Iridaceae
Sisyrinchium idahoense
Sisyrinchium idahoense
Flowering Plants · Native Plants · Sisyrinchium · Blue-Eyed Grass · Native Perennial · Iridaceae · Blue Flowers · Moist Soil · Wildflower · Pacific Northwest · Pollinator · Rock Garden
Idaho blue-eyed grass is a charming, grass-like native perennial from the iris family that produces small, vivid blue-violet flowers with yellow centers in late spring and early summer. It grows best in moist, well-drained soils with partial to full sun and is an excellent addition to rain gardens, pond margins, or naturalized borders. Very low maintenance once established, it self-seeds gently to form attractive clumps over time.
Growing conditions
The details behind the basics
- Daily light
- 5 hours
- Watering
- Water moderately; keep soil consistently moist especially during active growth · Every 7-10 days
- Maintenance
- Low
- Soil
- loam
- Soil pH
- 6.4–8.2
- Temperature
- -25°F to 95°F
- Cycle
- Perennial
- Propagation
- Seed, Division, Cutting
Hardiness
USDA 4b-9b
Form & growth
Mature size and habit
- Mature height
- 12 in – 4 ft
- Spread
- 4 ft
- Spacing
- 8 in apart
- Growth rate
- Moderate
- Root depth
- Medium
- Flowers
- Blue
- Foliage
- Yellow · Fine
Ecology & origin
Where it belongs and what it brings
- Native to
- Arizona, British Columbia, California, Colorado, Idaho, Montana, Nevada, New Mexico, Oregon, Utah, Washington, Wyoming
- Attracts
- Bees, Butterflies
Sources: trefle, usda
More Sisyrinchium
Related plants from the same genus
Sisyrinchium idahoense var. macounii
Sisyrinchium idahoense var. macounii
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Narrow-leaf blue-eyed-grass
Sisyrinchium angustifolium
Partial Sun · Moderate · Moderate
Sisyrinchium idahoense var. occidentale
Sisyrinchium idahoense var. occidentale
Partial Sun · Moderate · Moderate
Sisyrinchium idahoense var. segetum
Sisyrinchium idahoense var. segetum
Partial Sun · Moderate · Moderate
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