This paper presents the results of studies carried out in 2006-08 on the impact of sewage sludge on the utility values of grass sward. The study was conducted with different doses of sewage sludge (0, 70, 140, 210, and 280 Mg·ha^-1) applied in spring, summer, or autumn, and mixtures of lawn grass designed in the Department of Grassland at the University of Warmia and Mazury in Olsztyn, which were sown in spring, summer, or autumn. Winter survival, turfness, colour, perfection of leaf blades, and general appearance of grass sward on a nine-point scale were evaluated during vegetation seasons. It was demonstrated that incremental doses of sewage sludge positively impacted the examined characteristics, especially when fertilization was applied in spring. Spring sowing of lawn grass seeds was also found to be better. It was shown that both tested mixtures (fescue and bluegrass) are useful for sowing extensive lawns, although the fescue mixture had more favourable parameters.