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