Onions are known as the Bulb Onion, Common Onion and Garden Onion. They are botanically called Allium cepa and well known to cause crying when being prepared, with many people attempting to find a way to prevent this.
Onions are grown from seed, where in colder areas it is best to sow them in early spring and in warmer areas late autumn to early winter. This is due to how onions take prefers cool weather to establish and warm weather to mature. They will need to be planted in full sun as the onion needs plenty of sun to be able to mature. Onions are easy to grow and it is advised to not grow them with peas and beans.