Like brown rice, oxygen makes the essential oils in the seed go rancid, giving it a bad taste and making it unfit to eat. So, when storing buckwheat for long term storage, be sure you place it in airtight containers and use oxygen absorber technology which should give it a long storage life.

Is it safe to eat expired buckwheat?

Whole grains won't expire for up to 12 years

Hard grains like wheat, buckwheat, millet, and spelt are good for 10 to 12 years when stored whole in an oxygen-free environment.

How long does Kasha last in the fridge?

The shelf life of buckwheat can be up to 2 to 3 months in the refrigerator and 6 months or longer in the freezer when stored correctly. Buckwheat must be tightly wrapped to reduce the possibility of the grain absorbing moisture from the refrigeration compartment.