I'm currently in the middle of renovating my parents lawn. So far I've mowed lawnvery short, thatched, dethatched, sprayed round-up along on weeds that were in the fence-line. Was planning on slit-seeding/fescue and using starter fertilizer. Should I use a crabgrass preventer first? Or will the new lawn hold up? Should I aerate prior to slit-seeding? My main concern is the crabgrass coming out of dormancy and choking the fescue seedlings. Any expert advice would be appreciated....as I'm anxious to get a plush lawn established. Thanks!