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