I am ready to apply round #2. I have had great success with my program and thought I would share it with you. Since I use a heavy rate of a balanced granular fert in round #1 (higher P & K for lawns that need it) they are very thick and growing well. My second application consists of a mixture of weed control and an iron chelate formula from Rootsinc. It sustains good color for the next 4 weeks. I simply cannot see the need for nitrogen in lawns free from disease. I get great results and I am not promoting more top growth in lawns that are growing 1/2" a day.