An onion (Allium cepa L., from Latin cepa meaning "onion"), also known as the bulb onion or common onion, is a vegetable that is the most widely cultivated species of the genus Allium. The shallot is a botanical variety of … See more

The history of ancestral onion species is not well documented. Ancient records of onion use spans western and eastern Asia, so the geographic origin of the onion is uncertain. Yet, … See more

Nutrients
Most onion cultivars are about 89% water, 9% carbohydrates (including 4% sugar and 2% dietary fibre), 1% protein, and negligible fat (table). … See more

The onion plant (Allium cepa), also known as the bulb onion or common onion, is the most widely cultivated species of the genus See more

The onion has been grown and selectively bred in cultivation for at least 7,000 years. It is a biennial plant but is usually grown as an annual. Modern … See more

Onion types and products
Common onions are normally available in three colour varieties:
• Yellow or brown onions (called "red" in some European countries) are sweeter and are the onions of choice for everyday use in See more

Onions are best cultivated in fertile soils that are well-drained. Sandy loams are good as they are low in sulphur, while clayey soils usually … See more