Core aeration is the process of removing small plugs of soil from your lawn with a special aerating machine. In addition to reducing compaction, core aeration also allows water, oxygen, and nutrients to reach the root system of your lawn. This helps create a more dense turf with a higher stress tolerance for drought and disease. We recommend that all lawns are aerated at least once every year, preferably in the fall when the root system is growing vigorously. If your lawn has thin areas, you may consider aerating in both the spring and the fall for even better results.