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