I've always had pretty much carefree iris. Maybe because I don't plant them so close together that I have to divide them very often. I've never had a problem with any bugs on mine, or anything else for that matter. I've only had to divide them every 3 to 5 years, and I don't feel bad about tossing the extras in the compost pile if I can't find anyone to take them. At my last house, I even had ground cover growing all around them, and they were never bothered by that. Maybe I was lucky, but I never found them to be much work at all.
