calculus uses far less while growth slows, and cold, wet compost is the usual cause of winter root rot. Stop feeding until spring.
What kills conophytum calculus over winter?
Watering on the same schedule as summer. In winter that keeps the roots sodden while the plant is barely drinking, and conophytum calculus rots from the base.