Core aeration is the mechanical removal of soil cores from the lawn. This practice is essential for reducing soil compaction. If your lawn has not been aerated regularly, chances are that the soil has some degree of compaction.
Compacted soil impedes root growth, water percolation, and air flow. The goal of core aeration is to help maintain and increase an aerobic environment in the soil which recycles air, water, and nutrients to the soil and grass. Consequently, root systems are able to expand, helping to reduce weed growth, and microorganisms benefit from an improved living environment.
In combination with core aeration during the fall season, overseeding introduces new grass varieties to your lawn which results in a thicker turf and more genetic diversity. This improved biological and physical structure aids in the lawn’s ability to fight weeds, insects, disease, and drought. Overseeding in conjunction with core aeration allows the seed to further penetrate the soil and provides it with protected spaces throughout the lawn to germinate.