50 HOPI / COMMON SUNFLOWER Helianthus Annuus Flower Seeds BLOOM TIME: Summer HARDINESS ZONE: Annual PLANT HEIGHT: 36 - 96" . . . PLANT SPACING: 18 - 24" LIGHT REQUIREMENTS: Sun . . . SOIL / WATER: Average The Hopi Sunflower attracts bees, butterflies, and birds with its lovely 6 inch flowers.