Overwintering guide
How to overwinter perforate st john's-wort
Winter watering
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
The mistake that kills perforate st john's-wort in winter
Cutting perforate st john's-wort 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 perforate st john's-wort care
- Overwintering st. john's wort — the species this cultivar belongs to
- Full perforate st john's-wort care guide
- Perforate St John's-wort temperature range
- How often to water perforate st john's-wort
- How to prune perforate st john's-wort
- Common perforate st john's-wort problems & fixes
- Best plant identifier apps — tested and ranked
Overwintering perforate st john's-wort — FAQ
Does perforate st john's-wort need to come indoors for winter?
Perforate St John's-wort is hardy to roughly USDA zone 5 — winter lows around -29°C. That means it can stay outside all winter in most temperate gardens. Perforate St John's-wort 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 perforate st john's-wort for winter?
Tidy and mulch in late autumn; leave the plant undisturbed until spring.
How often should I water perforate st john's-wort in winter?
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
What kills perforate st john's-wort over winter?
Cutting perforate st john's-wort 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.