Two wetland species namely Cyperus laevigatus L. and Cyperus articulatus L. were grown under different water levels and nutrient concentrations. For C. laevigatus, the highest value of plant height, biomass and survival were recorded when water level was at soil surface, while in C. articulatus grown under high nutrient treatment the total biomass was increased by the decrease of water level. Results showed a highly significant effect of water level on C. laevigatus density and biomass. Nutrient addition affected biomass and plant density, but interaction between Nutrient addition and water level affects plant height significantly. In case of C. articulatus Nutrient addition and water level showed significant variation on biomass and plant height. The highest Na+, K+, total-P and total-N contents in the above-grounds parts of both species were detected in plant grown under high nutrient medium and water level below soil surface. The obtained results will be useful for the optimal management of sedge plants in relation to water and soil of the Nile Delta wetlands.