Mammoth Grey Stripe Sunflower (Helianthus annuus) is a very popular variety of sunflowers best known for its towering height and beautiful broad flowers. Native to North America, this annual can grow to be 12' tall and have flowers up to 20" wide, but mostly average 10' tall and around 12" wide blooms. The large seed heads produced by the plant are excellent for harvesting for yourself or simply leaving out for the birds ***Seed count is approximate, whereas weight is exact Germination in 5-14 days, maturity in 120 days Collected: 11/24 Germination: 85% nBuy Seeds Online Organic Seeds Heirloom Seeds Non-GMO Seeds Vegetable Seeds Flower Seeds Herb Seeds Fruit Seeds Garden Seeds Seed Starter Kits Rare Seeds Bulk Seeds Indoor Gardening Seeds Seed Catalog Seed Packs for Sale Sustainable Seeds Greenhouse Seeds Seed Suppliers Planting Seeds Home Garden Seeds