Technical Abstract: Kentucky bluegrass is a widely-used, high-quality, sod-producing turfgrass. To maintain an acceptable level of quality and function requires irrigation in the semi-arid regions of the western U.S. Landscape water use, however, is coming under increased scrutiny, and reducing water inputs is a goal of many municipalities. To identify Kentucky bluegrass that maintains green color under low irrigation over summer seasons, this study evaluated the percent of green cover of Kentucky bluegrass cultivars and accessions and other bluegrass species. Cultivars generally had higher green cover in spring and fall, while several accessions and old U.S. cultivars showed higher green cover during summer months. Other bluegrass species did not have percent green cover values above any cultivars, and as a group consistently performed the lowest.