A core aeration is removal of cores of soil from existing lawns. The cores are about 5/8 inch in diameter and 2-4 inches long. We recommend these cores are left on the lawn, as nutrients will be recycled back into the lawn itself. 
The process of an aeration allows air, water, and nutrients to get into the roots of the grass plant. By loosening the soil, root growth is encouraged. Soil fungi & bacteria are released when soil is disintegrated, which helps degrade thatch. We also recommend overseeding (if there is a need for it) along with aerating the lawn.
Severe cases of thatch build up will not be solved by aerating the lawn. However, we do recommend aerations be done annually for overall health and vigor of the lawn.
We offer aerations in the Spring and Fall. Customers with sprinkler systems are given markers to identify the sprinkler heads prior to aeration.