The article presents the results of laboratory studies on the effect of biopreparations Humate 7+, Growth Matrix, Ecorost, Azotovite and Phosphatovite on the sowing qualities and growth parameters of terrestrial and underground plant organs of the winter wheat variety Nemchinovskaya 57. The work revealed the stimulating effect of the studied biological compounds on the initial growth processes of seedlings. A significant growth-stimulating effect on root system development was observed. The excess in the root length compared to the control was 0.7–21.0 mm (102–145%). The effectiveness of the biopreparations on increase of the linear size of terrestrial plant organs was lower. The differences in the sprout length compared to the control were 0.9–3.5 mm (91–118%). The increase in weight of 100 sprouts compared to the control was 0–1.1 g, with maximum values in the variants Azotovit and Humate 7+. The maximum efficiency index was observed for the biopreparation Humate 7+.