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