The watermelon variety STIMUL is a mid-season culture with a maturation period from germination to marketable maturity of 89-97 days. The plant is long-vined, the fruits are spherical in shape and weigh from 2.8 to 6.0 kg. The watermelon flesh is intensely red, juicy, and very sweet with a characteristic watermelon aroma. The variety is distinguished by its drought resistance, good transportability, and storability, making it convenient for storage and transport. The marketable yield is 88-125 centners per hectare, and the seed output reaches 0.33%. To increase yield and improve fruit quality, the use of specialized fertilizers is recommended for STIMUL variety watermelons. The organic fertilizer Stimul promotes active fruit set, increases fruit size, and improves their taste qualities. It provides plants with full nutrition, compensating for the deficit of macro- and microelements, and also enhances resistance to diseases, rot, and freezing. In addition, the fertilizer STIMUL-NPK, developed for fruit crops, strengthens plants, stimulates fruiting, and accelerates crop ripening. It improves fruit quality, making them juicier and tastier, and also enhances plant immunity, protecting them from diseases and pests. The preparation contains macro- and microelements, as well as vitamins, which contributes to harmonious development and full growth of plants. Fertilizer application is possible both foliarly and through the root system, which ensures maximum efficiency.