Dang I been doing it wrong for 30+ years and been told wrong Spring time I always used a 20-0-5 a high N fall time used a 6-24-24 low N Smallaxe tell me why you put Nitrogen down in fall and not in the spring time. I want to hear this. I been doing this one lawn that is total shade for 5 years ph calls for N and Soil test calls for N So you saying that's wrong. I'm killing it has you say. If I don't put (N) down it wont grow and will not live with out N. 5 years ago this lawn was so bare. There was more dirt vs grass. So I redone the lawn sowed KBG and CRF To keep it living I have to feed it spring and summer not as much in the fall. If not its going look like is did bare . The lawn is only 10 yrs old The first 2 yrs was a nice lawn after that went down hill to where I came in and fix it. I hope my customers don't read your statement. I'll be out of a job.Think a lot other guys would be to.