Outsidepride Helianthus Annuus Wild Sunflower Seeds - 1 LB Wild sunflowers are grown from seeds in USDA Zones 3 - 10 and grown as an annual. These large flowered sunflowers reach nearly 10 feet tall. One of the easiest flowers to grow from seed, Helianthus annuus, or Wild Sunflower, grows in the wild in much of the United States. This annual grows quickly and produces colorful yellow-orange blooms with dark brown center disks. Sowing Rate: 8 ounces per 1,000 square feet or 22 pounds per acre of these sun flower seeds