This article presents data on the effects of semi-rotted cow manure applied as a primary fertilizer and vermicompost applied during the growing season as a top dressing on the agrochemical properties of the soil and the yield of the medicinal plant lavender. The application of 10 t/ha of vermicompost in the form of two 5 t/ha top dressings during the growing season, combined with 30 t/ha of semi-rotted manure applied before fall plowing, significantly increases the content of mobile nutrients and thereby improves plant nutrition. This ensures high lavender yields in organic farming.