I'm so ready to get started. This is my first year spraying on my own. Ready to start mowing also and get some more money in the bank acct. But I do have a question. Does it really matter if you aerate in the spring or fall? Or does the kind of grass you have determine that. For example for a cool season grass do you aerate in the fall and a warm season in the spring? Also do you "scalp" your yards in the spring? I personally do not. I think that it puts to much stress on the grass and promotes weed growth.