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Douglas aster plants (Symphyotrichum subspicatum) are native perennials growing in the Pacific Northwest. They bloom all season long, producing attractive, papery flowers without much plant care required. They are ray flowers (like daisies) with bright purple-blue papery petals and a yellow central disk. According to Douglas aster information, the flowers put on a show from July through September. The plant is very hardy, with creeping rhizomes that help it spread.
Description from gardeningknowhow.com
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