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