Overseeding is the practice of adding new grass seed into your lawn. It is a very important step that helps keep your lawn thicker by filling in the thin areas and it discourages weeds from infesting the lawn. Overseeding is also done to replace older grass by introducing new endophyte enhanced cultivars of grass that require less water, less fertilizer, and resist insect and disease pressures, thus reducing the need to apply pesticides.
Overseeding is most effective when it is done in the Spring or in the Fall. Typically, the weather is not too hot, precipitation is prevalent and the conditions are ideal for establishing turf.