Spring Onions are very young onions that are harvested before the bulb has had a chance to swell. The small white bulbs and the long slender, leafy tops can be eaten raw or cooked. Milder than other onions they are a delicious accompaniment to summer salads. Although it is an immature onion it likes the same conditions to grow as other onions. which is in a cool climate. White Lisbon is reliable and hardy and is quick and easy to grow.