Cosmos flowers (Cosmos sulphureus) feature eye-popping papery yellow and orange blossoms approximately three to four inches in diameter. These bright flowers quite literally light up any garden or field. They grow well in hot climates, have a degree of drought tolerance and a sustained blooming period of many weeks. We add a few stems each to our farmer’s market bunches and they always sell out by the end of the day.65 days from seed to flower. Annual. Grown at Mano Farm in Ojai, California.