Irises: Any idea why my iris won't bloom?, 1 by guardians

guardians wrote:
Here's a pic of one of the replanted clumps. This one gets almost full sun, the other one gets some afternoon shade. Both clumps are about the same size, and earlier this spring before they got so dense, it was apparent that these were the"daughters", as the center was empty and surrounded by four plants.

Please excuse the weeds; it's all I can do to do a little every day, and right now the veggie garden is taking most of my time. That and my little helper.