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Narrowleaf Blue-Eyed Grass

Sisyrinchium angustifolium

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Narrowleaf Blue-Eyed Grass (Sisyrinchium angustifolium) at Patuxent Nursery

Narrowleaf Blue-Eyed Grass flowers

Narrowleaf Blue-Eyed Grass flowers

(Photo courtesy of NetPS Plant Finder)

Narrowleaf Blue-Eyed Grass (Sisyrinchium angustifolium) at Patuxent Nursery

Narrowleaf Blue-Eyed Grass in bloom

Narrowleaf Blue-Eyed Grass in bloom

(Photo courtesy of NetPS Plant Finder)

Height:  12 inches

Spread:  12 inches

Sunlight:  full sun  partial shade 

Hardiness Zone:  3

Other Names:  Sisyrinchium bermudianum


Native through most of eastern North American, this species is an exciting flower for the garden as well as naturalizing with its exquisite violet blue flowers; not actually a grass, but it is a close cousin to the familiar garden iris

Ornamental Features

Narrowleaf Blue-Eyed Grass has masses of beautiful violet star-shaped flowers with blue overtones, lemon yellow eyes and lavender veins at the ends of the stems from late spring to early summer, which are most effective when planted in groupings. Its glossy narrow leaves remain dark green in color throughout the season. The fruit is not ornamentally significant.

Landscape Attributes

Narrowleaf Blue-Eyed Grass is an herbaceous perennial with an upright spreading habit of growth. Its medium texture blends into the garden, but can always be balanced by a couple of finer or coarser plants for an effective composition.

This is a high maintenance plant that will require regular care and upkeep, and should only be pruned after flowering to avoid removing any of the current season's flowers. It is a good choice for attracting butterflies and hummingbirds to your yard, but is not particularly attractive to deer who tend to leave it alone in favor of tastier treats. Gardeners should be aware of the following characteristic(s) that may warrant special consideration;

  • Self-Seeding

Narrowleaf Blue-Eyed Grass is recommended for the following landscape applications;

  • Mass Planting
  • Rock/Alpine Gardens
  • General Garden Use
  • Naturalizing And Woodland Gardens
  • Container Planting

Planting & Growing

Narrowleaf Blue-Eyed Grass will grow to be about 10 inches tall at maturity, with a spread of 12 inches. Its foliage tends to remain low and dense right to the ground. It grows at a medium rate, and under ideal conditions can be expected to live for approximately 10 years.

This plant does best in full sun to partial shade. It prefers to grow in average to moist conditions, and shouldn't be allowed to dry out. It is not particular as to soil pH, but grows best in sandy soils. It is somewhat tolerant of urban pollution. This species is native to parts of North America. It can be propagated by division.

Narrowleaf Blue-Eyed Grass is a fine choice for the garden, but it is also a good selection for planting in outdoor pots and containers. It is often used as a 'filler' in the 'spiller-thriller-filler' container combination, providing a mass of flowers against which the larger thriller plants stand out. Note that when growing plants in outdoor containers and baskets, they may require more frequent waterings than they would in the yard or garden.

Hardiness Zone Plant Height Minimum Sunlight
Massing  Rock  Garden  Naturalizing  Container 
Flowers  Attracts Wildlife 
Ornamental Features