Category Archives: General Tea Background

Chagusaba: Sustainable Tea Production

Tea Garden in Chagusaba Region of Shizuoka Japan

Tea in Shizuoka, by Jose Comessu – CC-BY-3.0

Like many in the tea industry we are always interested in environmental trends or practices which impact the production of the camellia sinensis (tea) plant. While there is significant concern about global warming in many parts of the tea growing world, Japan included, the Japanese have become known for the practice of Chagusaba. This sustainable farming method protects the topsoil  and even enhances it while protecting tea plants from cold weather extremes. It also improves the overall taste and quality of Japanese green tea. This method, native to the Kakegawa region of the Shizuoka Prefecture, about 90 minutes by train from Tokyo has been in existence since the 1600’s and provides balance between the land and the farmers who produce some of the finest green tea in the world.

The Broad Strokes of Chagusaba Tea Production

Chagusaba is a farming method which originated in Shizuoka Prefecture nearby Mt. Fuji, whereby farmers grow native grasses for use in mulching between tea bushes. Specifically, these tall grasses, like the silver pampas grass, are grown alongside tea gardens. During the late fall and winter the grass is cut, dried, and spread between the rows of the tea bushes. The addition of this dried grass provides insulation for the root systems of the plants allowing protection and earlier growth in spring. As the season progresses the grass keeps the weeds down and slowly decomposes, adding nutrients and organic matter to the soil, improving its quality over time. Where fertilizer is used, the grass helps keep fertilizer in place and lessons the ability of rains to erode the topsoil. For all the added work work, tea farmers believe that the Chagusaba practice produces better color, taste, and aroma for their tea.

Globally Important Agricultural Heritage Systems (GIAHS)

Chagusaba farming practices make use of cut and dried pampas grass.

Silver Pampas Grass used in Chagusaba Farming, By 松岡明芳 – CC-BY-3.0

Japan has seen a significant reduction in its native grasslands over the past 100+ years. It’s estimated that today’s grasslands are 1/30th of what they once were. While the chagusaba practice enhances the soil and helps produce superior green tea for the Shizuoka region, the practice provides substantial added value to the environment. It encourages biodiversity by providing nourishment to the soil and supports growth of many other smaller plants. If not for chagusaba these smaller plants would be crowded out by larger plants that would otherwise take over if not for the annual harvesting of grasses. The environment created in chagusaba supports a significant number of rare plants including the “7 herbs of autumn” and numerous animals that live and find food from among the grasslands. Many of these plants are also important to Buddhist traditions and ceremonies. When the Shizuoka region proposed being designated as a Globally Important Agricultural Heritage System it stressed the impact of the farming practice on the environment, the economy, and the cultural practices of the region (Kawakatsu). In May 2013 The United Nations Food and Agriculture Organization officially designated the Chagusaba farming practice of Kakegawa in Shizuoka Prefecture as a GIAHS site.

As sustainable farming practices become increasingly desired both by farmers and by consumers we are interested in seeing where this practice, and those like it, may be copied and adapted in other parts of world. Closer to home the Chesapeake Bay has struggled for years with excessive nitrogen runoff from poor fertilization practices, excessive or inappropriate use of fertilizer on lawns, and overflow from waste water treatment facilities. Many great organizations are working to improve the water quality of the Chesapeake Bay starting hundreds of miles away in the headwaters which lead to the bay. Upstream the emphasis is on forest restoration with native trees and plants. Closer to the bay work is also being done to create buffers to absorb runoff and change destructive human behaviors. We would love to see increased sustainable farming practices take hold along with homeowner education and improved infrastructure to speed this restoration along. We would love to see increased forest buffers and native plants along the edge of the Chesapeake but we also we wonder if there may also be room for adapted chagusaba practices to aid in improved soil fertility and acting as both a buffer to the Chesapeake.

Sources Cited
Traditional Tea-Grass Integrated System: Shizuoka’s Chagusaba, A globally significant agricultural system and landscape, by Dr. Heita Kawakatsu, May 29, 2013, http://www.fao.org/fileadmin/templates/giahs_assets/Information_Resources_Annexes/Japan_Forum/Traditional_tea_Chagusaba_of_Shizuoka.pdf

GIAHS Propsal, Traditional Tea-Grass Integrated System in Shizuoka, http://www.fao.org/fileadmin/templates/giahs_assets/Sites_annexes/GIAHS-Shizuoka_proposal.pdf

Darjeeling Tea Estates in the News

Darjeeling, India

Darjeeling is in the Northeast of India surrounded by Nepal, Bhutan, and Bangladesh (Public Domain)

We’ve written about how much we love Darjeeling tea in the past. It’s a special region in India from which many distinctive teas originate. Its so distinctive that the European Union now recognizes Darjeeling tea with the mark of Geographic Identification. Unfortunately, the region also struggles with a system not far removed from the colonial plantation system of its recent past.

Recently, news has been surfacing in the west of abandoned plantations and worker starvation. This news isn’t entirely new. It’s been circulating for months in the Indian press but is becoming more widely known, thanks in part to an Associated Press article published in places like The Washington Post and CTV (Canada).

Struggling to Survive

In some Darjeeling district tea gardens like the Red Bank, Budapani, and Dheklapara tea estates, closures have resulted in growing numbers of people dying of starvation, malnutrition, and disease. There are quite a number of stories surfacing about absentee owners of tea plantations having closed up shop and left workers to suffer. Some of these workers are reported to have gone years without pay or regular meals while awaiting the outcome of the legal proceedings needed to reopen estates. In many cases there is a common theme where drought or mismanagement brought about financial hardship and the ensuing years of legal battles to reorganize leave tea garden workers in rural parts of West Bengal to suffer in limbo.

Darjeeling Tea is not from urban areas.

Urban Area of Darejeeling City, India by PP Yoonus, CC BY-SA-3.0

Darjeeling falls in the northern portion of the West Bengal state which borders Nepal, Bangladesh, and Bhutan. A 2012 report by KPMG notes that the state of West Bengal has one of the most densely populated regions in the country, a per capita income lower than the average Indian income, yet is a region experiencing rapid urbanization. The report also identifies a need for significant investment infrastructure, especially mass transportation in order to ensure adequate access to education and healthcare for the poor (KPMG). While those in urban areas are generally doing better, those in rural areas, where the tea farms are often located, face much greater challenges to diversify their opportunities for income and education in part due to lack of roads, markets, communications, and electricity (Khutan, Roy).

The ultimate cause may be a colonial era structure of plantations which needs to be remodeled. However, the near term cause is found in recent rainfall shortages sending businesses into bankruptcy and a legal system that ties up legal proceedings necessary to restart these plantations for many years (Reevell). Allegations of a local government in denial, a court system which can take years or decades to resolve disputes, very low wages, and lack of adequate education and infrastructure in rural areas means there are no easy answers to the situation.

Darjeeling in Perspective

It is worth bearing in mind that tea production in the Darjeeling region enjoyed substantial growth and investment during the British colonial era. Indeed, in the 1830’s one of the most pressing objectives of the Governor of India was to identify the right locations of soil and weather where tea could be grown in order to provide an alternative source from Chinese tea (Varma). Many large tea estates were developed during this time and although the labor practices may not have been perfect at that time, there was growth and investment by the owners of these estates.

While there is substantial opportunity for improvement in India, West Bengal, and Darjeeling, it is worth noting that the United States has a significant head start with the institutions, infrastructure, and laws necessary to improve the situation. India gained independence from the British in 1947 while the United States gained independence in 1776, having over 170 years more “experience” in the development of its laws and institutions. Likewise, the US Department of Labor which sets acceptable labor standards was signed into law March 4th, 1913 by President Taft, or nearly 35 years before India even became an independent nation.

Importance of Relationships in the Tea Business

Tea plucker in a Darjeeling tea garden.

Idyllic Picture of Darjeeling Tea Plantation, by DeviantArt user annanta, CC BY-SA-3.0

All this leads us to the importance of relationships in the tea business. If you delve a bit beyond flavored tea and the ongoing research about health benefits of tea, you find like any business, there are many great things and plenty of opportunities for improvement. Driving improvements in the industry means getting involved; getting to know suppliers, asking questions, understanding that the industry isn’t perfect, and pushing for change. Driving change by being informed, forming strong relationships and making buying decisions that demonstrate what you value in the whole tea product.

There are plenty of responsible plantations in Darjeeling and throughout the tea industry. Being informed and passionate about the industry leads to asking questions, building relationships, and ultimately partnering for change and improvements.

 

Sources Cited

Darjeeling tea estates closures mean hunger, death for abandoned workers, by Patrick Reevell, September 29, 2014, The Associated Press, http://www.ctvnews.ca/business/darjeeling-tea-estates-closures-mean-hunger-death-for-abandoned-workers-1.2029167

Importance of Urban and Social Infrastructure in Economic Growth of Bengal, 2012, by KPMG, http://www.kpmg.com/IN/en/IssuesAndInsights/ArticlesPublications/Documents/Importance-economic-growth-Bengal.pdf

Producing Tea Coolies?: Work, Life and Protest in the Colonial Tea PLantations of Assam, 1830s – 1920s, Nitin Varma, http://edoc.hu-berlin.de/dissertationen/varma-nitin-2011-12-01/PDF/varma.pdf

http://www.washingtonpost.com/world/asia_pacific/death-hunger-stalk-indian-tea-estate-workers/2014/09/29/75dda230-47a7-11e4-a4bf-794ab74e90f0_story.html

Rural Livelihood Diversification in West Bengal: Determinants and Constraints, by Dilruba Khatun and B.C. Roy, Agricultural Economics Research Review, Vol. 25(No.1) January-June 2012 pp 115-124, http://ageconsearch.umn.edu/bitstream/126049/2/12-Dilrub.pdf

A new DAWN rises in Darjeeling to save starving tea garden workers, by Ashim Sunam, Darjeeling Times, http://darjeelingtimes.com/a-new-dawn-rises-in-darjeeling-to-save-starving-tea-garden-workers/

Your Caffeine Assumptions About Tea Are Wrong! (Sorry)

Two leaves and a bud of camellia sinensis (tea) plant contain the most caffeine of any part of the plant.

Bud and Two Leaf – Desired Pluck and Highest in Caffeine – By Mandeep Singh, CC-BY-SA-3.0

We recently wrote about the caffeine in tea, specifically looking into claims that caffeine in tea was somehow different than caffeine found in coffee, soda, or other products. We found that the jury was still out on the topic, with some studies showing that the combination of L-theanine and caffeine was less jolting. However, these studies used much greater quantities of L-theanine than is normally found in tea. This brings us to the next topic around how much caffeine is in tea. A search of web pages reveals a wide variety of information with many charts showing black tea as having the most caffeine followed by oolong, green, and white in descending order. We went searching to learn more about what things impact the amount of caffeine in tea and what ends up in your cup.

The Role of Caffeine in Tea

First lets set the stage a bit. Caffeine is found in true tea from the camellia sinensis plant. It is not found in herbals and tisanes like products featuring rooibos, honeybush, or other herbs. Many plants including both coffee and tea naturally produce caffeine as a way to protect themselves. Caffeine, like other compounds including nicotine and morphine, is a bitter tasting alkeloid, a feature which helps ward off many insects that would otherwise feast on plant leaves. It also tends to inhibit the growth of fungus thereby further protecting the plant. (Freeman and Beattie)

Recent research also suggests that there may also be another reason for caffeine in plants; to attract honeybees. Specifically, researchers have suggested that in low doses, having caffeine in pollen helps honeybees better identify the scent of a given flower providing a bit of reproductive advantage. (Wright, Baker, et all).

Caffeine and Types of Tea

Understanding that the presence of caffeine in tea is a self defense mechanism and that new growth is most vulnerable to insect attack, it should come as no surprise that the most desired part of the tea plant also has the highest caffeine. Specifically the bud and newest leaves, which are highly regarded for many types of tea, provide more caffeine than older growth. However, this isn’t the end of the story. The tea plant, c. Sinensis has evolved naturally over time into many varieties to suit the area in which they are grown. The sinensis and assamica varieties are the most notable but not the only varieties. Additionally, many countries including Japan, China, India, and Kenya actively work on producing specialized clones more suited to specific growing conditions, desired tastes, and leaf appearance. Each variety of plant differs in the amount of caffeine it produces and even the specific season of growth and available nutrients all impact caffeine production.

All types of tea, including green, black, white, and oolong, come from the same plant. The drying, rolling, and oxidization to achieve finished product does vary from type to type but the varieties still come from the same basic plant. Nothing in the standard production process extracts or otherwise removes caffeine from the leaves.

So what does this mean? Unless producers and retailers are sampling large volumes of leaf, for each and every product they offer, its really impossible to make specific claims about the amount of caffeine in any type of tea. It will fluctuate wildly within a very wide range; white, black, green, or otherwise. One might be able to avoid high amounts of caffeine by avoiding teas that are all tips but even this is no guarantee.

Decaffeinated Tea

An alternative for many is to look for decaffeinated tea which theoretically allows enjoyment of tea without the caffeine. There are two general methods used in the decaffeination process of tea today; ethyl acetate (also known as “naturally decaffeinated”) and CO2. In the first case, ethyl acetate, which occurs naturally in the tea plant, is used to wash the tea leaves removing caffeine (as well as many other beneficial substances and flavor compounds) from the product. The washed tea leaves are then dried and repackaged. In the case of CO2, the leaves are also washed. This is done under more than 60 lbs of pressure per square inch (psi) at which point CO2 becomes a liquid. After washing the tea in liquid CO2 the leaves return to normal pressure at which point the remaining liquid CO2 simply evaporates. Both decaffeination processes are expensive, time consuming, and remove more than just the caffeine resulting in some compromise in taste and other compunds found in tea.

Aside from the impact on taste and other compounds, the process of decaffeination does remove most of the caffeine found in tea. If you live in the European Union and you buy decaf tea then you are in great shape. To meet EU standards a decaf product must have 99.9% of the caffeine removed. In the United States we aren’t quite as exacting, requiring only 97% removal. So if we assume that the amount of caffeine in any given tea sample may vary widely then so too might the amount of caffeine in your decaf tea.

Rooibos, Honeybush, and Tisanes naturally are caffeine free.

Adirondack Berries – A Rooibos Based Tisane

Its worth noting that there is a myth floating about that you can eliminate most of the caffeine in tea by doing a quick initial steep, tossing the liquor, and re-steeping. Unfortunately the data under controlled conditions doesn’t support this myth at all. To eliminate the caffeine you would need to steep for 10-15 minutes, toss the liquor, and then steep again but who would want to drink that? For a much more in-depth look at caffeine and tea have a look at Caffeine and Tea:  Myth and Reality by Nigel Melican which is one of the best reviews we have seen to date on the subject.

In summary, while the amount of caffeine in any given sample can be measured by a lab, as far as we can tell its really impossible to make sweeping claims about the amount of caffeine in any specific type of tea, much less one specific tea product. When we want to skip the caffeine we’ll have a a tisane or herbal tea.

Sources Cited

Freeman, B.C. and G.A. Beattie. 2008. An Overview of Plant Defenses against Pathogens and Herbivores. The Plant Health Instructor. DOI: 10.1094/PHI-I-2008-0226-01, http://www.apsnet.org/edcenter/intropp/topics/Pages/OverviewOfPlantDiseases.aspx

G.A. Wright, D.D. Baker, M.J.Palmer, J.A. Mustard, E. F. Power, A. M Borland, P.C. Stevenson. Caffeine in floral nectar enhances a pollinator’s memory of reward. Science. Doi 10.1126. Science., http://www.ncl.ac.uk/press.office/press.release/item/bees-get-a-buzz-from-caffeine

Is caffeine from tea less jolting?

Caffeine Chemical Makeup

Chemical Makeup of Caffeine

We love tea as much as the next person (okay perhaps a bit more). We are also a bit geeky by nature so we are fascinated to learn more about tannins, polyphenols, terrior, and other science related topics in the world of tea. We have also learned to be a bit skeptical as well. There are loads of claims attributed to tea being able to cure all kinds of health problems. There seems to be no end to the claims made around tea and tisanes. Most of these claims, however, utterly lack quality sources and rigorous scientific inquiry.

So it is with one of the more fascinating claims we have come across; that the caffeine in tea is somehow different or better than that found in coffee. Specifically, there are quite a number of websites claiming that the caffeine in tea is either “slow release” or is absorbed into the bloodstream more slowly. As the theory goes, this property makes tea a better choice because it doesn’t have the significant quick jolt found in coffee. What’s more the theory suggests that the caffeine stays with you longer, providing an enhanced sense of alertness and clarity.

How Caffeine is Generally Accepted to Impact the Body

It turns out that caffeine causes quite a number of reactions inside the body stemming largely from the brain. Specifically, as the body gets tired it is believed that adenosine molecules builds up in the brain where they attache to aptly named adenosine receptors. This in-turn causes you to feel drowsy and triggers sleep. It turns out that caffeine fits nicely into those adenosine receptors where the brain happily doesn’t get the message that it should be tired. In a cascading effect, it is believed that neurons in the brain begin firing because of the blocked adenosine receptors, the body begins to think its under attack, and the pituitary gland starts releasing adrenaline and the body goes into fight or flight mode, ready for anything.

Caffeine in Tea is Somehow Different

Tea Leaves in Gaiwan

Steeping Tea Leaves by Wikimol, CC BY-SA-3.0

All this leads us back to the earlier theory about how the caffeine in tea is somehow different from caffeine found in coffee, soda, or myriad other products. Realistically, caffeine is caffeine is caffeine.  It’s all the same molecule, whether it’s coming from tea, coffee, chocolate, medicine, or so-called energy drinks. What is fascinating, however, is how the body behaves when caffeine is ingested with other substances. While tea has long been believed to deliver a less jolting caffeine effect science hadn’t been able to explain it (and really still hasn’t).

There have recently been a few studies which look at caffeine in combination with compounds present in tea that appear to shed light on the subject. In particular, research has been looking at L-theanine, an amino acid found primarily in plants and fungus materials in combination with caffeine. Tea, as should be obvious at this point, contains L-theanine. Researchers in two different studies (referenced below) have found some linkages in the combination of the two compounds to favorable alertness, cognitive performance, blood pressure, and heart rate. The kicker, however, is that the study participants were given 40-50 mg of caffeine and 90-100 mg of L-theanine.

According to research by Dr. Emma Keenan at the University of Bristol (UK), a standard cup of black tea, quoted as 200 ml or a bit over 6 oz, has 24.2 +/- 5.7 mg of L-theanine. This is one quarter the amount given to study participants when looking at the combination of both caffeine and L-theanine.  For green tea this was even lower at 7.9 +/- 3.8 mg of L-theanine. Even if you double the amount of tea consumed to a (perhaps) more reasonable 400 ml or 12-13 oz, the amount of L-theanine is still about half the amount used in study.

For its part caffeine varies wildly in a cup of tea ranging loosely between 30 and 120 mg of caffeine (we will be doing another blog soon which may further challenge assumptions about caffeine in tea).

So is Caffeine in Tea Different?

From our vantage the caffeine in tea isn’t different at all.  Its still caffeine.  What may be different is how the body responds to the combination of tea, L-theanine, and other compounds present in tea. There is promising research to suggest that L-theanine in combination with caffeine may boost alertness and cognitive response but we wouldn’t feel comfortable making that claim without more research and realistic dosages that mimic real-world consumption of tea.

Sources Cited

The combination of L-theanine and caffeine improves cognitive performance and increases subjective alertness, by Giesbrecht T, Rycroft JA, Rowson MJ, De Bruin EA, http://www.ncbi.nlm.nih.gov/pubmed/21040626

The combined effects of L-theanine and caffeine on cognitive performance and mood, by Owen GN, Parnell H, De Bruin EA, Rycroft JA, http://www.ncbi.nlm.nih.gov/pubmed/18681988

How much theanine in a cup of tea? Effects of tea type and method of preparation’, by Keenan, E, Finnie, M, Jones, P, Rogers, P & Priestley, C 2011, Food Chemistry, vol 125., pp. 588 – 594, http://www.bristol.ac.uk/expsych/people/emma-k-keenan/pub/2957550

What is Quality Tea?

For many, tea bags are considered to be low quality, and they are often avoided by tea drinkers who have discovered loose leaf tea.  For those of us who prefer loose leaf tea, there are plenty of valid reasons why they are our teas of choice.  They offer greater appreciation for the product consumed, better understanding of where it comes from, and appreciation of the sheer beauty of the loose leaf.  But what really makes loose leaf tea “high quality tea” and to whom?  There are many different views on quality tea that are worth exploring.  Ultimately, for the blender “quality tea” is more a discussion of appropriate fitness for the intended product.  For consumers it comes down to what you want from your tea experience and how adventurous you want to be (i.e. drink what you like).

Quality Tea Flavor

Star anise may be an ingredient in quality tea blends.

Star Anise by Flickr User Arria Belli CC BY SA 2.0

There are any number of flavors that can be ascribed to tea.  A single estate or blended tea may have malty, grassy, fruity, or other tastes associated with it.  In order to appeal to a broader set of customers, producers and sellers often reach for additional ingredients.  Candied fruits, herbs, spices, roots, dried berries and many other additions can create interesting teas.  Some of the ingredients complement the base tea, some overpower the flavor of the base tea, and still others have no tea at all and are simply herbals or tisanes.  When the standard fruits, nuts, berries, and other additions don’t quite provide enough flavor or aroma for the producer or blender they reach for natural and artificial flavors.  These additions provide extra concentrated flavor for which a little goes a long way.  For some consumers the measure of quality tea will be lack of additional “flavors”, for others it will be the size and quantity of additional ingredients, and for still others it will be the balance of flavors which allow the base tea flavor to come through.

Whole Leaf or Broken Leaf Tea

Fullness of the leaf or leaf size can be a measure of quality tea for some.  Tea leaf size ranging from extremely small particles, called dust and fannings, all the way up to full leaf (the likes of FOP, OP, TGFOP, etc).  While some tea drinkers prefer only whole or nearly whole leaf, the measure of quality tea along leaf size is really focused on two areas for producers; consistency in size and properties that come from a specific leaf size.

Quality tea blends won't separate into layers.

Tea, like liquids of different densities, will separate.

Consistency of leaf size is important due to surface area exposed to water.  Lack of consistent size of the leaf during the infusion process means flavor and color is extracted from the leaves at different rates.  While the infusion of smaller particles may be well past its prime, larger leaf may yet to fully infuse and release its flavor, anti-oxidants, and other properties.  With black tea, over-steeping the smaller particles is less of a problem.  However, with green tea, over-steeping leads to bitterness that many dislike.  So it’s important, especially with green teas, to have consistent leaf size.  Tea bags are primarily to satisfy convenience requirements, chief among them is fast brewing time.  Dust and fannings require only seconds to brew making the right size (small) a point of quality for tea bag manufacturers.

Specific leaf size is very important to blenders.  As one attempts to make a blend that works for consumers, the specific leaf size becomes important in relation to other ingredients.  Size and weight greatly impacts how the dry product settles in bags and tins.  Having the wrong leaf size for a given blend means that the ingredients settle out with heavier ingredients sinking to the bottom and lighter floating on the surface.  Think of the school science project with oil and water where the two separate out.  With tea, if the finished product separates into layers the flavor, ultimately, is not what is expected by the consumer and would dramatically change as different portions of the batch is consumed.

Single Estate and Authenticity in Quality Tea Production

There is a growing awareness and appreciation in the United States for unique, artisan tea production.  In particular, an increasing number of consumers are looking for a connoisseur experience when purchasing tea.  Single Estate Teas generally eliminates the blending and flavoring, providing the connoisseur the opportunity to experience and appreciate a single tea, from a very specific corner of the globe, and realize the differences between batches and production years.  Similarly, connoisseurs are often seeking authenticity in production.  Meaning they prefer an authentic Dragonwell or Bai Hao Silver needle vs attempts by producers in different provinces or even entirely different countries to sell knock-offs at artificially high prices.  In this case the measure of quality tea, for some consumers, comes from the amount of knowledge available about the producing estate or how closely the product tracks to established norms of production style and production region.

Less Subjective Quality Issues in Tea

While the other tea quality measures discussed thus far are really more in the eye of the beholder, there are certainly objective quality issues with tea from time to time.  Specifically, production and storage problems.  During production there are any number of issues that can impact the quality of tea.  For example, tea can be picked at the wrong pluck standard for a given style, it can be left out to wither too long (or not long enough), during firing it could be left with too much moisture causing mold and mildew problems.  On the other end of the spectrum, tea can be stored improperly causing off flavors.  Since tea is hygroscopic, it readily absorbs moisture from the air as well as odors.  Storing a tea open to the air, even for a few hours with something as strong as mint nearby, can easily ruin the taste and aroma of an otherwise great tea.

Quality Tea is Subjective:  Do You Want a Conventional, Adventurous, or Connoisseur Tea Experience?

Infused Bai Hao Silver Needle Leaf

Bai Hao Silver Needle Full Leaf

In the end, quality tea is very much situational and subjective.  Try to tell a producer of fannings and dust that it’s not a high quality tea product and a heated discussion will very likely ensue.  So trying to identify “quality tea” is really a misnomer.  Instead it’s far more important to identify what you want in your tea experience.  If you want something quick with a consistent taste and aren’t interested in the back-story then teabags will likely suffice.  Perhaps you want a conventional tea experience with a bit more variety and understanding about the tea you are consuming.  You may be a bit more adventurous and interested in getting to know more single origin teas or the individual teas that make up your favorite blends.  Or are you looking for the connoisseur experience; appreciating individual growing regions, estates, or specialty styles.  Each experience has its own marks of “quality” or the standards to which they are held and from our perspective it’s more important to explore the different nuances to different styles of tea than it is to adhere to somewhat arbitrary definitions of quality tea.