Overwintering guide
How to overwinter plains coreopsis
Winter watering
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
The mistake that kills plains coreopsis in winter
Cutting plains coreopsis 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 plains coreopsis care
Overwintering plains coreopsis — FAQ
Does plains coreopsis need to come indoors for winter?
Plains Coreopsis is hardy to roughly USDA zone 2 — winter lows around -46°C. That means it can stay outside all winter in most temperate gardens. Plains Coreopsis 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 plains coreopsis for winter?
Tidy and mulch in late autumn; leave the plant undisturbed until spring.
How often should I water plains coreopsis in winter?
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
What kills plains coreopsis over winter?
Cutting plains coreopsis 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.