Overwintering guide
How to overwinter agapanthus 'midnight 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 'midnight blue' in winter
Cutting agapanthus 'midnight 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 'midnight blue' care
Overwintering agapanthus 'midnight blue' — FAQ
Does agapanthus 'midnight blue' need to come indoors for winter?
Agapanthus 'Midnight 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 'Midnight 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 'midnight blue' for winter?
Tidy and mulch in late autumn; leave the plant undisturbed until spring.
How often should I water agapanthus 'midnight blue' in winter?
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
What kills agapanthus 'midnight blue' over winter?
Cutting agapanthus 'midnight 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.