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