Overwintering guide
How to overwinter euphorbia caput-medusae
Winter watering
Water only occasionally — enough that the rootball never dries out completely, no more. No feeding until spring growth begins.
The mistake that kills euphorbia caput-medusae in winter
Bringing euphorbia caput-medusae into a warm living room. Too much winter warmth forces weak, pale growth that collapses when it goes back outside — cool and bright beats warm and dim.
More euphorbia caput-medusae care
Overwintering euphorbia caput-medusae — FAQ
Does euphorbia caput-medusae need to come indoors for winter?
Euphorbia caput-medusae is hardy to roughly USDA zone 9 — winter lows around -7°C. That means it takes cool conditions but not a real freeze. Euphorbia caput-medusae will take cool conditions but not a hard freeze, so the aim is a frost-free winter rather than a warm one. An unheated greenhouse, porch, conservatory or bright garage all work well. Keep it cool, bright and on the dry side, and it will hold steady until growth restarts in spring.
When should I move euphorbia caput-medusae for winter?
Move under cover before the first hard frost; back outside after the last spring frost.
How often should I water euphorbia caput-medusae in winter?
Water only occasionally — enough that the rootball never dries out completely, no more. No feeding until spring growth begins.
What kills euphorbia caput-medusae over winter?
Bringing euphorbia caput-medusae into a warm living room. Too much winter warmth forces weak, pale growth that collapses when it goes back outside — cool and bright beats warm and dim.