Prepare the soil by tilling to a depth of 4 - 6 inches. Conduct a soil test to be sure your soil has the proper nutrients it needs for a healthy lawn. Apply fertilizer and lime at the recommended rates. If you are unable to conduct a soil test, apply lime and a complete lawn fertilizer according to the recommended rates on the packages. Work lime and fertilizer evenly into the soil, then rake the soil surface smooth to give the seed an ideal bed in which to establish healthy roots. Sow the grass seed by evenly spreading according to the recommended seeding rates. Rake, harrow or otherwise work the seed into the soil 1/4 inch to 1/2 inch deep. Keep the area well-watered until the seeds germinate and the seedlings have grown sufficiently to establish a lawn, then water as needed.
Overseeding or Reseeding:
Before overseeding, it is important to prepare the soil. Conduct a soil test to be sure your lawn has the proper balance of nutrients. Fertilize and lime if needed. Mow or clip the existing grass as closely as possible. Remove clippings and rake, harrow lightly or aerate the soil where there is existing lawn. This will allow the new seed to make contact with the soil. Sow the seed and gently rake to cover. Keep the lawn moist until seedlings are established, then water as needed.