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