I agree. You won't have to spray twice though. Just wait until about 2 weeks before you get ready to plant and hit everything with a couple qts of gly to the acre and it'll be toast when you get ready to spread seed. Something else to think about....If your standing "hay" is thin and you spray 6 weeks ahead of planting....you won't have any hay to cover your seed come planting time. It'll do like bacon cooking in a skillet and leave you with a lot less than you thought you had to begin with.