Store shelled or unshelled walnuts safely in an airtight container and store in a cool, dry place. The refrigerator is a great choice as walnuts will remain fresh for up to three months. ... When purchasing walnuts in bulk it is best to transfer the nuts into airtight containers when you get home.

How long do shelled walnuts last at room temperature?

Properly stored, shelled walnuts will keep well for about 2 to 4 weeks at normal room temperature. To extend the shelf life of shelled walnuts, refrigerate them; place walnuts in a sealed airtight container or place original package in a resealable heavy-duty freezer bag.

Do shelled walnuts go bad?

Walnuts do go bad. This is because of the oil inside walnuts, which turns rancid after a while and gives them a bitter taste, making them unpalatable. ... As stated before, shelled walnuts go bad faster than unshelled ones. If you keep them in the fridge, they will not turn rancid before six months.