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