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Growing conditions for tea (altitude, rainfall, drainage)

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Tea is agronomically fussy in a way that determined the whole geography of this story: it wants warm humid conditions, high and reliable rainfall, acid soil and — critically — sharp drainage, because the roots rot in standing water. That combination is found on hill slopes rather than plains, which is why the plant is native to the eastern Himalayan and Yunnan uplands and why the British sought hill land in Assam and the Darjeeling ridge rather than the Gangetic plain. Altitude also changes the product: slow growth at height concentrates aromatic compounds, which is the agronomic basis of Darjeeling's later premium. The constraint is why tea could not simply be grown wherever an empire wanted it.

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    Assembled narrative · 1

    Assembled from 11 blocks · 2 evidence · 7 related

    1. Story
    2. Tea is agronomically fussy in a way that determined the whole geography of this story: it wants warm humid conditions, high and reliable rainfall, acid soil and — critically — sharp drainage, because the roots rot in standing water. That combination is found on hill slopes rather than plains, which is why the plant is native to the eastern Himalayan and Yunnan uplands and why the British sought hill land in Assam and the Darjeeling ridge rather than the Gangetic plain. Altitude also changes the product: slow growth at height concentrates aromatic compounds, which is the agronomic basis of Darjeeling's later premium. The constraint is why tea could not simply be grown wherever an empire wanted it.
    3. Knowledge
    4. Growing conditions for tea (altitude, rainfall, drainage)
    5. Connections
    6. Camellia sinensis
    7. Darjeeling
    8. First tea planted at Darjeeling
    9. Evidence
    10. Kew's economic botany holdings document tea as an imperial commodity crop and the Wardian case as the technology that made live transcontinental plant transfer possible.
    11. Fortune's own published account documents his commission by the East India Company, his travel in disguise into closed tea districts, the use of Wardian cases, the recruitment of Chinese tea makers, and that green and black tea come from the same plant.
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