Annual plants, very easy to grow from seed. The flower was named after Johann Gottfried Zinn (1727-1759). Flowers of the Zinnia are found in a multitude of shapes and sizes. Most common are the multi-petaled ball shaped blossoms and the daisy shaped blossoms. Blossom sizes range from 1/2 inch across to 3 inches across. Zinnias are a wonderful, highly colorful mass flower for summer arrangements.