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