Overwintering guide
How to overwinter dwarf bearded iris
Winter watering
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
The mistake that kills dwarf bearded iris in winter
Cutting dwarf bearded iris 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 dwarf bearded iris care
Overwintering dwarf bearded iris — FAQ
Does dwarf bearded iris need to come indoors for winter?
Dwarf Bearded Iris is hardy to roughly USDA zone 4 — winter lows around -34°C. That means it can stay outside all winter in most temperate gardens. Dwarf Bearded Iris 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 dwarf bearded iris for winter?
Tidy and mulch in late autumn; leave the plant undisturbed until spring.
How often should I water dwarf bearded iris in winter?
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
What kills dwarf bearded iris over winter?
Cutting dwarf bearded iris 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.