Is there a good rule of thumb as to when to stop aerating? Im in Wisconsin. Lately i've been told that you can do it up untill the snow flies, other people have told me that you should stop in the middle of October. I'm a little confused but can't find anything that gets more specific than "Fall is a good time to aerate" Well......is late fall considered "fall"? We just got some rain after about a month of not getting any, and i've had a couple calls for aerating. I'll probably do them, but just out of curiosity I was wondering when to stop?