Aster laevis flowers with drops of water.
Close up of aster laevis (smooth blue aster) flowers.
Aster laevis (smooth blue aster) growing in a greenhouse.
Aster laevis (smooth blue aster) growing in landscape plug trays.

Symphyotrichum laeve (Aster laevis) (Smooth Blue Aster) Unity Grown

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Symphyotrichum laeve (syn. Aster laevis), also called smooth blue aster, is a hardy native perennial wildflower noted for its robust, upright stems and late summer to fall bloom period, with blue to purple flowers that start opening in August and can sometimes extend to November. A prime larval host for key butterfly species, smooth blue aster flowers are also valuable to other pollinators and birds.

Symphyotrichum laeve can grow to between two and four feet tall, and grows best in average soil of medium moisture, and especially in full sun, making smooth blue aster a great addition to open meadows and open woodlands, as well as pollinator gardens and border plantings.

Native to Maryland, Native to U.S., and Straight Species
Mature Plant Height: Medium: 30-48"
Sun (6+ hours) and Part Shade/Sun (4-6 hours of sun)
Soil Moisture: Medium to Dry and Well-drained
Soil Type: Wide Tolerance and Average
Bloom Time: Summer and Fall
Flower Color: Blue and Purple
Foliage color: Green
Features: Host Plant for Butterflies or Moths, Attracts Birds, Attracts Butterflies, Attracts Pollinators, Attracts Wildlife, Keystone Plant, and Fall Color
Tolerances: Drought Tolerant, Black Walnut Tolerant, Salt Tolerant, Deer Tolerant, and Rabbit Tolerant
Garden Type: Pollinator Garden, Meadow, Woodland Garden, Rock Garden, and Small Space

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