You still have plenty of time and there are loads of different crops you can put in there. Most of the seed companies make fall blends but sometimes they are a little pricy. A cheaper solution is to read one of these blends label for ingredients and ask your local feed & seed dealer for similiar seeds and mix it yourself. A simple solution is a wheat/rye grass which will do quite well during fall and winter and you can even mix in like snow peas or austrian pea blend which deer love and they alsodo great through the winter. Some of your seeds (rye, timothy, wheat) are very small and to get the best coverage you can mix the seeds with 50-100lbs of sand. This will help prevent throwing all your seed out too quickly and not getting as much coverage as you would like. If it is your first planting I would overseed the area, just throw an extra few pounds of seed into the mix. Local feed & seed stores are an excellent way to find out what worksgood in your region (aska farmer).