At the risk of killing the plant, I think I'll go ahead and trim off all solid leaves and see what happens. The worst case is I replace it, which is where I am at anyway. Just need to decide if I'll go with the same (really pretty) plant or perhaps try something else. Funny, I ran across this pic from 2007 and the only thing still there is the masterwort (now green) and the euphorbia. The rest have all gone away for one reason or the other, and there is now a chunk of crocosmia behind the euphorbia and a salvia where the candytuft was. I always struggle with creeping phlox, and that spot is in a bit of flux at the moment. Good example of our ever-evolving gardens!