Currently, medicinal plant growing is one of the promising areas of activity of agricultural enterprises in the Russian Federation. This area has a high economic potential. The deterioration of the general ecological situation, the instability of weather conditions have a negative impact on the growth and development of medicinal crops, leading to a decrease in plant resistance to stress factors and the inability to fully realize their potential with cultivated varieties. Plant growth regulators are one of the most promising groups of pesticides, the advantages of which are that they are harmless, environmentally friendly and highly effective at low consumption rates of biologically active substances of polyfunctional action. Exogenous use of growth regulators makes it possible to activate physiological and biochemical processes, regulate individual stages of morphogenesis, in order to mobilize the potential of the plant organism, aimed at overcoming unfavorable environmental conditions by plants, increasing their resistance to harmful organisms and ensuring optimal productivity. On the territory of the collection nursery of the Middle Volga branch of the FSBI VILAR in 2018-2020, an experiment was carried out in order to study the effect of growth regulators and micronutrient fertilizers Zircon, Epin-extra, Ferovit and Siliplant, on the resistance of plants to unfavorable growing conditions, increasing the yield of inflorescences and seeds of calendula officinalis. Ferovit turned out to be the best result of application in the raw material areas for three years of research in the prevailing weather conditions. The average yield of raw materials of air-dried inflorescences was 2.10 t / ha, which is 0.45 t / ha more than the control variant. On seed plots, the best indicators were obtained with the use of Siliplant micronutrient fertilizer 1.25 t / ha, which is 0.2 t / ha more than the option without the use of drugs.

It is possible to optimize the bioproductive process by adjusting the hormonal status of the plant organism. In this regard, in the development of advanced growing technologies in medicinal plant growing, much attention is paid to the use of natural bioregulators for the treatment of seeds and vegetative plants with various active substances. The development of an effective system for the use of growth regulators and microfertilizers is an important link in resource-saving technologies for medicinal crops, since they are environmentally safe, harmless and highly effective at low consumption rates of biologically active substances of polyfunctional action. In 2020-2021, in the Middle Volga branch of the Federal State Budget Scientific Institution VILAR, an experiment was conducted to study the effect,of growth regulators and micronutrient fertilizers on the growth, development, increasing the yield of Ammi majus L. fruits. For two years of research, Albit showed the best results in the use of raw material areas, the average yield of Ammi majus L. fruits was 819 kg/ha, which is 162 kg/ha more than the control variant.