Overgrown Silver Mounds - Knowledgebase Question

Warren, MI
Question by CherAhug
August 10, 2000
I have silver mounds planted in an area of my landscaping. The first year they were planted, they stayed the perfect size (about 1 1/2 feet wide). This is the second year for them, and the problem I'm having is that they have grown twice as large as they were last year. Another problem, is that they have gotten so tall that they are seperating in the center which is causing them to lose their "mound" appearance. They are seedy and they are looking unkept. I'm not sure that I should be trimming them back, and can I or should I divide them at the end of the season in order to prevent them from getting too large? If so, when is the best time to do this?

Answer from NGA
August 10, 2000


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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