Overwintering guide
How to overwinter purple poppy mallow
Winter watering
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
The mistake that kills purple poppy mallow in winter
Cutting purple poppy mallow 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 purple poppy mallow care
Overwintering purple poppy mallow — FAQ
Does purple poppy mallow need to come indoors for winter?
Purple Poppy Mallow is hardy to roughly USDA zone 4 — winter lows around -34°C. That means it can stay outside all winter in most temperate gardens. Purple Poppy Mallow 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 purple poppy mallow for winter?
Tidy and mulch in late autumn; leave the plant undisturbed until spring.
How often should I water purple poppy mallow in winter?
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
What kills purple poppy mallow over winter?
Cutting purple poppy mallow 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.