So we have about 10 acres in Whitetail institute Winter greens and Biologic Maximum and the weeds are really bad and I am wondering what weed killer to use that won't kill the stuff i planted.
You can use whitetail institute "Max Arrest" to kill grasses in your winter greens plot. I don't know anything about the biologic product.
That biologic product looks like a broadleaf product so I think you would be ok with the Max Arrest to control grasses in that plot as well. I hate weeds..