The aim of this study was to determine the effect of superabsorbent and mineral fertilizers on coloring of lawns. The study was conducted in the years 2002-2004 and included two lawn experiments which were established in the split-block split-plot design with four replications. The experimental unit was a plot with an area of 1 m2. One experiment involved monoculture lawn turf (pure sowing). The other experiment involved lawn mixtures. Four cultivars of red fescue were cultivated in pure sowing: Adio, Libano, Corail, Simone. The tested mixtures differed in the percentage share of red fescue (20, 40, 60 and 80%). Both monoculture and mixture experiments were conducted on two types of substrates: 1) with the addition of superabsorbent (S), 2) without the addition of superabsorbent (BS). Nutrients necessary for the proper growth and development of grasses and ensuring an attractive lawn appearance were delivered in the form of two mineral fertilizers called Trawovit Komplet and Sierrablen. On the basis of research results, considerable differences were found between the colors of tested red fescue cultivars on a substrate with superabsorbent. The lawn colors among the tested cultivars of red fescue, irrespective on the kind of substrate, changed in the years of the study and on average of the three years of research, cultivar Libano had the most favorable grass green color (7.2^o). Along with an increase in the percentage of red fescue seeds in the mixture, their green color was worsened. Of the tested fertilizers, Sierrablen had a more favorable impact on color improving of monoculture turf, whereas Trawovit Komplet on the mixtures turf. This indicates the varied response of individual species of grasses occurring in the tested mixtures to the applied mineral fertilizers.

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