Similar to spices and coffee beans, dried tea leaves and powders will not “go bad” but can lose complexity of aroma and taste over time. Each category of tea has a unique level of oxidation and freshness window:
Green and White teas will lose their freshness most quickly. We recommend consuming these teas within 2 months from the time you first open the package.
Matcha powders should be enjoyed within 2 weeks upon opening because the powder will undergo “post-oxidation” when exposed to air, transforming its bright green color into a stale shade of pea-green or yellow. This can be minimized by using proper storage method.
We recommend using Oolong, Black and Botanical teas within 4 months of opening, for the best flavor.
Lastly, roasted Oolong and Pu’er teas have the unique ability to ripen and develop complexity with age over several years if stored properly.
Good rule of thumb: know the category of tea, order what you need, employ proper tea storage practices and enjoy your offerings!