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