Our potato box was very productive. Last spring we started our potatoes in this approximately 3′ x 3′ box. As the vines grew we added boards to the box frame, layer by layer, and piled in straw with each layer until the straw was about 15″ deep. I harvested the bounty today and reaped about ten lbs. of potatoes and there may be even more below the level I dug to. Ten lbs. is certainly not enough to last all winter but we now have the confidence of knowing the method works for us. The earth I turned over is amazingly rich in organic matter, earthworms, and other good stuff. I suspect we’ll try again next year.