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