Overwintering guide
How to overwinter oak leaf lettuce
Winter watering
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
The mistake that kills oak leaf lettuce in winter
Cutting oak leaf lettuce 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 oak leaf lettuce care
Overwintering oak leaf lettuce — FAQ
Does oak leaf lettuce need to come indoors for winter?
Oak Leaf Lettuce is hardy to roughly USDA zone 2 — winter lows around -46°C. That means it can stay outside all winter in most temperate gardens. Oak Leaf Lettuce 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 oak leaf lettuce for winter?
Tidy and mulch in late autumn; leave the plant undisturbed until spring.
How often should I water oak leaf lettuce in winter?
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
What kills oak leaf lettuce over winter?
Cutting oak leaf lettuce 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.