Onion – Vegetables: also known as the Bulb Onion or common onion in one of the most important and famous vegetable around the world with various types. It is a round vegetable with brown, red or white skin and many layers that has a strong taste and small. Onion sprouts in cool season which in +0 to +1 temperature has the best growth. Its close relatives include the garlic, scallion, shallot, leek, chive, and Chinese onion.