Overwintering guide
How to overwinter cupani sweet pea
Winter watering
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
The mistake that kills cupani sweet pea in winter
Cutting cupani sweet pea 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 cupani sweet pea care
Overwintering cupani sweet pea — FAQ
Does cupani sweet pea need to come indoors for winter?
Cupani sweet pea is hardy to roughly USDA zone 2 — winter lows around -46°C. That means it can stay outside all winter in most temperate gardens. Cupani sweet pea 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 cupani sweet pea for winter?
Tidy and mulch in late autumn; leave the plant undisturbed until spring.
How often should I water cupani sweet pea in winter?
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
What kills cupani sweet pea over winter?
Cutting cupani sweet pea 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.