Overwintering guide
How to overwinter coreopsis 'route 66'
Winter watering
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
The mistake that kills coreopsis 'route 66' in winter
Cutting coreopsis 'route 66' 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 coreopsis 'route 66' care
Overwintering coreopsis 'route 66' — FAQ
Does coreopsis 'route 66' need to come indoors for winter?
Coreopsis 'Route 66' is hardy to roughly USDA zone 4 — winter lows around -34°C. That means it can stay outside all winter in most temperate gardens. Coreopsis 'Route 66' 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 coreopsis 'route 66' for winter?
Tidy and mulch in late autumn; leave the plant undisturbed until spring.
How often should I water coreopsis 'route 66' in winter?
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
What kills coreopsis 'route 66' over winter?
Cutting coreopsis 'route 66' 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.