I received a couple of rhizomes from an ATP friend of Fantastic Blue. I have never heard of anyone having a problem growing this one and it is a gorgeous little IB. It did very well.
And who could leave out an iris that grows like a weed. TB Thornbird. Here is a photo that I took this spring of it after thinning it last year to only three rhizomes. Look at the potential blooms on those stalks.