Overwintering guide
How to overwinter sapphire blue oat grass
Winter watering
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
The mistake that kills sapphire blue oat grass in winter
Cutting sapphire blue oat grass 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 sapphire blue oat grass care
- Overwintering blue oat grass — the species this cultivar belongs to
- Full sapphire blue oat grass care guide
- Sapphire Blue Oat Grass temperature range
- How often to water sapphire blue oat grass
- How to prune sapphire blue oat grass
- Common sapphire blue oat grass problems & fixes
- Best plant identifier apps — tested and ranked
Overwintering sapphire blue oat grass — FAQ
Does sapphire blue oat grass need to come indoors for winter?
Sapphire Blue Oat Grass is hardy to roughly USDA zone 4 — winter lows around -34°C. That means it can stay outside all winter in most temperate gardens. Sapphire Blue Oat Grass 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 sapphire blue oat grass for winter?
Tidy and mulch in late autumn; leave the plant undisturbed until spring.
How often should I water sapphire blue oat grass in winter?
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
What kills sapphire blue oat grass over winter?
Cutting sapphire blue oat grass 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.