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