How far apart did you drill the holes and what type of drill did you use?
Thanks
I drilled about every 4 inches spaced and about two to six inches down in only the areas in which the grass was abnormal (sparse, yellowish, stunted growth, etc.). The soil was compacted/dense in each and every abnormal area. The drill bit was two feet long and there were two types of drills. One had the usual end used for wood, and the other had two rectangles at the tip. The diameter was about 5/8". I like doing the drilling because:
1. The professional aerator man seemed to cause a fungus infection
2. No lawn plugs everywhere
3. It gave an appreciation for how compact soil changes lawn health.
4. Cost less
Then Lime and Milorganiteョ was applied. In the few areas in which the lawn had died and was depressed/sunken, the area was cut out, soil removed, and was replaced with MiracleGroョ Lawn Soil mixed with Perlite. It'll take about a month for the rhizomes of the Bluegrass to fill in the bare spots. Cutting out the dead areas immediately made the lawn look better because there was no yellow areas.