Answer: It's possible that your plants were over-stressed in fighting the attacks of powdery mildew and aphids. Now that you've got those problems under control, they will probably take this year to regain their strength so they can bloom well for you next season. If they refuse to bloom next year, they may be overcrowded. Too much competition for moisture and nutrients can stop flower production. If you decide to dig and divide your plants (pot up extras for gardening friends), remember that Japanese anemones prefer rich, moist, well-drained soil, where they'll have afternoon shade. Anemones also benefit from a winter mulch and regular deep watering in dry weather. Best wishes with your garden!
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