Allium fistulosum This Japanese bunching onion yields long, slender white stalks with a delicious mild flavor. Perfect for adding to soups and stir fries, and for a tasty garnish to any dish.  Tokyo Long White bunching onions can be direct seeded or transplanted into the garden in early spring through fall. They prefer full sun but can tolerate some shade, particularly in the hottest part of the year. Young scallions can be harvested in 65 days. 1 gram packet contains about 425 seeds.