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