Because irises are drought tolerant, doesn't mean that they need to be kept dry. You don't want excessive moisture, but well drained conditions are best. I had a friend in Arizona who was quite successful getting them to bloom by putting ice on them overnight during the coolest part of the season. She seemed to have the most success with the irises that originated in the hotter California climates. You should probably try the Arlbred varieties, as they like hot weather, but they are desert irises and need dry conditions. Good luck. It won't hurt to try your experiment with a few in the fridge, the worst that could happen is that they would die.
You could add a light inside to keep them alive. You could also control the temp. Worth a try at least.
