We grew them - years ago - in a wooden box.
Every time we saw green leaves coming through we put new soil on it. So the potatoes grew from the bottom to the top having new potatoes also from the bottom to the top.
It was like digging for gold when we got the out there :)
HIVE ON!!!
Yeaah I know. Another guy said just put them into the soil cover them up and they will come out themselves. And they did, but I just put them all to the bottom next time to get more and bigger yeald. The thing is with these pots they can easily be harvested you don't have to dig. Now I will fill the pots with hydrosubstrate and 4 potatoes and set it up with my aquaponics system with tomato fertilizer. I only need 8 sprouted potatoes now. Next time I will do it in front instead of after the harvest now I lose 2 weeks.