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