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