Overwintering guide
How to overwinter hydrangea 'nikko blue'
Winter watering
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
The mistake that kills hydrangea 'nikko blue' in winter
Cutting hydrangea 'nikko blue' 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 hydrangea 'nikko blue' care
- Overwintering hydrangea — the species this cultivar belongs to
- Full hydrangea 'nikko blue' care guide
- Hydrangea 'Nikko Blue' temperature range
- How often to water hydrangea 'nikko blue'
- How to prune hydrangea 'nikko blue'
- Common hydrangea 'nikko blue' problems & fixes
- Best plant identifier apps — tested and ranked
Overwintering hydrangea 'nikko blue' — FAQ
Does hydrangea 'nikko blue' need to come indoors for winter?
Hydrangea 'Nikko Blue' is hardy to roughly USDA zone 6 — winter lows around -23°C. That means it can stay outside all winter in most temperate gardens. Hydrangea 'Nikko Blue' 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 hydrangea 'nikko blue' for winter?
Tidy and mulch in late autumn; leave the plant undisturbed until spring.
How often should I water hydrangea 'nikko blue' in winter?
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
What kills hydrangea 'nikko blue' over winter?
Cutting hydrangea 'nikko blue' 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.