A quick guide to what's safe, what's risky, and what's gross.

Add Yahoo as a preferred source to see more of our stories on Google. Potatoes growing out of soil covered in dirt - Guido Mieth/Getty Images When looking at a giant pile of spuds in the grocery store ...

Potatoes are in most kitchens, but like all fresh produce, they do go bad. Potatoes can be stored for quite a while in a cool, dry place; it is not advisable to let them out over an extended period.