Want to stop your potatoes from growing roots and becoming inedible? Put an apple into the bag with the potatoes! I bought two bags of potatoes around the same time. I put an apple in one bag and not in the other. LO AND BEHOLD SCIENCE:
I realize that this is not the most properly controlled experiment seeing as the top potatoes are russet potatoes while the bottom ones are white potatoes. However, I’m pretty sure this technique will work for all varieties of potatoes.
If you want to preserve your potatoes and keep them from sprouting, add an apple. Although the ethylene gas from the apple preserves the potatoes, that same gas causes fruit to ripen faster.