I’ve tried container potatoes including a tall 35 gallon garbage can .....pitiful harvest...
Try 5 gallon buckets and use baby reds or the small yukons. I just get them at the store,wait til the buds form then cut them in sections and lay them on about 6 inches of soil and cover with 2-3 inches of soil. As they grow I just keep adding soil til the bucket is full. Works every time.