|Thatch is a layer of un-decomposed plant material consisting of roots, stems and grass clippings that accumulate at the base of the grass blade. As the layer of thatch becomes more dense it prevents fertilizers, water, and air from reaching the root zone.
The best time of the year to dethatch a zoysia lawn is in spring or summer. Where as Bluegrass and Fescue lawns should be dethatched in the fall when, if necessary. We recommend yearly aerations to help prevent the need of dethatching.