When the potato plant begin to bloom the first harvest is ready. Remove the inner bucket from the outer bucket and take the amount of potatoes you want. Spare the soil that falls out of the bucket. When finished, place the inner bucket in the outer bucket and place the soil back on top of the surface where you took the potatoes. The soil will repack around the rest of the potatoes. It can be necessary to add more soil, avoiding sunlight to the potatoes.

You can continue harvesting potatoes from the same plants until late autumn/early winter.