I put down the Weed'n'Feed a couple a weeks ago and the dandelions are very much in remission. Now I'm going around and grabbing the broadleaf cluster and pulling out the root with the help of a weeding tool. It seems like more often than not when I put the tool down next to the root it hits a rock just below the surface. Just thought I'd let you know. Further bulletins as events warrant.
JP
************************** Derocking.