Check the soil temperature. Bermuda grass requires soil temperatures of 65 to 70 degrees. Tall fescue requires soil temperatures of 50 to 65 degrees, with daytime temperatures between 60 and 75 degrees.
Measure the part of your lawn to be seeded. Make notes about conditions by asking a series of questions: Is the lawn sunny or shady; does the lawn drain well? Will drainage need to be installed? Will an irrigation system be installed? Does the soil need amendments? Will trees, shrubs, or flower beds be planted? Will sidewalks be added?
Figure the square footage of the lawn to buy the correct quantity of seeds. Buy and plant extra seeds for a thick ground-cover.
Take a soil sample from five or six different areas of your lawn to your local county agent. The test will show what type fertilizer to buy and whether your lawn needs added elements.
Kill existing weeds and grass if you are starting from scratch. Till the lawn and prepare the proper slope to allow water to run off gently. According to the Grassing website, the ideal lawn has a slope of 1 to 2 foot drop per 100 feet. This is a 1 to 2 degree slope.
Add organic amendments and/or top soil based on the results of your soil tests. Spread fertilizer and till the soil again. This would be the time to install irrigation or sidewalks, if desired.
Rake or drag the lawn area until it is smooth and level with the top 2 inches of soil being very fine. Use a commercial turf grass planter or hand-held broadcast seeder to sow half of the seed purchased. Sow the seed in one direction.
Plant the second half of your seed by walking in a direction 90 degrees to the first planting, according to the Grassing website. Rake or drag the seeded area to cover the seed about one-quarter inch with fine soil. Drag a piece of chain-link fence behind a lawnmower to accomplish this.
Water your lawn. Apply fertilizer at intervals throughout the growing season. Limit walking on the new lawn as much as possible.
Mow your lawn 60 to 90 days after the seeds germinate to keep aggressive weeds from choking out the seedlings.