A number of years ago I tried a Japanese Iris and planted it in the backyard. If I remember right it lasted a couple years with normal drip irrigation. I think the dogs had moved the drip irrigation line, which I didn't notice and it died. I did buy another one a few years ago and have it planted in to much shade (has not flowered in a couple years) but it hasn't died either! This last summer I bought another and have it in a pot of water in full sun. It looks fine at the moment. I'm so glad you posted that they don't like their crowns frozen. You may have just saved it from certain death. I always wanted to try to dig a hole and line the hole with a piece of pond liner (maybe with a very small hole in it for minor drainage) to plant the Japanese Iris in it.
I also have one white un-named PCI that's been doing fine and increasing for a number of years. I'll have to try to find a picture of it and post it tomorrow.
Marilyn, I don't remember where the business was other than a bit south or east of Sacramento, but they grew roses, bearded iris and Japanese Iris. I think the name of the business was Roseiris, or Rosiris. Rob, Marilyn, Sherry and Jan you might want to try growing one to see what happens.
