Aeration involves perforating the soil with small holes to allow air, water and nutrients to penetrate the grass roots. This helps the roots grow deeply and produce a stronger, more vigorous lawn. The main reason for aerating is to alleviate soil compaction.

Aerating is easiest on you (or your equipment operator) and your lawn when your soil is moist from irrigation or rainfall the day before. Overly dry soil can be tough to aerate, so moisture eases the process. Never aerate overly wet lawns; wait a few days instead. Slicing aerators slice through lawns and leave soil in place.