Abstract
The experiment was established in the laboratory of Grassland Department and Landscape Architecture Development at the University of Natural Sciences and Humanities in Siedlce in 2012. The study was carried out in Petri dishes in triplicate. In the study five species of grasses were used: Festulolium brauni, Dactylis glomerata, Poa pratensis, Lolium perenne, Lolium multiflorum and two legume species: Trifolium pratense and Medicago sativa. Nano-Gro stimulator was used as a study factor. The obtained results showed a significant effect of the used stimulator on the germination energy, and a varied effect of the growth of grasses.