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No. Both processes are important for a healthy yard and work toward a similar goal, although dethatching serves a slightly different purpose. Making sure the thatch doesn’t grow too thick prevents other lawn problems, such as attracting pests if the plant decay layer gets too big. Aeration puts less strain on your lawn than dethatching, but both are of equal importance.

It’s best to fix lawn depressions during late spring. You want to wait until after your last frost date and when the yard is not too wet. This also allows ample time for new grass growth once you reseed.

Choosing fertilizers: slow-release for steady nutrients, organic for eco-friendliness, or specific blends for soil deficiencies or grass types.

You can try that, but it isn't likely to yield results. It's like watering potted plants without putting the seeds in. Most of the tossed grass seeds sit on top of the soil or existing grass blades and never germinate. The seeds need to make it into the soil, just like growing a potted plant. The best way to accomplish this is to aerate your lawn first, then overseed.