Originally Posted by ultravista
Is it best to refrigerate or freeze grains for long term storage? Does it matter if milled or whole?
Milled grains will get old faster, though there is some debate about how much
quicker. Some people say they can detect staling in milled grains in as little as a week, but in a recent interview one of the head techies for Briess said that ground grains lose only about 10-20% of their shelf-life. If stored properly, whole grains are good for months or more, and I've stored milled grains for similarly long times without a loss in crispness or flavor.
How you store is important though. Cool, dry, and sealed. I am not aware of any real tests on grain freezing, but my intuition is that it isn't a great idea. With roasted coffee, certainly, you wouldn't want to freeze the beans unless you were planning on storing them for a year or more. I suspect that this applies similarly to grains, though I can't be sure.
Originally Posted by Gameface
Is there anything wrong with vacuum sealing small amounts of crushed grain?
Other than the work and the plastic, no down sides I can think of.