Dusty Millers - Knowledgebase Question

Hackettstown, NJ
Question by vielka
August 25, 2007
I have planted some dusty millers last year and now they have gotten very large and bunchy. When is the right time to trim them so they don't get out of hand and become over welming?


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Answer from NGA
August 25, 2007

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Most of the plants commonly called Dusty Miller would not be winter hardy in your area, so I suspect you must have some kind of perennial Artemisia. Depending on the cultivar, these can range in mature size from under a foot tall to several feet high. You might be able to selectively cut back some of the longer branches, cutting low inside the plant to conceal the cut ends. You could try this now, although it would be better to prune in early spring and then in early summer. Some of the artemisias are semi-woody and grow like shrubs but some spread out underground and can become invasive, so keep an eye on your plant.

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