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Both aerating and scarifying your lawn can offer serious benefits. Aerating pokes holes in the soil to better allow air, moisture, and nutrients to permeate while scarifying removes the buildup of dead plant matter at the soil’s surface. Most lawns require both of these maintenance items to thrive.

When you don’t aerate your lawn, the soil will become more compact over time. This limits how much water can soak in to reach the roots of your grass, and it keeps oxygen and carbon dioxide from the plant roots. This can limit grass growth, which may sound great for limiting mowing, but it also leads to a lawn full of grass that looks dull and sparse. Eventually, compacted soil can weaken grass, while also making it more vulnerable to pests, diseases, and erosion and even causing it to die off.

Yes, you can throw seed on a lawn and hope it grows, but taking a few steps beforehand, such as dethatching, aerating, or raking, will give the seed a better chance of germinating. While it sounds like it’ll save time, throwing seed on the lawn without doing anything will require much more seed than any other method.

Aerate during the growing season, typically in spring or fall, when grass can quickly recover.