Q.cutting back dusty miller
Have dusty miller plants that are starting to regrow this year. I never trimmed last year’s growth and the new growth is coming out of the base of the plant. The long dead leaves from last year remains. Should I cut it back now?

Yes, you may prune the dead growth from your dusty miller so long as you are careful not to disturb the new growth.
For more information on growing dusty miller, please visit the following link:
https://www.gardeningknowhow.com/ornamental/foliage/dusty-miller/growing-dusty-miller.htm