Guys, I sprayed my yard in the spring to get rid of most of the weeds and leave the bermuda. But I have several patches about 5'x5' where there is no bermuda. It's not brown and it's not the color I'm worried about. It's just very thin in there and full of volunteer weeds. Is there a particular fertilizer or mowing height that will encourage the grass to spread? I have a one acre lot and have already had two applications of pelletized lime ( 120 lbs each time ) and recently put on 100 lbs of triple 13 (this is over a time frame of February to last weekend).