Traditionally processed oolong teas, such as Wuyi rock tea, Phoenix Dancong, and baked Tie Guan Yin, have good stability after roasting. They do not need to be stored in the refrigerator but can be kept in a cool, dry place instead.
Oolong teas are generally safe to store at room temperature since they are fully fermented, and this has little impact on their quality.
Dark teas, white teas, Pu'er teas, and aged teas, especially Pu'er, rely on aging for their drinking value. Storing these types of tea in the refrigerator could cause dampness issues and also reduce the activity of beneficial enzymes and bacteria within the tea. It is these enzymes and bacteria that contribute to the tea's flavor development over time. Refrigerating these teas would significantly affect their aging process.
These types of teas are best stored at room temperature in a dark, well-ventilated, dry area away from strong odors. Storing them in the refrigerator could lead to mold growth.
Should Green Tea Be Refrigerated?
Green tea is unique because it is meant to be enjoyed for its fresh and crisp taste. Typically, we only drink green tea from the first flush (before the Ming festival). The tea oxidizes quickly, so refrigeration is necessary. However, for Pu'er tea, all you need is normal, dry ventilation and a space free from other odors.
Why Do Some Teas Require Refrigeration?
The reason: Teas are sensitive to high temperatures. Higher temperatures accelerate the oxidation of polyphenols and other compounds within the tea. As temperatures rise, the tea ages more quickly, which can change the color and aroma, particularly for green teas, causing them to yellow and develop stale flavors. Generally, green teas and lightly fermented oolong teas require refrigeration, while Pu'er teas and post-fermented dark teas do not.
In terms of storage Containers, both metal cans and ceramic jars are suitable. Containers should not have been used for other purposes, especially not for food, before storing tea. The container must be airtight, light-proof, and non-permeable. When removing tea from the container, avoid using your hands directly; use a tea scoop instead. Do not store the tea Jar in the kitchen or any Damp area.
Additional Information:
Tea has a strong adsorption capacity and can absorb various odors. If stored near strong-smelling objects, the quality of the tea will be compromised. For this reason, when buying tea from a physical store, if the store is newly opened or recently renovated, proceed with caution. Choose another store to avoid purchasing tea that may have absorbed toxic substances or odors from renovation materials.
Packaged teas typically have a shelf life of 12-24 months, while loose leaf teas last about 18 months. Green teas generally last 18 months, while Tie Guan Yin can last longer. Black and dark teas have the longest shelf lives. It's important to emphasize that these shelf lives apply under proper storage conditions, and packaging should indicate that the tea needs to be stored in the dark and refrigerated.