Siberian irises didn't bloom this year?
I was thinking about things that did and didn't "work" in my garden in 2012. For some reason, NONE of my siberian irises bloomed this year. The foliage looked exactly the same(healthy) as it always does..the plants didn't increase much at all, they basically just stayed the exact same. One iris did send up bloom stalks, but the buds all shrivelled and turned brown before they opened.
Anyone have any idea what might have happened? It was quite a dry spring and summer, so I was wondering if maybe they didn't get enough moisture? I almost never water my perennial bed. Or maybe they got a late frost or something? I also didn't fertilize. What can I do different this year?