I understand wanting an earlier start to the iris season, but then you've got the IBs and early TBs for that, and those of us on the West Coast have the PCIs (which frankly, look a heck of a lot nicer during the off season than the bearded irises do, not to mention needing FAR less maintenance).
Also, if you are so inclined and in the right USDA zone, you could try the I. japonica irises, which bloom earlier than the TBs.