(This is Jim wife here) I seriously appreciate your response. We will try the roundup and preemergence as you you described for the patio. However, with all do respect hind sight is 20/20. we hired both landscapers that came with lists of referral whom we knew. we paid a fair price and did not take the lowest bidder. your comment about our "poor choices" is offensive. we wish everyday that we could turn back time but we did everything in our power to avoid what happened. Now we are trying to fix it with others advice. Fortunately it's mostly cosmetic now although the emotional scars of being scammed by 2 landscapers I believe will never heal and the constant reminder awaits us in our backyard.