Sisyrinchium atlanticum aka Eastern Blue Eyed Grass

Sisyrinchium atlanticum is known as eastern blue-eyed grass. It belongs to the iris family, despite its grass-like leaves. This perennial grows in eastern Canada and the United States. Its range includes the southeastern states. It lives in meadows, near marshes, and along shores. It also grows in woods with ample light and moisture. Some parts of the Midwest list it as threatened or endangered.

Plants form upright clumps with a medium growth rate. They reach 0.5–1.5 feet [0.15–0.46 metres] tall. Clumps spread about 0.5–0.67 feet [0.15–0.20 metres] wide. The pale green leaves grow from the base. Each narrow blade measures about 0.33–0.67 feet [0.10–0.20 metres] long. Leaves have smooth edges and lack hairs. The flat, smooth stems have narrow wings and seem branched. Flower stems rise above the basal leaves. Their tips carry loose flower clusters called cymes.

Flowers appear from March to June, opening one at a time. Each stem bears one to four blooms. Most flowers are blue or violet, though some are white. Each star-shaped bloom spans less than 0.083 feet [0.025 metres]. Its six tepals comprise three petals and three similar sepals. Each tepal has a rounded end with a sharp point. Bright marks at their bases surround a green-to-yellow throat. Yellow stamens stand in the centre. Capsules appear from June to August on thin stalks. They split as they dry, showing two or more smooth black seeds.

Grow this plant in full sun and moist, sandy soil. Choose a site that drains well rather than holding standing water. It accepts acid to neutral soil. Dry soil and drought do not suit it. NC State lists it for USDA zones 4–10. It also notes tolerance of salt and salt spray. Gardeners can raise new plants from seed or divide existing clumps. The source rates its maintenance needs as medium.

Its small size suits borders, path edges, and grouped plantings. It also fits native gardens, rain gardens, and moist meadows. Pond margins and coastal sites offer other planting options. Both the flowers and summer capsules add garden interest. Birds and bees visit the plant, supporting wildlife-focused gardens. NC State reports no major pest or disease problems. The supplied sources give no food uses or safety guidance.