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