Here are some of the best heirloom Spinach seed varieties: America Heirloom spinach seeds, Bloomsdale Long Standing Heirloom Spinach seeds, Bloomsdale Savoy Heirloom Spinach seeds, Giant Thick Leafed Heirloom Spinach seeds, Viking Heirloom Spinach seeds, Monnopa Heirloom Spinach seeds, Strawberry Heirloom Spinach seed , New Zealand Heirloom Spinach seeds, Viroflay Heirloom Spinach seeds, Giant Noble Heirloom Spinach seeds, Gigante d'Inverno Heirloom Spinach seeds, Merlo Nero Heirloom Spinach seeds, Monstrueux De Viroflay Heirloom Spinach seeds, and Red Malabar Heirloom Spinach seeds (not a true spinach).