Teresa - Several sources say that newly planted iris may take until their second or third year to bloom. In my garden I get about 60 to 70% of them blooming in their first year. Most will then bloom by their second year. Those that take awhile for their first bloom in my garden tend to bloom every year after that. I do have a small handful that had never bloomed. I threatened to yank them out of the garden last year, so of course they all bloomed last spring!
Tom is right about individual habits, there are picky ones out there that only bloom every two years or so.
