Seed Needs, Red Sun Sunflower (Helianthus annuus) 120 Seeds Quality Red Sun Sunflower seeds packaged by Seed Needs. Intended for the current and the following growing season. Red Sun will produce beautiful bright red blooms that span 5 to 6 inches in diameter. This sunflower variety grows to a mature height of 5 to 6 feet tall. Red Sun Sunflower is an annual flowering plant. Annual plants will grow quickly, bloom profusely and later die with the first killing frost. Each seed packet measures 3.25" x 4.50" in dimension. The front displays a colorful illustration of the flower and the back displays detailed sowing instructions to grow them. All Sunflower seeds sold by Seed Needs are Non-GMO based seed products and are intended for the current & the following growing season. All seeds are produced from open pollinated plants, stored in a temperature controlled facility and constantly moved out due to popularity.