Core aeration is a vital service to have a healthy lawn. Fescue lawns should be aerated in the fall and early spring, where Bermuda lawns need aerated in the late spring. We have clay soil which is the worst soil type to have. Core aeration loosens soil compaction and allows water, air, and beneficial nutrients to get to the roots. Core aeration is instrumental in root development in new seedlings as well as mature grass. Never skip the opportunity to aerate your lawn.