Overwintering guide
How to overwinter horned eriosyce
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 horned eriosyce in winter
Bringing horned eriosyce 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 horned eriosyce care
Overwintering horned eriosyce — FAQ
Does horned eriosyce need to come indoors for winter?
Horned Eriosyce is hardy to roughly USDA zone 9 — winter lows around -7°C. That means it takes cool conditions but not a real freeze. Horned Eriosyce 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 horned eriosyce for winter?
Move under cover before the first hard frost; back outside after the last spring frost.
How often should I water horned eriosyce in winter?
Water only occasionally — enough that the rootball never dries out completely, no more. No feeding until spring growth begins.
What kills horned eriosyce over winter?
Bringing horned eriosyce 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.