In my front yard I seeded a completely fresh seedbed and planted 100% Supranova Supina grass due to a lot of shade. In the backyard, I have two areas, one maybe 5x20, the other about 5x5 that I tilled up and seeded with Legacy Fescue Mix (chewings, red creep, hard) Both have come up very nicely. I understand from my research that the supina grass is extremely aggressive, while the red fescue will slowly expand. Could a few of the pros please provide some general guidelines for how much expansion can be expected by the bluegrass and the fescue? How big of a bare spot is big enough that is warrants overseeding? In both cases I do not think they require a general overseeding, if anything they need some patching. Let it grow and expand vs overseed...expertise is welcome. I would be happy to post some pictures if that would help. I wasn't sure if there is a genereal rule i.e. softball size spot too small, basketball, etc.?? I am in Chicago and have probably 5-6 weeks left before really hot weather.