I'm tired of looking at the weeds and clover. I've been reading up here and have some questions about renovating my lawn. We have 1 acre that is mostly weeds and clover. I did a soil test (with the local county extension office) The soil test recommends 1.5# of nitrogen per 1000 ft2. They recommend I use a balanced 1:1:1 ratio fertilizer this year and just nitrogen the next two years, then do another soil test in 3 years. According to the test I do not need any lime. Since I'm going to roundup the entire yard this month, when do I need to put down this much fertilizer, before I do the roundup, or at seeding time? Is this enough nitrogen to harm new seedlings? Assuming that the first of September is the best time to plant new seed, I will need to roundup this week, right? I plan on rent an aerator when I seed to get some of the seeds into the ground, is this a good idea?