Bare spots in your lawn can be unsightly. But before you rush to re-seed it, take some time to discover why your lawn has bare spots in the first place. It could be due to poor drainage, heavy traffic, over-fertilization, or any number of reasons. Planting grass in bare spots may be a quick fix, but the grass will likely die again unless you get to the root of the problem.
Make any thin or bare spots in your lawn more visible by raking the lawn thoroughly with a broom rake. Then follow with a double-duty rake to remove any thatch.
Use a hand cultivator to loosen the soil in the bare spots to a depth of 1 inch. If the bare spots are a result of heavy traffic, loosen the soil to a depth of 6 inches and then mix in a 2-inch layer of peat moss.
Sprinkle a starter fertilizer over the bare spot according to the manufacturer's instructions.
Rake the soil level.
Hand-broadcast the seed onto the bare spot. This is not an exact science, but aim for around six grass seeds per square inch.
Water the bare spot so that it is moist but not soaking. Keep the bare spot consistently moist until the grass seed sprouts.