5/13/2014 3:05 PM
I agree with Clay on aerifying before seeding. As far as holes, in the past I have gone with a 3/8 tine on very clode spacing. The more holes the better.
My process when I did it in the past, verticut x2, aerify (I pulled cores because I could), seed, topdress, brush everything in (making sure to keep it all on green), fertilize, water. I went in a day or 2 later with hand spikers and spiked even more seed into the green (I was seeding areas in greens with 30% loss)
I had awesome germination in all the aerification holes (great seed to soil contact and protected from play and mowers). Good luck!!