About this item Sunflower Seeds for Planting – This planting packet includes 50 Mammoth Grey Stripe sunflower seeds (Helianthus annuus). Mammoth grey stripe sunflowers are some of the tallest sunflowers in the world. These flowers grow 9-12 feet tall with sun bursting yellow flower petals. Non-GMO Heirloom Sunflower Seeds – All of Axel’s Garden Seeds are Heirloom & Non-GMO and are intended for the current and following growing seasons. Fresh garden seeds are always provided. Planting Packets with Instructions – Our colorful planting packets include all the necessary information to grow these flowers successfully. Each packet is 3 x 4.5 with a beautiful full color illustration on the front with growing instructions on the back. Easy to Grow – Plant these seeds ½ inch deep in well-drained soil. Wait just 90-110 days for matured Mammoth Grey Stripe sunflowers. If any problems occur, Axel’s Garden Seeds will provide whatever is necessary for your gardening needs. Variety of Seeds for Home Garden – Axel’s Garden Seeds offers unique fruit, flower, herb, and vegetable seeds. Each packet is hand packed with high-quality garden seeds.