A. patens is one of the best named varieties of what have become popular garden plants. All grow from a strong clumpy, dividable in spring, and make strap like basal . Flowers are carried in a clustered head, topping smooth 2-3 feet tall. They respond to good soil and to moisture during the growing season. Modern varieties are hardy, and all flower from early July to September. A. ‘his’ is a deeper blue than patens, and A. ‘Profusion’ is a rich light blue, very free to flower. Apart from the named varieties, A. ‘Headbourne Hybrids’ are a strain that includes various shades of blue, with some variations in height as well. Being raised from they are of course less expensive, but any of the above are a good investment, both for garden decorations and for .