- You Will Get 25 Seeds Of Ebony & Gold Sunflower Helianthus Annuus Flower Seeds. - Description: - Name: Ebony & Gold Sunflower. - Scientific Name: Helianthus Annuus. - Color: Gold Double Blooms With Brown Centers. - Plant Seeds: Outdoors After Frost / Indoors Weeks Before Last Frost. - Plant Height: 72 – 96. - Plant Spacing: 9 - 12". - Bloom Time: Late Summer - Early Fall. - Hardiness Zone: N/A (But Reseeds Itself Easily, So It Acts Like A Perennial In All Zones). - Light Requirements: Sun. - Soil & Water Preferences: Average.