The Welsh onion is a perennial plant known for its edible green leaves and small bulbs. It belongs to the species Allium fistulosum and is often used in cooking for its mild onion flavor. Unlike common onions, Welsh onions do not form large bulbs but instead produce clusters of small, elongated bulbs. These onions are hardy and can thrive in various climates, making them popular in gardens. They are often used in salads, soups, and stir-fries. Welsh onions are also known for their nutritional benefits, as they are rich in vitamins and minerals, contributing to a healthy diet.