Thanks, Zig. We do get about 52 inches of rain a year here but summers are hot and often very little rain during those hottest months. I may end up moving the Cups to another location. I wouldn't mind if they took over the entire area.
I'm afraid I've had that same experience with the weed cloth. The roots do tend to penetrate it and fairly quickly. I've got some that was down for less than two years and quite a bit came through. It has worked the best here for me just sort of bunched up and tucked around the borders and barriers with mulch elsewhere. Well, gardening keeps us on our toes. It's "us" against "them".
