Once the potato vines blossom, you can carefully dig into the side of the hill to start harvesting new potatoes. Take only what you need so the potato plant can go on producing.
The backbone of the garden is the one-foot square. You take four of these one-foot squares and put them together in a grid. Separating these squares are paths, about a foot or two wide, so you don’t walk on the soil inside the four-foot areas. (Soil compaction is bad news in the garden. I lay board walkways in the garden so I can keep from mashing the soil. A light, airy soil is very good for plants.)