Overwintering guide
How to overwinter coast rock cress
Winter watering
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
The mistake that kills coast rock cress in winter
Cutting coast rock cress 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 coast rock cress care
Overwintering coast rock cress — FAQ
Does coast rock cress need to come indoors for winter?
Coast Rock Cress is hardy to roughly USDA zone 7 — winter lows around -18°C. That means it can stay outside all winter in most temperate gardens. Coast Rock Cress 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 coast rock cress for winter?
Tidy and mulch in late autumn; leave the plant undisturbed until spring.
How often should I water coast rock cress in winter?
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
What kills coast rock cress over winter?
Cutting coast rock cress 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.