Posted: 11/08/2015 at 16:16
Larry yes it is an artemisia. ,hopefully it is a variety called
Powys Castle which is well behaved.
Cut it back now but do so by perhaps a third. Use the pieces cut off as cuttings for plants next year.
Yes, a perennial but a harsh winter is likely to kill it
i don't allow mine to flower...flowers spoil that lovely silver foliage. I trim mine two or three times during the summer to keep it compact