Perennials

Sisyrinchium angustifolium 'Lucerne'

Lucerne blue-eyed grass

Sisyrinchium angustifolium 'Lucerne', Photo courtesy of Walters Gardens, Inc. Web-size image

Purplish-blue stars rise above short, grasslike leaves. A small iris relative for edging paths and rock gardens. Grow in average to rich soil with good drainage.

At a glance

Sun: Full sun to part shade
Mature size: 10 in. tall × 15 in. wide
Water: Moderate; evenly moist
Hardiness: USDA zones 5–8
Bloom: Purplish blue; late spring–early summer, sometimes later.

Sizes & prices

4.5"$9.99
6"$14.99

Catalog updated September 8, 2026. This is not a live stock count; please call to confirm availability and price.

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Resistance & tolerances

Drought: Keep evenly moist; not a dry-site choice.
Wet soil: Moist, well-drained soil; avoid waterlogging.

Seasonal interest

Form: Slowly spreading clump; not a true grass.

Growing & care

Division: Divide thick clumps after flowering if needed.

Sources & photo credits

Walters Gardens

Photo: Walters Gardens, Inc. · Authorized promotional use

Image notes: Sisyrinchium angustifolium 'Lucerne', Photo courtesy of Walters Gardens, Inc. Web-size image; uncropped.

Reviewed September 19, 2026. Growing conditions vary by location.