Do I need to freeze my rye flour?
Rye flour should be stored in the fridge or freezer. This is because the cold air will slow down the oxidation process which is what makes the flour turn rancid.  It will keep in the freezer for up to 6 months, slightly less in the fridge. Just give it a sniff when using it to make sure it is still fine. 

Make sure it is properly sealed before storing it because from my own experience, it has resulted in the flour tasting and smelling like the freezer (other food etc). Use an airtight plastic or glass container.