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