Answer: Your plants sound just a bit overgrown. Artemisia, or dusty miller, should be trimmed back each spring to renew the plants. Or, you can dig and divide the plants in the autumn. In fact, to get your plants back into shape you may want to divide them at the end of this growing season and then give them a trim when new growth begins in the spring. Then annual pinching or trimming should keep them looking attractive for another 2-3 years before it's time to dig and divide.
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