The onion is native to Central Asia, such as garlic and shallot. In the Middle Ages it was used in both culinary and pharmacy. The onion belongs to the Liliaceae family (garlic, leek ...). The onion is the underground bulb-shaped purplish red yellow a small plant, which has its green branches, round green, which are hollow inside. The white onion is harvested in late spring color and are collected in late summer. It is grown in all European countries of the Mediterranean and Arab countries. Although Mexico is the leading producer. It is a plant of temperate and humid, non-calcareous needs land, light, sound, deep and rich in organic matter.