Sky-blue Aster

Sky Blue Aster

Symphyotrichum oolentangiense

A beautiful prairie and savanna wildflower known for its soft sky-blue flowers that appear in late summer and early autumn. Sky Blue Aster forms bushy clumps with many branching stems, each carrying delicate star-shaped blooms with bright golden centers. The flowers create a light cloud of blue that brightens open landscapes just as the growing season begins to transition toward fall.

 

 

A Wildflower of Prairies and Open Slopes

Sky Blue Aster grows naturally in dry prairies, open woodlands, savannas, and rocky slopes where it receives full sun and well-drained soil. It is particularly well suited to prairie restoration and native meadow plantings where it blends beautifully with native grasses and other fall-blooming species.

Planting Waabishki-bag strengthens late-season pollinator resources and adds gentle autumn color to native landscapes.

Growing Information

Height: 1–3 ft

Spread: 1–2 ft

Light: Full sun

Soil: Dry to medium, well-drained soils

Hardiness: Zone 3–8

Growth Rate: Moderate

Best planted in prairie gardens, dry meadows, savanna restorations, and pollinator gardens where it can naturalize among grasses and other wildflowers.

Ecological Importance

 

Provides critical late-season nectar for bees and butterflies

Supports pollinators preparing for winter

Adds seasonal color and diversity to prairie ecosystems

Strengthens biodiversity in open grassland habitats

Larval host for
• Pearl Crescent Butterfly (Phyciodes tharos)
• Silvery Checkerspot (Chlosyne nycteis)
• Wavy-lined Emerald Moth (Synchlora aerata)
• Harris’s Three-spot Moth (Harrisimemna trisignata)

Planting to Protect
Restoring to Thrive ?
Origin Native Plants ?

3.5 inch Pots