Grassland habitats located in a part of the Popielno Peninsula that is used for agricultural purposes (Popielno and Wierzba), under conditions of spatial isolation, were evaluated based on phytosociological relevés. A phytoindication method based on ecological indicator values, developed by ZARZYCKI et al. (2002), and simple statistical methods were employed in the study. The analyzed grasslands are managed as hay meadows and pastures. Vegetation is dominated by sown grasses, primarily Dactylis glomerata, Poa pratensis and Festuca rubra. The local plant communities belong to the classes Molinio-Arrhenetheretea and Phragmitetea. A total of 200 species of vascular plants were identified in the research area, including 197 species described by ZARZYCKI et al. (2002) with the use of indicator values. Grassland vegetation in Popielno and Wierzba prefers moderate light and temperature conditions. On a 5-point scale, the values of light and temperature reached 3.47 to 4.65 and 3.48 to 3.99, respectively. The soils in the area are fertile, nutrient-abundant (trophy of 3.32 to 4.20) and neutral (acidity of 3.56 to 4.79). Soil moisture content in the examined habitats ranged from 2.83 to 5.89 on a 6-point scale.