Overwintering guide
How to overwinter snow-in-summer
Winter watering
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
The mistake that kills snow-in-summer in winter
Cutting snow-in-summer 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 snow-in-summer care
Overwintering snow-in-summer — FAQ
Does snow-in-summer need to come indoors for winter?
Snow-in-Summer is hardy to roughly USDA zone 3 — winter lows around -40°C. That means it can stay outside all winter in most temperate gardens. Snow-in-Summer 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 snow-in-summer for winter?
Tidy and mulch in late autumn; leave the plant undisturbed until spring.
How often should I water snow-in-summer in winter?
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
What kills snow-in-summer over winter?
Cutting snow-in-summer 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.