Overwintering guide
How to overwinter japanese kerria
Winter watering
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
The mistake that kills japanese kerria in winter
Cutting japanese kerria hard back in autumn "to tidy up". That removes the growth that shelters the crown, and on some plants removes next season's flower buds entirely.
More japanese kerria care
Overwintering japanese kerria — FAQ
Does japanese kerria need to come indoors for winter?
Japanese kerria is hardy to roughly USDA zone 4 — winter lows around -34°C. That means it can stay outside all winter in most temperate gardens. Japanese kerria is properly hardy and overwinters outside without fuss. Tidy away anything dead or diseased, apply a mulch over the crown to steady soil temperatures, and otherwise leave it alone — many hardy plants actually need a cold period to flower and grow well the following year. Save hard pruning for the right season rather than doing it in autumn.
When should I move japanese kerria for winter?
Tidy and mulch in late autumn; leave the plant undisturbed until spring.
How often should I water japanese kerria in winter?
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
What kills japanese kerria over winter?
Cutting japanese kerria hard back in autumn "to tidy up". That removes the growth that shelters the crown, and on some plants removes next season's flower buds entirely.