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