49-63 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 inch 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 seed, and an ideal grow for novice, busy, or limited gardeners.