My iris are located next to the house on the west side, under a large overhang, so it is a very dry bed. As dry as it has been, I plan on watering it this weekend. Other than that, I only increase the water for a bit when they are new. I don't think rot will be much of an issue this year though!
I had read (here or somewhere else) to fertilize at the beginning of bloom season and at the end. And yes, I use Miracle Grow. I am glad you said "a little" it will keep me from overdoing it.
I have some that need moved, I have a few larger iris in front of some smaller ones. And I have a niece that is looking for iris, so I will give her some from my larger clumps next month. Too soon for me to have much extra right now, but in a year or two, I will have more available for her.
And of course, I am already thinking of widening that bed a bit. another foot wider and I can add a LOT more iris.....
Something has munched on a few of them - even though I treated my iris when it first got warm, I am suspicious of iris borer. I found some last year in an old clump of NoID's when I was making this bed last year. I don't know the signs of borer so I am going to do a bit of research this weekend. I don't know any other "bugs" that bother iris - it could be something else too.