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