It lasts years and years if it has not been powdered, but powdered bark does loose potency much quicker. I can't give you a date, but you should only have minimal losses if you use it within a few months (stored in the freezer).
For long term storage whole bark is best.
Anyone please correct me if I'm wrong, but I think it is better to extract and store the extract in good conditions (no moisture, no oxygen, low temperature) than trying to store powdered bark for long periods of time.
The Spice extends life
The Spice expands consciousness
The Spice is vital for space travel
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Never underestimate the power of STUFF!
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