"All the elegance and beauty of peonies and garden mums in an easy-to-grow annual. Rich plum-colored blooms avg. 2–3" with 13–20 stems per plant. Tower features uniform bloom time and plant height across the series and mix. Also known as summer aster." The photo and description are from Johnny's Selected Seeds, which is where I purchased the seed. They are an amazing resource for seeds, growing supplies, and reliable information, so it would be worth your time to check out their site!
