My childhood home is a 3-floor, 2-family house in a middle-class (then; now, precede with “lower”) neighborhood in Queens, New York City. As spacious as it was, especially to a child, our backyard was typically small – no larger than what’s in the foreground of this Google-search-acquired photo:
But, not long after Summer had arrived, my sainted Mom produced produce that rivaled any local market in quantity and far surpassed them in quality.
I thought of her the moment I saw this – a clever method grows up to 100 pounds of potatoes within a 4-foot-square footprint by going vertical. This article at Tipnut details the method, variations and details – this illustration among them.