Overwintering guide
How to overwinter white wood aster
Winter watering
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
The mistake that kills white wood aster in winter
Cutting white wood aster 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 white wood aster care
- Overwintering white wood aster — the species this cultivar belongs to
- Overwintering white wood aster — our other guide for the same plant
- Full white wood aster care guide
- White Wood Aster temperature range
- How often to water white wood aster
- How to prune white wood aster
- Common white wood aster problems & fixes
- Best plant identifier apps — tested and ranked
Overwintering white wood aster — FAQ
Does white wood aster need to come indoors for winter?
White Wood Aster is hardy to roughly USDA zone 3 — winter lows around -40°C. That means it can stay outside all winter in most temperate gardens. White Wood Aster 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 white wood aster for winter?
Tidy and mulch in late autumn; leave the plant undisturbed until spring.
How often should I water white wood aster in winter?
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
What kills white wood aster over winter?
Cutting white wood aster 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.