when can i transplant irises
There are now reblooming iris available that rebloom in the fall. The rebloomers can be divided in the same way as the one-time bloomers. The best time to plant or transplant iris is after flowering through August. Iris are one of the few perennials to transplant during the hottest part of the year. Established plantings of iris should be divided every 3-4 years or whenever the clump becomes crowded or when flowering decreases.