I am growing Potatoes in 7 gallon smart pots (as recommended by Irish Eyes who I purchased the seed potatoes from). I have run into one problem so far...keeping them watered. I am afraid I may lose two pots worth. the size of the foliage on all of them is easily double the size of the pot.
I do like the notion of folding them up for storage, but if I do potatoes in them again, I will certainly use larger ones.
Update...I thought I had lost them, but they were actually "done" and the foliage died back. It was my first time growing
Potatoes. I'm on year 2 now....