I wrestled with this weed control thing a number of years ago. I asked about and got this advice from a farmer in S.D. Plant your grass mix with forbes about the second week of November when the ground temperature doesn't allow for germination. It is best to plant into soybean, corn or Milo stubble not into wheat stubble. In the spring just let it grow don't spray or mow it your wasting your money. The first two to three years what you planted is developing the root system and you'll be disappointed. Though with the weed growth, especially the kocha the birds will have insects to eat in the summer, there will be great cover for the winter and a place to hunt. Also, the birds will feed on the plants in the winter. I listened to others, read the mow/spray philosophy then decided to save my money and do as he said. When I bought the property I saw very few birds. I did as he said and the next year we had way more fun than what we should of had. The place looks clean now there are birds, a bunch of birds but I think maybe there was more those first few years I had those darn weeds that I didn't mow or spray. I still thank that farmer from S.D. that gave me that advice.