This paper presents the results of research into the effects of various foliar fertilizers on the growth, development, and productivity of sunflowers in the foothill-steppe zone of the East Kazakhstan Region. The studies were conducted on the experimental fields of the East Kazakhstan Agricultural Experimental Station LLP, on dark chestnut soils. The aim of the research was to evaluate the effectiveness of using the biostimulant and micro-nutrient fertilizers Boromol, Terra Organico, Nitrogeno, Aminoturbo, Acadian, and Everbest Amino in conjunction with a baseline mineral nutrition program (NPK) for sunflower cultivation. The study examined the progression of phenological phases, the dynamics of above-ground dry biomass accumulation, linear plant growth, yield structure components, crop yield, and seed quality characteristics. It was found that the year's weather conditions were characterized by elevated temperatures and adequate moisture availability, which promoted the active growth and development of the sunflower plants. The most intensive accumulation of above-ground dry biomass was observed with the application of the Terra Organico product against a background of NPK mineral nutrition. The highest 1000-seed weight values ​​were obtained in the treatment involving the Acadian product. The highest yields were achieved with the use of Boromol and Everbest Amino; however, some of the differences relative to the control fell within the margin of experimental error. Research results demonstrate the positive effect of the studied preparations on specific growth and productivity indicators of sunflower and confirm the potential of their use in the crop cultivation technology under the conditions of East Kazakhstan.