I have a customer that has about 100x100 yard. The yard was rotor tilled last year and then had a sprinkler system put in but no grass. He wants to see a carpet of grass by August. Other than hydro and sod, what r my other options here and should i rotor till again and put topsoil down? How should i prep it for seed? I am on long island and the yard has alot of trees. Thanks for ur advice.