I have a lawn that is pretty much established, but I am going to overseed this fall with Kentucky Bluegrass to thicken it up. I bought some Scotts Wintergaurd with Plus 2 Weed Control fertilizer to use at the same time, but it has occurred to me that this may kill the new seed... I have done this yet, but planning to shortly - does anyone know if it is ok to use this fertilizer?