Is It Better to Dethatch or Aerate Before Overseeding?

Both aerating and dethatching are recommended before overseeding because they improve grass-to-soil contact for proper germination. In most cases, you'll only need to dethatch to remove the debris that is covering the soil and preventing grass seed from germinating properly.

Should you dethatch before reseeding?

To get high germination rates when overseeding, not only is it important to water the seeds, but also make sure the seeds and soil have good contact. Two of the recommended processes to achieve this are dethatching and aerating.

What's more important dethatching or aerating?

While dethatching removes the layer of thatch above the soil surface, aeration removes actual plugs of soil from your yard. With looser, more nutrient-rich soil, root systems can spread out and grow deeper into the soil. Holes in your yard may not be glamorous, but they'll quickly fill in with dense, healthy grass.