Blue Oat Grass plant profile
Helictotrichon sempervirens
A perennial grass for full sun.
Last updated .
When to plant
When to plant Blue Oat Grass
Blue oat grass is a cool-season, semi-evergreen clumping perennial grass grown for its blue foliage and established by division. Set out new plants or divisions in spring as growth resumes; NC State notes the best blue color appears in dry, well-drained conditions.
The calendar shows this cited seasonal window as an approximate band. It does not convert the season into frost-adjusted dates.
Open Blue Oat Grass in my garden calendarShows the source-backed planting season, not frost-adjusted dates.
Growing conditions
- Sun
- Full sun
- Lifecycle
- Perennial
- Spacing
- 12 to 36 in apart
- Hardiness
- Zones 4a to 8bFind my hardiness zone
Next steps
Continue with Blue Oat Grass
Evidence trail
Evidence behind this profile
Original extension and institutional publications behind the planting, care, and safety facts on this page.
- Helictotrichon sempervirens (Blue Oats Grass)
North Carolina Extension Gardener Plant Toolbox (NC State Extension). Supports general reference. Checked 2026-06-18.