Does Tea Go Bad? How to Store Loose Leaf Tea (By Type)

Dry tea rarely "goes bad" in the sense of becoming unsafe, but it does go stale. Kept airtight, dark, cool and away from smells, green and yellow tea stay at their best for about a year, light oolongs for about a year, red (black) tea for up to about three years, and roasted oolongs for years. White tea, pu-erh and dark tea can actually improve with age. The exception is moisture: tea that has got damp and grown mould should be thrown away. The four enemies of tea are moisture, strong smells, light and heat.

I'll be honest: my first "tea collection" lived in pretty clear glass jars on an open kitchen shelf, right next to the stove and the spice rack. It looked wonderful. Within a couple of months my Longjing tasted like hay, and a Tieguanyin had picked up an unmistakable hint of cumin. That was an expensive lesson in how tea actually keeps. Today everything lives in a dark cupboard in the hallway, far from the kitchen, and I've never had a repeat.

Does tea expire?#

Packaged tea has a best-before date, usually somewhere between under a year and three years, depending on the type. That date is about quality, not safety. Well-kept, dry tea past its date is usually safe; it just may have lost aroma and sweetness. Tea kept tightly packed in a dark, cool place can keep its quality for a couple of years or more, and the less oxidized and finer the leaf, the more vulnerable it is.

What changes as tea ages:

• Aroma fades first, especially the fresh floral and green notes.
• Colour dulls: light breaks down chlorophyll, and green tea turns yellowish.
• Taste goes flat, and green tea can turn dull and bitter. Measurably, the main green tea catechin drops by more than a quarter over six months of typical home storage.

The four enemies of tea#

How long each type lasts, and how to store it#

The fridge question#

The fridge helps delicate fresh teas, but it can also ruin them. Freezing damages the leaf, and the real danger is condensation: when cold tea meets warm air, moisture forms on the leaf.

If you use the fridge:

1. Only for green, yellow and light oolong. Never for roasted oolong, pu-erh, white or dark tea.
2. Divide the tea into small portions you'll drink in a week or two.
3. Seal each portion airtight.
4. Let a portion come to room temperature before opening it, so no condensation forms.
5. Never put an opened bag back in and out of the fridge repeatedly.

Unopened factory packs of green tea can go straight into the fridge.

The best containers#

• Porcelain caddies with a tight lid are close to ideal. A food-grade silicone seal in the lid is fine.
• Tins with a tight inner lid work well for most teas.
• Clay jars, baskets and wood suit pu-erh and dark tea, which need a little air. Avoid camphor wood: it gives its smell to the tea.
• Glass only if it lives in a dark cupboard.
• Plastic: no. It has its own smell, and tea picks it up.
• Original resealable foil bags are fine for fresh teas if you squeeze out the air.

Special cases#

White tea doesn't need to be drunk within a few months. Many white teas taste better after about six months of rest, and leafy white teas like Shou Mei can improve for years. See aged white tea.

Pu-erh is the opposite of green tea: it needs some air and stable humidity to age well, and it hates vacuum and strong smells. In a very dry apartment, the bigger risk is drying out. The full guide is how to store pu-erh, and the storage debate is in wet vs dry storage.

Dan Cong is a fresh tea at heart. Its famous aroma is best within about six months.

Roasted oolongs can be "rested" after purchase: a fresh roast can taste sharp, and a few months or even a year of rest softens it. See roasted vs green oolong.

How to tell if tea has gone bad#

One caution: some dark teas, like Fu brick, contain "golden flowers", yellow specks of a fungus that's deliberately grown during production. That's normal and expected. Fuzzy growth on an ordinary tea isn't.

My storage setup#

• A dark hallway cupboard, far from the kitchen, for oolong, red and white tea. Porcelain caddies and tins for what I'm drinking, original packs for the rest.
• Green tea in spring: small sealed portions in the fridge, one out at a time.
• Pu-erh and dark tea: a separate cabinet with cardboard boxes and a small hygrometer, away from everything else.
• A rule: I don't buy more green tea than I'll drink before the next spring.

Myths#

"Tea never goes off." Dry tea rarely becomes unsafe, but stale tea is real, and damp tea can mould.

"All tea should be vacuum-packed." Only light, fresh teas. Long-leaf roasted oolongs break, and pu-erh needs air.

"The freezer keeps tea forever." Freezing damages the leaf, and condensation does the rest.

"White tea must be drunk within months." It keeps well and can improve.

"Cloth bags in the fridge are fine." Tea absorbs moisture and smells through cloth.

My honest take#

Buy fresh teas in small amounts and drink them, rather than hoarding. Keep them in the dark and away from the kitchen. Save the long-term storage for the teas that reward it: white tea, pu-erh, dark tea and roasted oolong. Most "bad tea" I've tasted wasn't bad tea at all; it was good tea kept badly.

The bottom line#

Tea rarely spoils, but it goes stale: green, yellow and light oolong within about a year, red tea within about three, while roasted oolong, white tea, pu-erh and dark tea keep for years and can improve. Protect tea from moisture, smells, light and heat, use the fridge only for portioned fresh teas, and throw away anything musty or mouldy. For the whole family of teas, see my guide to the types of Chinese tea.

Read next: Caffeine in Chinese Tea and Green vs White vs Black Tea.