Planted dusty millers last year. They did very well. The snow bent them over. Can I trim them and, if so, how much? They are about a foot tall.
Certified GKH Gardening Expert
These plants are normally treated as annuals, but if yours is still hanging around it won't hurt to trim them back (by a third or down to where the new growth begins). Just make sure that you are not expecting any more wintery weather, as this could likely damage new growth. Here is more information on growing dusty miller plants: https://www.gardeningknowhow.com/ornamental/foliage/dusty-miller/growing-dusty-miller.htm