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