Q.what to do with silver mounds in the fall
What care to do with silver mounds in the fall (upstate NY)?
Downtoearthdigs
Answered on September 16, 2015
You normally trim back the plant around the middle of summer to get rid of spent blooms and improve its appearance. This plant doesn't require any special care over winter as it will die back and regrow in spring. If it looks ragged, however, you can trim it back some in fall.
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