I thought it was only specific iris varieties??? We have a few in the yard, not that I have any idea of what they are (didnt buy them, saved them from demo areas). All of them have died back except one cluster that still has all it's greens (it's in the 40's here now during the day).
After removing all the tropicals, I think all that we have left outside is mares tail, curlie mint, parrot feather, water cress and water celery...
What I need the most are hardy plants that can tolerate down to 0*F (only actually get wind chills that low, usually stay above the teens in the worst of a nasty winter) that we can plant into the bog and just leave them there (unless they get crowded and need thinning). If it is an invasive species, all the better... I would rather be tearing extras out than trying to plant more LOL.
Aside from veggies, and starting a few flowers inside, I am not that into "plants"... I start the flowers I do, mainly to keep hubby out of the nursery LOL. I'm more interested in trees and evergreens... My idea of a pretty bed has a mix of things like barberry (hubby hates them, but gave in and let me get some LOL), euonymus, hinoki cypress, azalea, a thread leaf maple, blue rug junipers, and maybe petunias (for purple) and marigolds (for orange).