I have about 1.5 acres of turf that i am converting from bahia to bermuda. It gets overseeded with Perennial Rye Nov 1 , and receives no pesticides from Nov -April because of grazing horses. The bahia is thinning and crabgrass is getting to be a problem. I have quite abit of common bermuda already, but want to get a solid stand by November. Any tips to get this done without having a mess of grassy weeds?