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Teas are made from the tea plant (Camellia sinensis) or one of its varietals, cultivars, or clonals. Green tea is made from leaves harvested from this plant that have undergone a certain style of processing afterwards. There is a wide variety of resulting green teas, due in part to variations in that processing and in part due to terroir (location where grown, including elevation, and time of year when harvested). Green tea is sometimes referred to as a unoxidized tea, that is one where the leaves have not undergone oxidation (the natural chemical process that occurs right after harvest).
Tea leaves are harvested either by hand or machine, the choice being determined largely by the version of green tea being produced. Teas such as Huang Mountain (Huangshan) Mao Feng from Anhui Province is made from young leaves at the tips of the branches harvested when those leaves are at a very young stage with only a bud and a single unfolding leaf. On the other hand Gunpowder is made from leaves that have been on the plant longer and have fully opened before harvesting.
Green Teas are generally harvested three times per year: late April to early May, June through July, and late July to early August. Sometimes, there will also be a fourth harvest. The leaves harvested in the spring are the best quality, with higher prices to match.
Green Teas undergo a multi-step process of steaming, pan-firing, and/or rolling before being dried to halt the oxidation process. Little oxidation occurs in most green teas, and the liquor is typically a green or yellow color, and flavors range from grassy to sweet with mild astringency.
Processed green teas (“aracha”) are stored unrefined under low humidity refrigeration in 30 or 60 kg paper bags at 0-5°C (32-41°F). They undergo a final firing before they are blended, the best leaves selected, and then packaged.
The leaves in this state will be re-fired throughout the year as they are needed, giving the green teas a longer shelf life and better flavor. The first flush tea of May will readily store in this fashion until the next year's harvest. After this re-drying process, each crude tea will be sifted and graded according to size. Finally, each lot will be blended according to the blend order by the tasters and packed for sale.
To steep a green tea at its best use about two grams of tea leaves per 100ml of water (about one teaspoon of green tea per five ounce cup). With very high-quality teas like gyokuro, use more leaves and steep multiple times for short durations.
Green teas are generally infused in cooler temperatures (below boiling), varying with each tea.
Infusing green tea too hot or too long is likely to result in a bitter, astringent brew, regardless of the initial quality, possibly due to a release of the tannin chemical which tends to be in a higher quantity in these teas. Warm the teapot beforehand to keep the tea warmer while it’s infusing. Keep the tea leaves in the gaiwan, cup, or teapot between infusions.
Chinese green teas are grown in several provinces:
Leaves of Chinese green tea should appear even and unbroken, with good color, and slightly shiny with their natural oil. The dry leaf should have a noticeable fragrance. The brewed liquor of most good quality green teas maintains a vibrant color with good clarity. Quality green tea is often determined by the leaf configuration of the plucked tea. One bud, one bud and one leaf, or one bud and two leaves are usual leaf configurations of good quality green tea. The leaves when brew should look exactly as the did when plucked. The color of the dry green tea can range from a light green to yellowish green for green tea that is primarily fried, to a dark green for green tea that is primarily baked.
Over the past two decades, green tea has emerged from obscurity in the western market. This trend, fueled by western studies into the health benefits of green tea has spurred a demand for better quality leaf.
While research is ongoing, there have been signs that drinking a freshly steeped cup of green tea per day is certainly helpful (but definitely not a cure-all). Longjing is often considered the healthiest green tea, being made from tender shoots with the highest levels of beneficial EGCG and ECG which decreases as they mature on the plant. However, generally speaking, delicate, sweet-tasting young tea shoots harvested in early Spring make the best green tea. And many have these same quality markers. A great plus for their wonderful flavors.
See full blog article.
See also 5 Things to Know About GABA Tea.
Loose leaf is strongly recommended. As fresh as possible. Don’t oversteep (to avoid getting a bitterness to the tea flavor). That’s why we sell premium loose leaf green teas
A comparison by the USDA in 2007 of flavonoid content in almost 400 different kinds of green teas found that a cup of hot, regular (non-decaffeinated) green tea is the healthiest. A mere 100 milliliters (approx. 3.4 fluid ounces) of green tea contains 127 milligrams of catechins – twice the amount in decaffeinated green tea, three times more than in a flavored green tea, and ten times more than an instant or bottled green tea.
On average, a cup of green tea will have roughly 100 mg of EGCG per 8 ounces, but this will vary by brand, region grown, steeping time, age of the leaves, and so on.
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