Go to a local fertilizer supplier to get a good fertilizing program set up for your needs. As far as aerating and seeding. Yes you can seed without aerating. I have done it with decent results but you have to make the seed stick to the ground, so some type of soil preperation is necessary. Using a dethatcher would be the best way to prepare the soil. Then go over it with a roller. IF you get some rain or have your customer water regularly you should have very good results. Most customers and many landscapers are under the false impression that aerating is needed when seeding. Aeration more than anything decompacts the soil to allow the existing grass's roots to absorb water, nutrients and air more readily.
Throw seed out over the lawn- 15% germination<br>New lawn, tilled & levelled - 85-90% germ<br>Slit seeding after aeration - 65-75%<br>Basic slit seeding - - 60-65%<br>Seeding after powerraking - 20-25% germ<p>Success with grass seeding is basically seed to soil contact. Seed should ideally be planted 1/32" to 1/16" deep. Powerrake or dethatch doesn't lift up much soil to accept the seed. Aeration alone, then seeding, is better than powerrake and seeding from my experience.<p>----------<br>Jim<br>North central Indiana
In my area of the northeast all that would do is, well, we call it "feeding the birds". Five minutes after you leave the lawn will be wall-to-wall starlings eating expensive bird food.<p>Bill