Prepare the lawn bed by removing existing weeds and grasses such as dandelions and clover. Use herbicides that do not have a residual effect and will not conflict with the planting of seed.
Use the rototiller to incorporate peat into the top 4 to 6 inches of soil for the growing bed. Add 12 to 18 cubic feet of peat moss for each 1,000 feet of sandy or clay soil. This translates to about 2 to 3 inches of a peat moss layer. Incorporate any needed fertilizer as you complete this task. Prepare the soil in this manner a few weeks prior to planting seeds, to allow soil elements to settle.
Rake the bed to create an even surface. Do not pack the soil too firmly before seeding.
Distribute the seeds using a rotary spreader or gravity-flow spreader. The amount of needed seeds depends on the type of grass and ranges from 1 to 8 pounds per 1,000 square feet.
Place the seeds at a 1/8 inch depth by raking them in. In the summertime, you may benefit from spreading a mulch over the seeds to keep them moist.