Learning to homebrew
Fortunately, hops can last up to FIVE years inside a freezer if follow a few basic rules.
Compared to other beer ingredients, hops can be quite expensive.
Hops get their flavor and bitterness from alpha acids contained in their resin
Increased exposure to heat, oxygen, or light will cause these acids to break down and oxidize more quickly.
Dried whole hops that are vacuum-sealed will last up to 2 years in the freezer and about 6 months in the fridge.