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