I've never purchased a tissue cultured Peony, but other tissue cultured plants I've gotten were in tiny pots like Frank mentioned. They will typically be potted, as they're not big enough to have much stored energy in the roots yet- almost like a little seedling. The first time I received a tissue cultured Elephant Ear, I was so disappointed- it was hard to believe that tiny thing in a 2" pot would ever be the gigantic plant I was hoping for. But tropicals often mature quickly once growing conditions are right, and it did get big. Peonies already require some patience, so its surprising to me that vendors are selling them that way.
