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Aster azureus

Sky Blue Aster / Symphyotrichum oolentangiense

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This hardy native plant lights up the autumn garden with it's brilliant pale blue blooms. Found throughout the tallgrass prairie, Sky Blue Aster has addapted to a wide variety of locations from wet meadows to dry gravel outcrops. This is good news for the gardener because it will be happy in any sunny location! Attractive to butterflies and other nectar-loving insects.

Benefits

Outstanding blue-lavender daisy-like flowers
Loves full sun and is drought tolerant
Forms superb garden backdrop when planted in groups
Great food source for butterflies and birds
Attracts larger fowl to garden in late fall
Colorful blooms are great in fresh arrangements

Homeowner Growing and Maintenance Tips

Plant in average, dry or moist, well-drained soil in full sun. Sky Blue Aster is rather indifferent to soil characteristics, and can flourish in soil that is loamy, sandy, rocky, or contains clay. It is easy to grow and very drought tolerant, though it may get powdery mildew on lower leaves after experiencing drought stress.


Height
2-3 Feet

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Spread
24-30 Inches

USDA Hardiness Zone 3-9

Native Range

Aster azureus is found in dry or moist prairies, meadows, open woods, and rocky slopes from New York and Ontario to Saskatchewan and Minnesota south to Georgia, Alabama, Louisiana, and Texas.

Native Trivia

Late blooming asters are an important food source for butterflies and other beneficial insects in autumn.


"The caterpillars of the Silvery Checkerspot butterfly (Chlosyne nycteis) feed on this aster and its flowers provide nectar for many species of other butterflies."

Good Companions
Little Bluestem (Schizachyrium scoparium), Big Bluestem (Andropogon gerardii), Pink Muhlygrass (Muhlenbergia capillaris), Perennial Sunflower (Helianthus pauciflorus var. subrhomboideus x tuberosus)

Characteristics & Attributes

Plan Sub Group
Medium Perennials
Exposure
Filtered Shade
Sun
Soil
Well-drained
Wide soil tolerance
Soil Moisture Preference
Average
Dry
Moist
Moist but well-drained
Attracts Wildlife
Beneficial insects
Butterflies
Bloom Time
Fall
Habitat Collection
Butterfly
Native Habitat
Grassland
Foliage Color
Green
Uses
Border
Container
Cut or dried flower
Mass plant
Meadow
Naturalizes
Wind tolerant
Native to
Alabama
Arkansas
Florida
Georgia
Illinois
Indiana
Iowa
Kansas
Louisiana
Michigan
Minnesota
Mississippi
Missouri
Nebraska
New York
North Carolina
Ohio
Oklahoma
South Dakota
Tennessee
Texas
Wisconsin