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Aster

Abundant, large, long lasting, clear lavender-blue semidouble daisy-like flowers with yellow centers, June–September. Asters prefer moist, rich soil. Divide every 2–3 years in spring or fall. To avoid powdery mildew, maintain good air circulation by proper spacing and, if necessary, staking. Water from below. A fungicide may be used in early July. Spacing: 12-24".