In a tight bag in the freezer, 2 years. I'm fairly certain the comment below is for leaf, pellets would do even better.
"STORAGE STABILITY: very good, retained about 78% of its original alpha acids after 6 months room temperature storage"
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk