Is there a better time, spring vs. fall, to aerate and overseed your lawn?
Late summer through about Oct. 15th is the prime time to aerate and over-seed. With as dry as it's been til now, it was not an easy task. If you can get some seed down this week, you are probably o.k., but it always depends on when we get our first heavy frost.
The second window of opportunity is in the spring, but it's not as preferable, given the weed competition at that time.
More info here: http://extension.umd.edu/sites/default/files/_images/programs/hgic/Publications/HG102%20Lawn%20Estab...