Overwintering guide
How to overwinter eryngium 'jade frost'
Winter watering
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
The mistake that kills eryngium 'jade frost' in winter
Cutting eryngium 'jade frost' 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 eryngium 'jade frost' care
- Overwintering sea holly — the species this cultivar belongs to
- Full eryngium 'jade frost' care guide
- Eryngium 'Jade Frost' temperature range
- How often to water eryngium 'jade frost'
- How to prune eryngium 'jade frost'
- Common eryngium 'jade frost' problems & fixes
- Best plant identifier apps — tested and ranked
Overwintering eryngium 'jade frost' — FAQ
Does eryngium 'jade frost' need to come indoors for winter?
Eryngium 'Jade Frost' is hardy to roughly USDA zone 4 — winter lows around -34°C. That means it can stay outside all winter in most temperate gardens. Eryngium 'Jade Frost' 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 eryngium 'jade frost' for winter?
Tidy and mulch in late autumn; leave the plant undisturbed until spring.
How often should I water eryngium 'jade frost' in winter?
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
What kills eryngium 'jade frost' over winter?
Cutting eryngium 'jade frost' 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.