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