Cosmos Seeds - Sonata Mix49 63 days. Sonata Mix cosmos seeds grow an effortless and full sun performer perfect for just about any garden in the country. Sonata Mix seeds quickly mature into robust 20 24 spreading mounds popularly left trailing from planters, window boxes, or as an elegant border out in the flower bed. Sonata Mix cosmos seeds promise unique daisy like blooms in a seasonal mix of rose, white, pink, and magenta. Sonata Mix cosmos is tolerant, easy to grow from