Overwintering guide
How to overwinter goldencup 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 goldencup st. john's wort in winter
Cutting goldencup 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 goldencup st. john's wort care
Overwintering goldencup st. john's wort — FAQ
Does goldencup st. john's wort need to come indoors for winter?
Goldencup St. John's Wort is hardy to roughly USDA zone 6 — winter lows around -23°C. That means it can stay outside all winter in most temperate gardens. Goldencup 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 goldencup st. john's wort for winter?
Tidy and mulch in late autumn; leave the plant undisturbed until spring.
How often should I water goldencup 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 goldencup st. john's wort over winter?
Cutting goldencup 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.