To tell if your farro has spoiled, rely on your sense of sight, smell, and touch. Pay attention to the color of the grain and look for pests; if you notice discoloring, mold growth, or bugs, it has likely spoiled, and it’s better to dispose of it. If it looks fine, but you still have doubts, give it a smell. Spoiled farro will smell off, and you will know immediately if it has spoiled. Lastly, feel the texture of the farro; if it is wet, it has been exposed to moisture and should be disposed of.