I know this is about gardens, but seems to be the closest usenet group
where I may find some expertise about lawns. Specifically:

(1) What is the best way to "dethatch" and "aerate" a small lawn
manually?

(2) When is the best time to apply organic weed-preventers like Corn
Gluten Meal? Before or after dethatching/aerating?

(3) Simialry, do I overseed a few weeks before or after applying Corn
Gluten Meal?

This is in Chicago. Thanks for any advice.