Smooth Blue Aster

Symphyotrichum laeve

Important late-season bloomer and pollinator favorite. Birds love the seeds. Can handle moist or dry soils. The tough stem often takes on a shade of blue and will allow Smooth Blue Aster to stand tall. A non-aggressive rhizomatous root system allows the plant to spread slowly. Long-lived. Hardy to zone 3.

Plant Details

Native Range: Native to western CO and most of the lower 48
Height: up to 4 feet
Spacing: 18” – 24”
Water Needs: Moderate
Soil: Grows in a wide range of soil types
Sunlight: Sun or part shade
Bloom Time: August-October
USDA Zone: 3-9
Life Cycle: Perennial