The article describes the influence of the use of microelement zinc, copper, manganese and cobalt when growing melons on nitrogen-carbohydrate metabolism and melon yield. For the study, 3 varieties of melons were taken: the early-ripening variety Amiri and two late-ripening ones - sari Gulyabi and kzil Gulyabi. The seeds of these varieties were soaked for 2 hours in 0.02% solutions of micronutrients, after drying they were sown in the field. Studies have shown that the dynamics of the content of microelements in the leaves were different for the varieties taken. A decrease in the copper content in the flowering phase is characteristic, which can be explained by the movement of microelements from the vegetative organs to the reproductive organs during the most critical period of the plant's life. For manganese, there is mainly an uninterrupted increase in the amount of leaves. The leaves were especially intensively enriched with microelements in the flowering phase when they were introduced into the soil when the root system was vigorously working. Therefore, the most effective, presumably, is the method of introducing it into the soil.