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