Those are beautiful!
I think the problem I had with the Becky type Shasta was that it forms a huge dense clump. I still have them just in a different area and Iwant to move them. They need a big space. I am looking for something that just pops through the other plants here and there to fill in gaps between Daylilies and other perennials. The Daylilies don't bloom until later on in July and I have Dafs in there so it has to be something that doesn't spread much but just scatters about.