I had I always thought that in the fall that you should you use a lower Nitrogen level and higher Phosphorus and Potassium. With grass preparing to go dormant i dont see why you would want to increase N since that helps promote growth. I like to feed the roots with P and help vigor with K to help survive winter better. The guy at Lesco told me that all the golf courses order 32-8-4 now. The idea is that the plant builds up N then uses it up in spring to encourage greener lawns. Would most of you guys agree with Lesco? What NPK are you guys using and why?