Perhaps a little closer to natural habitat conditions, Iris suaveolens grows smaller for me than you, Mark. I don't get nearly the amount of rainfall here compared to Massachusetts, especially these last few years. In flower, the yellow form is 4-5 inches tall. The arcing of the leaves is more pronounced, too. They are evergreen even in Minnesota, and surprisingly unscathed by our winter sun in snow-wanting seasons.
I dug and divided all my I. suaveolens last summer, and they seem to not skip a beat. Bloom this spring is very ample. And although the first flowers opened April 8th, they are still blooming now.
