Six biopolimer compositions containing chitosan and Biochikol 020 PC as the standard product, applied at concentrations of 1 and 2%, were used as 30 min seed dressing treatment of Viola wittrockiana, Brassica oleracea and Impatiens walleriana. All compositions stimulated the germination of seeds, and development of seedlings as well as increased seedling healthiness. The effectiveness of the tested compositions was related to their concentrations and plant species.