- You will get 1000 Seeds of Big Giant Leek, NON-GMO, Heirloom Vegetable Seeds. - Genus: Allium. - 1000 Big Giant Leek Seeds, NON-GMO, Heirloom. - Winter Hardy 16 inch Tender Stalks. - Known for its consistent size and great flavor, produces large, long, huge leeks! Easy to grow, just directly sow seeds in your garden in early spring.