Overwintering guide
How to overwinter hardy geranium 'rozanne'
Winter watering
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
The mistake that kills hardy geranium 'rozanne' in winter
Cutting hardy geranium 'rozanne' 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 hardy geranium 'rozanne' care
Overwintering hardy geranium 'rozanne' — FAQ
Does hardy geranium 'rozanne' need to come indoors for winter?
Hardy Geranium 'Rozanne' is hardy to roughly USDA zone 5 — winter lows around -29°C. That means it can stay outside all winter in most temperate gardens. Hardy Geranium 'Rozanne' 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 hardy geranium 'rozanne' for winter?
Tidy and mulch in late autumn; leave the plant undisturbed until spring.
How often should I water hardy geranium 'rozanne' in winter?
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
What kills hardy geranium 'rozanne' over winter?
Cutting hardy geranium 'rozanne' 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.