Asters are members of the large Asteraceae family of plants that includes chrysanthemums, daisies, sunflowers, and yarrow.
They are daisy-like flowers that generally bloom from summer into fall.
Perennial varieties are suited to USDA Hardiness Zones 3 to 8, while annuals grow in all temperate zones.
They may be large, like the three- to five-inch blooms of an annual peony China aster, or they may be small, like the half-inch blossoms of a perennial wood aster.
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Pollinators like bees, butterflies, moths, and other beneficial insects are attracted to the pollen, while foraging birds feast on the seeds. This is especially true of native species.
In our aster growing guide, we discuss how to grow and care for numerous species and cultivated varieties.
In this article, we introduce 11 of the best blue asters.
Here’s the lineup:
Except as noted, bloom times are from late summer into fall. With deadheading, plants may continue to flower until the first frost.
Please note:
Perennial asters, especially native species, are vigorous growers. They are known to spread aggressively via extensive root systems and self-sowing.
Be sure to read our 21 tips for managing perennial asters so you can maximize your enjoyment of these dynamic plants.
Also, plants grown in humid regions may be prone to fungal infections due to excessive moisture. However, while this may affect the leaves, it generally has little effect on the flowers.
According to the Chicago Botanic Garden’s A Comparative Study of Cultivated Asters, New England species and cultivars may suffer from powdery mildew, and New York types
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