How and when to prune Artemisia 'Powis Castle'
I like this plant, but it looks really bad right now: leggy, with lots of dead, grey foliage in the center. I've been away for a couple of months, so I'm not sure if it was over- or under-watered, or if it is just spent. I would like to rejuvenate it, but I can't find anything on when it's OK to do this in my climate zone: coastal SoCal (right in the Ventura fogbelt--a.k.a. fungusbelt). I'm also not sure how aggressively I can cut it back. Any thoughts? Thanks, Nick