Dot, I have pretty much the same problem with intermediates, and especially with SDBs. It just doesn't get cold enough here for them to keep blooming each year -- bummer! I tried for years and have given up on them very reluctantly over the last couple of years. And in fact I've noticed that many of the TBs from colder climates don't seem to do so well for me either, and the plants that are actually grown here in California do the best for me. That won't stop me from trying new introductions from up north, of course, but I am slowly getting a little wiser. I'm concentrating now on TBs, although now what I'm REALLY concentrating on is daylilies!
I think that intermediate named for you is really pretty, by the way. And what an honor to have an iris named after you -- that's terrific!