The relevance of the conducted research lies in the need to diversify the fodder base of livestock production, in particular through the introduction of Poterium polygamum Waldst. et Kit. into organic fodder production, as this species contains biologically active compounds that act as natural animal growth stimulants. The aim of the study was to experimentally determine the suitability of this species for use as a component of organic feed additives, its technological suitability when grown in pure stands, and its potential for producing dry raw material. The research employed field, laboratory, analytical, and statistical methods. Low effectiveness of overseeding Poterium polygamum into grass stands on drained peat soils was established. In contrast, high technological suitability of the species was proven on typical chernozem soils of the Left-Bank Forest-Steppe, manifested in its ability to maintain weed-free stands due to the allelopathic activity of the root system, which is of exceptional importance for crop management and energy saving. Long-term studies demonstrated yield stability of Poterium polygamum, with an average fresh biomass yield of 11.7 t ha⁻¹, ranging from 9.4 to 15.5 t ha⁻¹, and an average dry matter yield of 3.2 t ha⁻¹, varying from 2.3 to 4.6 t ha⁻¹, which is sufficient for its inclusion in organic feed additives. The value of Poterium polygamum for organic fodder production is determined by the presence of biologically active compounds (flavonoids, tannins, saponins, etc.). The species also exhibits high feed nutritive value and good palatability, indicating its high potential for inclusion in phytomixtures for animal feeding. In addition, a database has been developed on sowing dates and methods, as well as optimal harvesting periods, enabling its effective use in organic fodder production. The inclusion of this plant in animal diets can contribute to the production of organic livestock products in compliance with the objectives of the European Green Deal strategy.