I have a big problem with voles so i haven't added any for many years. The ones near the house seem to be voleless. They are making bigger and bigger clumps but they are the basic red and a nice purple fringed one. I once put a million hearts delight across the base of my stair garden which is quite a long run but only one is still there. I love the striped leaves on those kaufmaniis. I do have lots of turkestanicas near the house again that always do great. I adore them. Here's Heart's Delight in 2004.