90-100 days. Autumn Beauty Mix Sunflower Seeds. Helianthus annuus. Open Pollinated. Non-GMO Autumn Beauty Mix seeds grow one of summer's most explosive and familiar bordering flowers. Autumn Beauty seeds promise your garden brilliant 10" heads bursting with a mix of bronze, golden, purple, mahogany, and yellow sunburst. Autumn Beauty sunflower seeds grow up to 60" tall and its countless seeds serve as a natural bird feeder all season long. Autumn Beauty Mix seeds are a simple and easy to grow addition in many hot and drought-prone gardens across North America. ~1,700 seeds/oz.