Perennial flower
Blue-eyed Grass plant profile
Sisyrinchium angustifolium
A perennial flower for full sun.
Last updated .
When to plant
When to plant Blue-eyed Grass
An iris-family perennial that grows from rhizomes in full sun to partial shade and likes moist to average soil; it does not tolerate drought or dry soil. Propagate by seed or division, and divide every few years to keep plants healthy.
The calendar shows this cited seasonal window as an approximate band. It does not convert the season into frost-adjusted dates.
Open Blue-eyed Grass in my garden calendarShows the source-backed planting season, not frost-adjusted dates.
Growing conditions
- Sun
- Full sun
- Lifecycle
- Perennial
- Spacing
- 6 to 12 in apart
- Hardiness
- Zones 4a to 9bFind my hardiness zone
Next steps
Continue with Blue-eyed Grass
Evidence trail
Evidence behind this profile
Original extension and institutional publications behind the planting, care, and safety facts on this page.
- Sisyrinchium angustifolium (Blue-eyed Grass, Narrowleaf Blue-eyed Grass)
NC State Extension Gardener Plant Toolbox. Supports general reference. Checked 2026-06-18.