Heirloom - “Walla Walla” Sweet is one of the world’s mildest onion varieties. It is the sweetest, juiciest onion that can be grown at Northern U.S. latitudes. This large, flattened, yellow onion variety was first planted in the fertile valley near Walla Walla, Washington, at the beginning of the 1900’s. Over the years Walla Walla Sweets have become famous for their mild taste. Plant in sun. (Maturity: 115 days) (Allium cepa ‘Walla Walla’)