Well, even in our brutal south, the butterflies thrive. The pros of a butterfly mix are that the flowers are chosen for almost continual blooming. It is small for a wild look, but if its that dry, choose a plant like Russian sage, then center other plants away from it in diff hts. I like the divided style, milkweeds Ohio grows are tuberosa (red orange), Purple, Syriacus (white and pinkish), Swamp. Fennel is awesome to grow as the foliage is beautiful, but may need a bit more watering, Cosmos, zinnia, even dill can be used. Yarrow?