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