I have a few cultivars that grow with that "neck" thing you're speaking of, Caitlin.I think all of them try to do it to a certain degree, especially if they are planted a little on the "deep" side. As far as those "bulletproof" iris, I have a NOID "pink"( more orchid, really), that I THINK may be Pink Satin, that's one tough iris! It's survived about everything, ansstill carries on! Wabash is another of the ones that is seemingly indestructible....Arlyn