Janet,

I view most artemisias as hardy as johnson grass.

I have limelight, and give it a hair cut every so often, and it just comes back fuller and even prettier. The dogs nested in it too after it was first planted, and they just made it spread into a much bigger patch.

I say go for it.

As rampant as gooseneck is, I doubt if anything would hurt it either.

Sue

I have read on other posts that you can preemptively strike artemisia with the shears, too. Supposedly if you cut it back a few times as it's shooting up, it will top out at a smaller size but be less prone to flopping. I'm going to try that next year because I don't really like the "stubs" that are left when you hack at it after it's gotten to 3-4ft tall.