Irises foliage is drooping
About a month ago, a friend gave me over 20 established rhizomes that she had pulled up from her garden. They were already past bloom at the time. I wasn't able to get them in the ground for about two weeks. I was finally able to plant them about two weeks ago, and the foliage droops more every day. Hardly any of them are erect anymore. I have no idea why, or what I need to do. They are in a sunny location, planted shallowly in loose soil. I think I may have been overwatering at first, but they continue to get worse even though I have not watered in a few days. What do I need to do to perk them back up? Help!