For all of you organic guys. Going to install a new seeded lawn. Bring in good top soil ammended with all the right organic stuff. Seed the grass. Seed germinates no problem. What are you going to do with all the weeds that germinated from the topsoil you brought in? I usually just give an inorganic spray at the 3 month mark to kill the weeds and then the grass just fills in no problem. All of the organics seem to be preemergent so that would kill the grass. Also lets not make it that you apply organics to kill the emerging weeds and then seed 3 weeks later because the season is just to short for that sort of nonsense.