How to tell if your lawn needs it, according to experts.

The first step is to mow the lawn so that the grass is about half its usual length. This will help prevent damage to the grass during the dethatching process and make it easier to remove the thatch.

Add Yahoo as a preferred source to see more of our stories on Google. Thatch is a layer of organic matter that builds up on your lawn over time and can prevent your yard from getting enough nutrients.