Preparing a Good Seedbed In small bare spots, loosen the top 4 to 6 inches of the soil with a rake, hoe, or shovel. Fill in low areas and smooth the surface so clods are smaller than marbles. Core in several directions, allow plugs to dry, and then pulverize with mower, dethatcher, or chain link fence. Because tines have a difficult time penetrating dry, compacted soils, coring is best achieved when the soil is damp. Seeding Bare spots larger than 4 inches in diameter should be planted.
Smaller areas tend to fill in naturally, provided the lawn grass is capable of spreading.
Tall fescue and perennial ryegrass exhibit a bunch-type growth habit and are incapable of spreading. Choose a blend or mixture that is compatible with the environment and the existing lawn. To ensure uniform coverage, use a rotary or drop-type spreader, applying half the seed in one direction and the other half at right angles to the first pass. Seed should be drilled in a diamond-shaped pattern. Dry, compacted soils, obstructions such as rocks and trees, and excessive slopes may limit the usefulness of a slit seeder.