I have to renovate about 15,000 sf of lawn that was seeded by a contractor in early spring. The seed never really took due to lack of water and now the area is all crabgrass. What is the best way to get this area established with a rye/blue seed. There is anotheer area on the property that i will have hydro seeded by a friend and I was wondering if i could have him spray the crabgrass area after i got done with the round-up app. I originally was going to round-up the area first then aerate heavily and then overseed with a broadcast spreader. Is it necessary to remove the dead crabgrass first before oversedding or hydroseeding and if so what would be the easiest and best method for a solo operator. I do have a vacuum for my rider for ease in removal if necessary. Also any suggestions on how to spray the area with round-up?? Any help would be greatly appreciated at this time.