Flaxseed (ground) Per USDA FoodKeeper
On the counterCounter
Not recommended
keep it cold
In the fridgeFridge
12 months
at or below 40°F (4°C)
In the freezerFreezer
12 months
at 0°F; quality, not safety
Quick answer
Yes. Flaxseed (ground) lasts 12 months in the fridge and 12 months in the freezer. After that, or sooner if stored badly, it spoils: watch for the signs below.
How to tell if flaxseed (ground) is bad
Smell
Rancid: like crayons, paint or old nuts.
Taste
Bitter or soapy aftertaste.
Texture
Sticky or gummy residue around the lid.
Colour
Darkened or cloudy where it should be clear.
Flaxseed (ground) past the expiration date
Best-by and sell-by
FoodKeeper gives unopened flaxseed (ground) 12 months in the fridge, counted from the day you buy it. "Best-by" and "sell-by" describe quality and stock rotation, not safety; only infant formula carries a federally required use-by date.
Past the date
Flaxseed (ground) past its best-by date is usually safe if stored well; check smell, look and taste before using.
How to keep flaxseed (ground) fresh longer
- Keep in a cool, dark place, tightly closed, away from heat.
- Refrigerating nuts, seeds and nut oils extends shelf life significantly.
- Smell before using; rancidity is a quality problem you can detect.
More about flaxseed (ground)
FAQ
How long does it take for flaxseed (ground) to go bad?
12 months in the fridge, per USDA FoodKeeper.
Can flaxseed (ground) expire?
FoodKeeper gives unopened flaxseed (ground) 12 months in the fridge, counted from the day you buy it. "Best-by" and "sell-by" describe quality and stock rotation, not safety; only infant formula carries a federally required use-by date.
What happens if you eat bad flaxseed (ground)?
Usually an unpleasant taste rather than illness, but discard anything mouldy, rancid or smelling off.
How do you keep flaxseed (ground) from going bad?
Keep in a cool, dark place, tightly closed, away from heat.
Numbers on this page come from USDA FoodKeeper and FSIS guidance. Last verified November 2026. How we verify our data · Report a wrong number