This work presented the data on five tomato genotypes and described a procedure that included presowing of seed treatment, sowing and extraradicular treatment of seedling transplants with an aqueous solution of the steroid glycoside Rustycoside, at concentrations of 0.001%, 0.005%.and 0.01% at the 3-4 leaf stage followed by treatment of inflorescences of the first, second, and third raceme with the same concentrations. The product of plant origin demonstrated a stimulating action on seed germination rate and root length. The employment of the steroid glycoside under study allowed an increase of the flower and fruit number on the first three clusters and, hence, the fruit productivity and quality.