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