EN
A field experiment was conducted in spring of 2007 in the Agricultural Experiment Station in Bałdy, owned by the University of Warmia and Mazury (NE Poland). The experiment had a completely randomized design with four replications. Plot size was 20 m2. Forty seedlings of prairie cordgrass (Spartina pectinata Link.) were grown per plot, at the density of 2 plant per m2 respectively. The experiment was established on mineral soil (sandy silt) of quality class IVa. The aim of the study was to determine the effect of climatic conditions in the Olsztyn Lakeland on the growth and development of introduced species of C4 grasses.