I had to lift or cut down a plant today, so I decided to lift the pot tuber. First, the 4" plastic pot was completely intact. Roots had grown over the top and out from the bottom, but no tubers escaped. Since I want to keep this one growing over the winter, I could've taken it and put it straight into another pot, but I decided to remove the plastic pot to see what pot tubers looked like.
Notice how small the tuber is for this plant. The plant itself is ~30" tall and wide, with many blooms and buds still.
Apart from being smaller, there's really no visible difference between it and a field clump. Of course this is what I expected, but its nice to see it myself.
It will be interesting to see if there's any difference between this clump, and say, one from Gladiator or some other tall A/AA.