We bought three prairie mallows last year. One died as soon as we planted it. Another is at the top of the hill on the right and is barely surviving under a shade tree. The third is this one, which has taken over the garden bed at the bottom right of the stairs.
I think it's gorgeous, with dozens of flower stocks. Phil thinks it's a little too successful. He wants to pull it out and donate it to the public staircase near our house. I suppose he's right, but I want to wait until late fall, when the rains come and we can rebuild the bed for spring.