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