rtj1211,
Just reviewed the previous posts and I can now see where your coming from.. I think you misunderstand what I actually said which was “you get 3 times the crop you might expect from one 30cm Pot”. So if you expect to get 10lbs from one plant in a 30cm Pot you might reasonably expect to get 30lbs from 3 in a Potato Planter. I personally managed 23lbs from one Planter last year and the other 11 Bags gave similar yields.
Don.