Question about Zeller Present potato pots

Not really in practice. It depends very much on the ripeness of the potatoes. When they start to sprout, just boil them all and put them in the fridge. They can easily be kept there for a week.

In principle, yes. In the pot, the potatoes are protected from light but still ventilated. These are good conditions. Nevertheless, not quite as good as in an optimal cellar.