I’d pretty much given up on growing potatoes this year since we didn’t have a new garden plot for the mounds. Then I happened upon a solution that, though old news for some, was good news for me.
The idea is to build your first mound in an old tire, wait til the plant tops are about 8″ high then add another tire, repeating the process until the mound is 4 tires high, a sight that is not all that unusual in my neighborhood. (Even so, I’ve hidden them behind my husband’s wood shop for the refinery’s eyes only.)
The first potato plants’ growth is sort of stunted when more dirt is piled on and it becomes a root again, climbing upward toward the surface, sending out more roots laterally to make many more potatoes. It sounds as though the warmth of the tires aids the process.
Don’t ask me how long this will take, or if we’ll have enough spring this year to really grow 4 tires worth, or if I planted the seed potatoes deep enough, or anything else, because all I know is the stuff on this one website. I’m making the rest up as I go.