Coneflower, Purple Coneflower
This is a must have herbaceous perennial plant. It is perfect for Oklahoma! It gets 2′-3′ tall and produces beautiful deep pink, large, single flowers above the foliage. The flowers last a long time–true if you cut them too. My advice is to stick to the straight species if you are new to gardening–they will not disappoint. In the last 10 years there have been many cultivars introduced but I have found that they sometimes revert to a mutant form or they just don’t seem to survive after a year or two. I am not opposed to trying them again, its just that in Oklahoma I am more interested in finding plants that are really reliable. USDA Zone 3 to 8.