I have tried overseeding with a tall fescue for the last few years and I'm not sure it's doing any good. I mow low, use a broadcast spreader and water 15 minutes four times a day for about two weeks, but at the end of the two weeks I can still see ungerminated seeds sitting on the ground with very little to absolutely no new growth. I've detatched and core aerated as well, but still nothing.
I've considered mixing the seed in a wheel barrow with a few bags of garden soil and manually raking it into the yard, but that seems like an awful amount of back breaking labor for a 1/2 acre yard and really defeats the purpose of the broadcast spreader -- which seems a lot easier. Is there a proper way to use a broadcast spreader, or is it one of those things that garden stores sell to catch the rubes?