Mixed cornflowers -- the dark maroon color is also called Black Ball Cornflower. Here in zone 5a, we simply throw the seed on the ground in late fall in one of the goldenrod beds. The cornflowers provide color all season. I rip them out when the Solidagos and Vernonias come into flower. You can see one of the Vernonias just growing up through this mess in the upper right hand corner.