Overwintering guide
How to overwinter summer skies delphinium
Winter watering
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
The mistake that kills summer skies delphinium in winter
Cutting summer skies delphinium 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 summer skies delphinium care
- Overwintering candle larkspur — the species this cultivar belongs to
- Full summer skies delphinium care guide
- Summer Skies delphinium temperature range
- How often to water summer skies delphinium
- How to prune summer skies delphinium
- Common summer skies delphinium problems & fixes
- Best plant identifier apps — tested and ranked
Overwintering summer skies delphinium — FAQ
Does summer skies delphinium need to come indoors for winter?
Summer Skies delphinium is hardy to roughly USDA zone 3 — winter lows around -40°C. That means it can stay outside all winter in most temperate gardens. Summer Skies delphinium 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 summer skies delphinium for winter?
Tidy and mulch in late autumn; leave the plant undisturbed until spring.
How often should I water summer skies delphinium in winter?
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
What kills summer skies delphinium over winter?
Cutting summer skies delphinium 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.