I currently have planted Iris virginica (which is growing like wild and has already bloomed this year), Iris versicolor (which is barely growing at all).
I also have Iris albicans, and Iris florentina. I will be getting Iris germanica. I think the "bagged Garden Soils" from my experience are just to Wet. They are wet in the bag and they stay wet once you use them.
I actually created my own garden site by using Compost and Garden soil. I did not amend my existing soil
at all (I couldn't get access to it because of pachysandra and stones that were on top of the actual soil).
I think that was my first mistake. But I went ahead and planted some of my rhizomes. Many have actually
done quite well. I just think the 'bagged Garden soil' stays to wet and is to rich for bearded iris, and I really
don't know where I can find real "Dirt".