I treated all of my irises before the storms. It was sunny for the most part of February. I treated them again, before our rain and snow arrived, but it has been raining or snowing ever since. If it stopped snowing, the snow remained on the irises, slowly melting and keeping them wet. I will be surprised when the ground dries out from the last storms if there is no mold.
I am almost afraid to look, but I won't be going out in the rain today, since I can't do anything about until it stops raining.