Overwintering guide
How to overwinter lilac 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 lilac trumpet vine in winter
Bringing lilac 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 lilac trumpet vine care
Overwintering lilac trumpet vine — FAQ
Does lilac trumpet vine need to come indoors for winter?
Lilac 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. Lilac 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 lilac trumpet vine for winter?
Move under cover before the first hard frost; back outside after the last spring frost.
How often should I water lilac 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 lilac trumpet vine over winter?
Bringing lilac 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.