The purpose of the researches was studying stimulating effect of water solution of a growth factor of "Ribav-Extra" on the seeds of Pinus Sylvestris L. and the identification of the doses stimulating germination energy, laboratory viability of seeds and the increase of sprouts in length and weight. The soaking of seeds of Pinus Sylvestris L. was made in various concentrations in water solutions of growth factor "Ribav-Extra"; seeds growing was carried out in vitro. The analysis of influence of the stimulator "Ribav-Extra" on the energy of germination and laboratory viability of seeds and dynamics of increase of sprouts in length and weight was carried out. The identification of stimulating effect of "Ribav-Extra" on sowing qualities of seeds was carried out in vitro according to the requirements of the existing state standard specifications for the developed technique. In the experiment 7 options (the concentration of solutions of preparations and distilled water made: 1×10-3, 1×2×10-3, 1×3×10-3, 1×4×10-3, 1×5×10-3, 1×6×10-3, 1×710-3 of ml/l) and control - seeds, soaked in distilled water were studied. It was established that the con-centration of the preparation 1×2×10-3-1×5×10-3 was raising in comparison with control, the energy of germination for 4-14.7 % and the viability of seeds - on one-two classes of quality were most effective. The main part of seeds in the majority of used options of the experiments sprouts for the 5-th and 7-th days of the next calculation of sprouts. The activization of sprouts increase in length was observed in the seeds, soaked in the preparation of solution concentration 1×2×10-3-1×5×10-3, having caused excess over control for 5.6-53.3 %; on weight concentration of solution 1×3×10-3 - 1×5×10-3 were most effective.