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Raking only moves soil, leaves, and debris around on the surface. Aerating your lawn addresses compacted soil. Core aeration loosens up the soil, which makes it healthier and creates more verdant grass from the richer nutrients and stronger root systems that develop. Raking only provides short-term benefits, while aeration creates higher-quality soil and grass growth in the long term. Rake or dethatch before aerating for a bigger benefit to your lawn.

While dethatching first often makes the aeration process faster and easier, both actions can be done on the same day. Aeration can also loosen up the thatch, even if you have a harder time aerating the soil because the thatch got too thick. Because both dethatching and aeration have the common goal of making it easier for the soil to get water and nutrients, it’s safe and possible to do both at the same time.

Aeration is most effective when the soil is slightly moist but not excessively dry or waterlogged. If your lawn's soil is extremely dry, consider watering it a day or two before aeration to facilitate the process. Conversely, avoid aerating when the soil is saturated or excessively wet, as it can lead to poor aeration results and potential damage to your lawn. Finding the right moisture balance is crucial for successful lawn aeration.

There are a few time periods or conditions during which you should avoid aerating your lawn. For example, do not aerate when the ground is frozen or waterlogged, as it can damage the soil structure and grass roots. Aerating during the peak of summer heat or drought is also not recommended since it can stress your grass further. It's best to wait for cooler, more favorable conditions. Finally, newly seeded lawns should not be aerated until the grass is well-established, usually at least one year after seeding.