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