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