>>1434087It is highly feasible. People do it all the time. Spacing requirements are based on cultivar, so you'll need to look that up specifically. Then based on the method which can be radically different from industrial farming.
Check out the, "square foot gardening," method. If you try the potato tower thing, make sure you use indeterminate potatoes and that your growing season is a long one. Determinate potatoes can't be grown in a potato tower that fills in over their stems all the time. Determinate potatoes can grow in side-growing potato towers, where the tower is built and filled full before the plants sprout; the potato plants grow from the sides. The latter type is what you see in this image. vertical farming like this is a great way to grow more in a smaller are. If you do this type of thing, only plant the potatoes on the sun-facing side of the tower. On the shade side of the tower plant lettuce, cole crops, and other cool weather crops.