Western blue-eyed grass is a small, grass-like perennial native to California, Oregon and Baja California, with bright blue-purple flowers in spring. It thrives in open, moist grassland with good drainage and tolerates summer dryness, since it dies back to the ground in summer.
Family
Iridaceae (Iris family)
Grows as
Grass, Perennial
Light
Full sun, Part shade
Water
Water regularly through spring, then allow to dry out in summer; good drainage is key.
Soil
Well-drained soil, loam or sandy loam.
Temperature
Hardy to about -7 °C (20 °F); protect from hard freezes in containers.
How easy
Easy
Native range
Oregon to Mexico (Baja California)
Climate
temperate
About
Sisyrinchium bellum, the western blue-eyed grass or Californian blue-eyed grass, is the common blue-eyed grass of California and Oregon in and west of the Sierra Nevada, its range extending south into Baja California. In parts of its range, western blue-eyed grass has previously been classified as Sisyrinchium eastwoodiae, S. greenei and S. hesperium, but these names are now considered synonyms.
Sisyrinchium bellum grows as a perennial plant in open places where there is some moisture, particularly grassy areas, though it can also be found in woodlands and at altitudes up to 2,400 metres (7,900 ft). Like other species of blue-eyed grasses that are locally dominant, it is generally known simply as "blue-eyed grass" within its natural range.
How to grow it
Sisyrinchium bellum prefers some moisture and good drainage, but will tolerate summer dryness. It can be propagated by seed, and it self-sows. It can also be propagated by division of its rhizomes, and the flower stems can be rooted. It is moderately hardy and will tolerate temperatures down to 20 °F (−7 °C).
Uses
The Ohlone used an infusion of the roots and leaves as a cure for indigestion and stomach pain, and similar uses are recorded from other Native American peoples.
Text excerpted from the Wikipedia article Sisyrinchium bellum by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.