30 INCREDIBLE DWARF SUNFLOWER Helianthus Annuus Flower Seeds BLOOM TIME: Late Summer - Fall HARDINESS ZONE: Annual PLANT HEIGHT: 15 - 20" . . . PLANT SPACING: 9 - 12" LIGHT REQUIREMENTS: Sun . . . SOIL / WATER: Average The Incredible Dwarf Sunflower has a stunning look with huge 10 inch bright yellow flowers on short stems that are just 15-20 inches. They are easily grown in containers, and attract bees, butterflies, and birds.