Thanks for everyone's input. I am at a loss unless they have gone dormant. Almost all of these plants are new to me in 2015. I received most in the late summer/early fall. All of them looked fine, though they did have a really bad case of aphids on them about a month ago because our weather has been so mild. I sprayed all the foliage with soapy water which seemed to cure the issue. They are in a brand new bed where I used mostly pine fines and top soil. I did add some lime to the mix as well as worm casings and alfalfa when I created that raised bed. I fertilized everything about 2 weeks ago with MiracleGro. We did get near freezing for 2 nights in a row last weekend. So I don't know if that is what happened or what. I covered them the coldest night with sheets and uncovered them the next day as it warmed up. I didn't see any frost burn on any of the foliage of the other daylilies. And we've had rain since. I can't remember if before the cold temps if there was foliage on these 2 cultivars. I don't think Raspberry Beret was there and I am thinking Calvary Stampede was gone too. In fact, I Raspberry Beret has been missing since before Christmas. So it either died or went dormant. I am almost going to guess dormant because I remember last winter after I first got it, I thought it was trying to die. It came back and bloomed just fine. But it was a rust bucket at that time. When I transplanted it in the raised bed in late summer, it looked much better and to my surprise, it had no rust this Fall, though a few others in the same bed did have rust.
The foliage on most of the plants seemed to die back just a little after the aphids issue. But almost all are putting on new growth now except the two cultivars that are now missing. We have had a lot of rain. Seriously, the foliage on those plants looked fine the last time I saw them, which has obviously been a while ago. Now there is nothing. Just an empty spot where they were each planted. My immediate reaction was slugs. But with all the pine fines, I don't know if slugs would be able to survive in that raised bed.
I sure hope they come back. I especially wanted to see Calgary Stampede bloom. It looks like a very lovely cultivar!
