Potato planting

I left a container of 9 organic potatoes I bought from the store to sprout over the last month and a half. HtGMV says to leave place your seed potatoes in a 3-inch high box and to keep them in a place at room temperature with some air flow and indirect light for a few weeks before you plant them. Here are mine today:

I read a while ago about planting potatoes in a stack of tires. I looked it up again and came across this article. The idea is to plant your potatoes in a couple of old tires filled with soil, and as soon as the potato plant grows to about a foot high, pop another tire on the stack and fill it with soil so that only 2 inches of the plant is now showing. Each time you do that, the plant will grow new tubers in the freshly added soil.

I knew I could rely on my neighbourhood railroad corridor to provide me the needed abandoned tires:

For my first mound, I stacked two tires on a section of concrete that lines my backyard gate, filled them with about a foot of soil mixed with compost, and arranged my spuds on the soil, spaced about 9 inches apart:

I filled the rest of the stack with more soil and compost. I did the same for a second stack, and voilà: