Southern Lawn (Knoxville, TN) Been in house for 4 years, lawn has taken a real turn for the worse starting last year. I would like to put some work into this fall and next spring. The plan: 1) Within the week, spray a Weed B Gone type product over entire lawn now and begin cutting shorter (now cut at 3"). 2) Early to Mid September - dethatch. 3) Mid September - Aerate 4) Followed by overseeding (plan is a fescue blend suitable to primarily direct sun, suggestions) and appropriate watering. 5) Spring - Get down preemergent early enough. Another aeration? Thoughts. Thanks in advance.