What do they grow to when they are rooted to the entire earth?
Potato plants grown in the ground and in containers don't get more than a foot tall and are very bushy. That one is ginormous! Hopefully, little potatoes are growing down there - I can't imagine they aren't. I do think, normally, given the entire earth to root in, they only grow about a foot deep. Potato bags and boxes are only about 18 inches deep. So back to my question: Did you plant the seed potatoes at the very bottom of the first can?
But what a great experiment in potato growing! I can't wait until you dump that container. Take photos of the results and post them for us.
