Why Overseed? Warm-season grasses have a major drawback for homeowners—their color disappears when winter arrives! To have green grass in winter, some southerners overseed their lawns using cool-season grasses, such as fine fescue, bluegrass, or ryegrass.   How Does It Work? These annual cool-season grasses find a hospitable habitat among the dormant southern grasses and then die off with the return of warm weather in the spring.   What Are…