I am glad to hear you did not attempt the bury the same plant over and over again method! Apparently that is actually a myth. The vast majority of potato varieties are determinate and will not produce anything off the 'stalks' So burying it just means you have to dig REALLY far to get your potatoes!! Hope you have better luck next year!!
Thank you! I looked at the other tower and the wheelbarrow and they had died back some time ago but are now growing again.. Think im going to let these go for a while.. Not counting on much though as they were planted with the same non producing potatoes but who knows!