Petal, thanks for the links on growing potatoes in a bag. I'm going to check them out. When I was at the old house, I had a cheap compbst bin that I grew potatoes in a couple years in a row. I chose the "fingerling" potatoes.....oh, to die for!!
The compost bin was the kind that is a flat piece of stiff plastic with air holes in it. Also there were a set of tall metal rod stakes with hooks on one end. You make a cylinder out of the piece of plastic, thread one of the rods through holes in each of the ends to hold it, and set it on the ground, then put more of the rods through other holes around the bin to support the sides, put a layer of compost in the bottom, layer of seed potatoes, another layer of compost, and keep layering. The vines grew out the side holes and formed the tubers inside. As the top layer grows up, you keep adding compost to cover all but the topmost leaves, they keep growing until the bin is full, then spill out over the sides and blend with the vines growing out of the "air slots" ...very pretty actually. Potato blossoms are quite nice, and the vines aren't shabby, either. (as long as you don't get potato bugs or something on them). In fall when you would normally dig the potatoes, you just pull out the rods and let the bin fall apart and you have a pile of more or less loose compost with potatoes you can just pull out of the pile of dirt instead of having to dig.
But the bag sounds even easier.
