Potato Box Update 1

The potato box is now 4 levels high (~3 ft) with potatoes I planted in mid-May.  This means there is approximately 12 cubic feet of potato growing space in the box so far.

I still have 2 or 3 more levels to add to the box if the plants continue to grow.  The plants are starting to think about flowering, so I'm not sure how much more vertical growth I can expect.