Overwintering guide
How to overwinter black knight butterfly bush
Winter watering
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
The mistake that kills black knight butterfly bush in winter
Cutting black knight butterfly bush 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 black knight butterfly bush care
- Overwintering butterfly bush — the species this cultivar belongs to
- Full black knight butterfly bush care guide
- Black Knight Butterfly Bush temperature range
- How often to water black knight butterfly bush
- How to prune black knight butterfly bush
- Common black knight butterfly bush problems & fixes
- Best plant identifier apps — tested and ranked
Overwintering black knight butterfly bush — FAQ
Does black knight butterfly bush need to come indoors for winter?
Black Knight Butterfly Bush is hardy to roughly USDA zone 5 — winter lows around -29°C. That means it can stay outside all winter in most temperate gardens. Black Knight Butterfly Bush 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 black knight butterfly bush for winter?
Tidy and mulch in late autumn; leave the plant undisturbed until spring.
How often should I water black knight butterfly bush in winter?
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
What kills black knight butterfly bush over winter?
Cutting black knight butterfly bush 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.