jmt1271,
Last fall, our second in this house, I took drastic measures. I have learned the hard (and expensive) way that the start to having a good stand of grass begins in the fall – period – at least around here.
To really “scratch” up the ground and get it ready for overseeding, in the fall I cut the grass at normal height while bagging with the riding mower. I then put 4 solid cap blocks on my Craftsman dethatcher and went over the entire yard. I then mowed/bagged real close to get all the old clippings and thatch up. It was the end of the season and as I had done at other houses, I lowered the mowing deck as far as it would reasonably go without being totally on the ground and "scalped" the entire yard. Didn't care about the blades as I was going to replace them anyway after a season/summer of use. This chewed and loosened up the top of the soil really good and got the grass really short so there was lots of ground exposed. I then spread about 150 lbs of fescue.
So far I am pleased with the results. I will never scalp the entire yard again – was very scary looking out at the yard last fall and seeing nothing but clay dirt /forums/images/graemlins/crazy.gif /forums/images/graemlins/blush.gif /forums/images/graemlins/confused.gif - unless I lose the grass from a long drought, but will just scalp rough spots along with overseeding the entire area
I am religous about using Scott's year round treatment. It's expensive, but, I feel well worth it. In mid-October I put down winterizer, and again in January. Put down the weed and feed in April.