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