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.

When the first warm breeze rolls through, and your lawn begins to green up, it is tempting to tackle every yard task at once. Early spring feels like a fresh start, and dethatching often lands high on ...