You Will Get 10 Seeds Chasmanthe Floribunda African Flag. It is a beautiful plant that gets clusters of bright orange to red flowers which develop into unique seed heads, and tall green foliage.. These beautiful plants are perennials, and are generally hardy to at least zone 7b, possibly colder, and they grow best in full sun to part shade.. They would make excellent additions to your rare plant collection, or just make a unique statement in your yard.