Thatch is a tightly-woven mixture of living and dead grass, leaves and roots, which lives below the grass you see on your lawn. Every lawn has a thatch layer that is essential to a green, healthy lawn; when the thatch layer becomes too thick, however, it has an adverse effect on your lawn's health. It can prevent nutrients from reaching turf roots, and can also block much of the water from being absorbed into the soil to help the grass form a deep root system. Dethatching your lawn will help reduce the thatch layer to keep the lawn thriving all season.
