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Yes, aerating your lawn will help grass grow. Pulling out soil plugs or applying liquid aeration solution allows more air to circulate around the roots. A well-aerated and hydrated root system is the foundation your lawn needs to grow green and lush. Even if your lawn is healthy, annual aeration will keep it beautiful each season.

While your lawn will reap the benefits of core aeration faster than liquid aeration, the liquid solution will last longer and have more cumulative effects. If your lawn is in really bad shape, try both. By creating holes in the soil with the core aerator, you’ll make it easier for your lawn to absorb the liquid aerator solution. You might have to apply the liquid aerator several times during the growing season, but again, the positive results will be more cumulative than with core aeration on its own.

Whether or not grass will fill in bare spots itself depends on the type of grass you have. For example, grass with rhizomes (e.g., Bermuda grass) and stolons (e.g., Saint Augustine grass) will naturally fill in bald spots as it spreads laterally. However, clump-forming grasses will not spread. 

The first step in re-doing a bad lawn is correctly diagnosing the problem. That’s why we recommend calling a licensed and trustworthy lawn care company that can help turn your damaged lawn around. Once the problem is diagnosed and fixed, you’ll want to keep up with lawn maintenance by watering, mowing, and feeding your lawn the proper nutrients.