The purpose of two years of work was the determination of some chemical elements in onion (Allium cepa L.) between the two cultivars: Stuttgarter-Netherlands and cultivar of Prizren-Kosovo in different periods of planting and various preservations conditions of bulbs at room temperature and +5(°C).In the first experiment year is planted the seed while in the second year was made the bulb. Is ascertain is a difference between cultivars in the content of minerals substances