My reclamation project along the fenceline means that every single Iris there is either new, or transplanted from somewhere else -- over the course of the past two years. I don't know how many Irises are planted there -- a couple hundred, no doubt -- and I have lost only one. It's no coincidence, I don't think, that the pecan and maple trees on that side of the house drop their leaves which then blow into those Iris beds. I leave them in place over the winter, and rake them out in the spring.