Overwintering guide
How to overwinter agapanthus 'navy blue'
Winter watering
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
The mistake that kills agapanthus 'navy blue' in winter
Cutting agapanthus 'navy 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 agapanthus 'navy blue' care
Overwintering agapanthus 'navy blue' — FAQ
Does agapanthus 'navy blue' need to come indoors for winter?
Agapanthus 'Navy Blue' is hardy to roughly USDA zone 7 — winter lows around -18°C. That means it can stay outside all winter in most temperate gardens. Agapanthus 'Navy 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 agapanthus 'navy blue' for winter?
Tidy and mulch in late autumn; leave the plant undisturbed until spring.
How often should I water agapanthus 'navy blue' in winter?
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
What kills agapanthus 'navy blue' over winter?
Cutting agapanthus 'navy 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.