Allium cepa, commonly known as the onion, is a bulbous plant in the Amaryllidaceae family. It is widely cultivated for its edible bulb, used in cooking worldwide. Onions are biennial but often grown as annuals. They have hollow, tubular leaves and produce spherical flower clusters. Varieties include red, yellow, and white onions. Rich in vitamins and antioxidants, onions have culinary and medicinal uses. They thrive in well-drained soil and full sun.

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