Green tea grows in tropical and subtropical regions across Asia, with China producing roughly 75% of the world’s supply. The tea plant thrives between latitudes 41°N and 16°S, in areas with acidic soil, high humidity, and at least 50 inches of annual rainfall. While China and Japan dominate production, green tea is also cultivated in Vietnam, Indonesia, South Korea, India, and parts of Africa and South America.
The Plant Behind Green Tea
All green tea comes from the same species, Camellia sinensis, but two main varieties exist. The China type has small leaves and is the variety most commonly used for green tea. It’s cold-hardy, produces intense green tea flavor, and grows throughout China, Japan, and other parts of East and Southeast Asia. The Assam type has much larger leaves and is more commonly used for black tea in India and other hot climates. A third, less common variety with intermediate leaf size grows in parts of Southeast Asia.
What makes green tea “green” isn’t the plant itself but how the leaves are processed after picking. The leaves are quickly heated to stop oxidation, preserving their color and delicate flavor. The same plant, processed differently, becomes black tea, oolong, or white tea.
Climate and Soil Requirements
Tea plants need warmth, moisture, and acidic ground. Summer temperatures between 70°F and 84°F are ideal, with relative humidity staying between 75% and 85%. Annual rainfall of 59 to 98 inches keeps the plants well-watered without irrigation, though many commercial farms supplement during dry spells.
Soil pH is one of the most critical factors. Tea plants grow best in acidic soil with a pH between 4.5 and 5.5, which is more acidic than what most garden vegetables prefer. The soil’s nitrogen, phosphorus, and potassium content directly affects both yield and flavor. Nitrogen and phosphorus drive the production of amino acids and chlorophyll, the compounds that give green tea its characteristic taste and color. Potassium strengthens the plant’s root system and helps it resist stress. Even trace minerals like calcium, iron, and sulfur influence the final flavor profile, with soil composition affecting both aroma and taste in measurable ways.
Elevation matters too. Some of the most prized teas in the world grow at high altitudes, where cooler temperatures slow leaf growth and concentrate flavor compounds. Darjeeling tea, for example, grows in the Himalayan foothills at elevations up to 2,200 meters (about 7,200 feet).
China: The Birthplace and Largest Producer
China produces around 480,000 tons of green tea annually, accounting for about three-quarters of global output. Yunnan province in southwestern China is considered the original home of the tea plant, but today the most important green tea regions lie south of the Yangtze River, spanning the provinces of Zhejiang, Anhui, Jiangsu, Jiangxi, Hunan, and Hubei.
Zhejiang is the heart of Chinese green tea production. Its provincial capital, Hangzhou, is famous for Lung Ching (Dragon Well), widely considered the finest Chinese green tea. Anhui province is home to the Huang Shan mountain region, which produces two celebrated green teas: Huang Shan Mao Feng and Tai Ping Hou Kui. In Jiangsu province, the city of Suzhou produces Pi Lo Chun (Jade Green Snail of Spring), a tea nearly as renowned as Dragon Well.
The most prized Chinese green teas come from the spring harvest between March and May. Leaves picked before the Qingming festival on April 5th, known as “Pre-Qingming” tea, command the highest prices because the young buds are tender and packed with flavor.
Japan: 100% Green Tea
Japan is unique among tea-producing nations: virtually all of its 83,000 tons of annual tea production is green tea. Two prefectures dominate. Shizuoka, nestled between Mount Fuji and the Pacific coast west of Tokyo, produces about 40% of Japan’s tea. Kagoshima, on the southern island of Kyushu, produces over 30%. Other notable regions include Mie in central Japan and the ancient capitals of Kyoto and Nara, where tea cultivation is deeply intertwined with Buddhist tradition.
Japan’s first harvest, called ichibancha, runs from late April to early June and produces the most prized leaves of the year. Sencha made from this first picking is sold as shincha, or “new tea,” and is eagerly anticipated each spring.
One distinctive Japanese technique is shade growing. For premium teas like matcha and gyokuro, farmers cover the tea plants with screens that block 85% to 98% of sunlight for about three weeks before harvest. Tea plants originally evolved in tropical forests under a canopy of trees, so shading mimics their natural environment. The reduced light forces the leaves to produce more chlorophyll and amino acids, creating a sweeter, more complex flavor and a deeper green color.
Vietnam, Indonesia, and Other Producers
Vietnam produces around 31,000 tons of green tea, making it the fourth-largest green tea producer globally. Green tea is the most popular variety among Vietnamese tea drinkers, and the country has a distinctive tradition of lotus tea, made by sealing green tea leaves inside a lotus flower overnight so they absorb the fragrance.
Indonesia contributes roughly 6% of global green tea production, drawing on about 38,000 tons from its total tea output. The country’s tropical climate and volcanic soils provide favorable growing conditions, particularly on the islands of Java and Sumatra.
India, despite being one of the world’s largest tea producers overall at around 648,000 tons, dedicates only about 1% of that to green tea. Most Indian tea production focuses on black tea, particularly from Assam and Darjeeling. South Korea also produces green tea on a smaller scale, with its earliest and most prized picking, called woojeon, harvested before April 20th using only the bud.
Beyond Asia, tea cultivation has spread to parts of Africa, including Kenya, Uganda, and Malawi, as well as pockets of South America, Australia, and even Europe. In the United States, tea plants can grow in USDA Hardiness zones 7 through 10, and small-scale operations exist in states like South Carolina, Hawaii, and Washington.
Why Location Shapes the Flavor
The same tea plant grown in Zhejiang, Shizuoka, and Kagoshima will produce noticeably different teas. Soil mineral content, elevation, temperature swings, rainfall patterns, and sunlight exposure all influence the chemical makeup of the leaves. Higher altitudes generally produce more nuanced, aromatic teas. Regions with greater temperature variation between day and night tend to yield leaves with more concentrated flavor compounds.
This is why origin matters so much in the tea world. A Dragon Well from Hangzhou tastes nothing like a sencha from Shizuoka, even though both are green teas from the same species. The combination of local climate, soil chemistry, elevation, and traditional growing techniques creates flavor profiles as distinct as wines from different vineyards.