Aeration is the mechanical removal of cores of soil from the turf.

Aeration provides pathways to the roots of the grass. This is helpful is allowing moisture, nutrients and oxygen to have better access and thus helps to improve the health of the grass. It also lessens the compaction of the soil giving grass roots an easier time penetrating the soil. In cases where there is a lot of thatch, blocking access to the roots it provided a means of punching through the thatch layer.

Aeration is best performed during high growth periods. For the cold season varieties of grass we have in Ontario, these high growth periods occur in Spring and Fall.