What is the shelf life of green unroasted coffee?

Green coffee is the raw, unroasted seed of the coffee cherry. Because it has not yet undergone the Maillard reaction and pyrolysis that create the complex flavors of roasted coffee, it is significantly more stable. However, it is still an agricultural product that is subject to environmental factors. The shelf life of green coffee is primarily determined by its moisture content and the conditions in which it is stored.

Ideally, green coffee should have a moisture content between 10% and 12%. If the moisture content drops too low, the coffee becomes 'brittle' and loses its acidity and sweetness, resulting in a flat, papery taste. If the moisture content is too high, the coffee is at risk of developing mold or becoming 'musty.' To maintain this balance, green coffee should be stored in a climate-controlled environment with a stable temperature and humidity level.

In the industry, green coffee is often stored in 'GrainPro' or similar hermetic bags. These bags create an airtight barrier that protects the coffee from moisture, pests, and odors. When stored in these bags and kept in a cool, dark place, green coffee can remain in excellent condition for up to a year. After that, the coffee may start to show signs of aging, such as a loss of brightness and a more muted flavor profile.

In practice, if you are a home roaster, you should treat your green coffee with the same care as your roasted beans. Keep it in a cool, dry place, away from direct sunlight and strong odors. If you have a large quantity, consider investing in airtight storage containers. By managing the environment, you can ensure that your green coffee remains fresh and ready for roasting for many months, allowing you to enjoy a variety of origins throughout the year.