Overwintering guide
How to overwinter lupinus 'manhattan lights'
Winter watering
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
The mistake that kills lupinus 'manhattan lights' in winter
Cutting lupinus 'manhattan lights' 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 lupinus 'manhattan lights' care
Overwintering lupinus 'manhattan lights' — FAQ
Does lupinus 'manhattan lights' need to come indoors for winter?
Lupinus 'Manhattan Lights' is hardy to roughly USDA zone 4 — winter lows around -34°C. That means it can stay outside all winter in most temperate gardens. Lupinus 'Manhattan Lights' 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 lupinus 'manhattan lights' for winter?
Tidy and mulch in late autumn; leave the plant undisturbed until spring.
How often should I water lupinus 'manhattan lights' in winter?
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
What kills lupinus 'manhattan lights' over winter?
Cutting lupinus 'manhattan lights' 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.