Symphyotrichum laeve

Common name: Smooth Blue Aster

Native plant

Smooth Blue Aster produces large panicles of light blue to light purple flowers at its terminal end with smaller panicles protruding from axils below. Each individual flower is up to an inch in diameter.  As with most asters, it blooms late summer to early fall, lasts 3 to 4 weeks, and attracts a wide range of bees, butterflies and other pollinators looking for their last bit of nectar and pollen for the season.  It has attractive blue-gray, smooth foliage, and is adaptable to most garden conditions. Will spread prolifically by seed.


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Price Level: 
Perennial- Standard
Sizing Options: 
Flat of 32 (plugs)
Flat of 18 (pints)
1 Gallon


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Plant Details

Plant type


Soil type

Dry Mesic, Mesic (Not too Wet Not too Dry), Moist Mesic

Light exposure

Full Sun, Partial Sun / Part Shade

Bloom period


Urban environment

Compacted/New Construction Soils, Yards that Flood


Prairie Grasslands

Growth form

Colonizing / Spreading

Growth rate


Flower color

Light Blue

Fall color

Yellow Orange


Mature height
3 Feet
Mature width
3 Feet
Max height
5 Feet
Max width
4 Feet

Additional information

Butterfly host plant Pollinator hot spot

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