I am about to start my Late summer applications starting this week. I will be using a 30-3-9 50% slow, 2% Iron. When is the best time to start aeration's and over seeding? I know I have never started until after labor day and have always been done before October 15th. I have always done all my applications 6-8 weeks apart. I know it is beneficial to aerate then fertilize and if I am overseeding I would use a higher phosphorus fertilizer. So my question is how do you time the late summer application with the fall/winterizer application and incorporate aeration and overseeding? Also correct me if I'm wrong but I think that a 3-1-2 ratio is best for a fall/winterizer application for an existing lawn.