The process of wall construction--the heavy equipment, foot traffic and deep digging involved--alters the chemistry of the soil and removes the good topsoil. Therefore, it is difficult to grow grass next to a new concrete wall. To successfully grow grass near a concrete wall, you have to replenish lost nutrients by amending the soil and waiting for up to three months before you proceed.
Wait at least 90 to 100 days after a new concrete wall is built so it cures properly and stops leeching lime into the soil. The lime spreads up to 3 feet away from the wall and affects the soil there. This lime is used in mortar so concrete blocks used for walls adhere better. Too much lime is harmful for soil, as it prevents old and new grass from receiving important nutrients and increases nitrogen levels that may possibly burn plants.
Measure the area just beside the wall where the grass was trampled upon so footing could be laid. This area, also called the dead zone, is bare and lacks any growth. Note this measurement down on paper, which is usually up to 3 feet from the wall. Also measure the length of the wall. Multiply both the figures to determine the square footage you have to treat.
Purchase peat moss based on the square footage from your local nursery garden supply center. You will need three bags for every 24 square foot area. Peat moss helps lower alkaline levels in the soil that the lime used in wall construction has raised.
Till the soil down to 6 inches. This helps break the soil into pieces and to loosen and aerate it.
Rake the soil to collect construction debris buried under the soil, such as small stones or wood framing pieces. Collect these in a tarp or plastic bag and dispose of them appropriately.
Spread a 4-inch layer of peat moss over the area and rake it to ensure it goes deep into the soil. Sprinkle grass seed over the site, making sure they are evenly distributed and rake again so they are lightly covered with soil.
Water the area gently until the soil is evenly moist, and continue watering twice a day until the grass sprouts.