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Experts recommend aerating a lawn at least once a year. If you haven’t aerated your lawn recently, or if it has a significant amount of thatch buildup, you may need to aerate it twice annually for a few years. Keeping up with a regular aeration schedule helps ensure the long-term health of your yard.

Yes, you can overseed your lawn without aerating it, but results may vary. If you have the time, dethatching or aerating your lawn before overseeding will yield the best results. Overseeding your lawn without aerating will work, but less seed will take root. For the best possible results, aerate your lawn before overseeding it.

To prepare your lawn for core aeration, water it the day before you aerate. (Alternatively, you can wait until it rains and aerate the following day.) Aerating after watering or a rainy day will make the process easier since you can penetrate moist soil better than dry soil. You should also flag your sprinklers so that you don’t accidentally hit them while aerating. If you have a lot of thatch buildup in your yard, you might need to dethatch your lawn before aerating as well.

Yes, it’s worth aerating a lawn. Even the most diligent mowing, watering, and fertilizing schedule is not enough if the roots are not able to benefit from the care and nutrients you’re giving them. Even a lawn that’s already healthy can benefit from aeration because the more air that circulates around the roots, the stronger and healthier it will grow.