Big, round Walla Walla onions are famous for their sweet flavor and are the best mild onion choice for the North! Well-grown bulbs can reach 2 lb. apiece and will store 2-3 months. 75 plants per bunch. Loved by gardens and trusted by gardeners, Burpee© has been introducing fresh garden breakthroughs since 1876. Burpee offers only the highest quality, non-GMO seeds, hand-picked by expert horticulturalists to thrive in your home garden.