Shade-growing
Definition
The practice of covering tea plants with shade structures (traditionally straw canopies, now often synthetic netting) for 2–4 weeks before harvest. Shading reduces photosynthesis, which increases chlorophyll and L-theanine while decreasing catechins, producing a sweeter, more umami-rich and less astringent leaf.
Why it matters
Shade-growing is the defining technique behind gyokuro, kabusecha, and the tencha leaves used for matcha. It's why these teas taste fundamentally different from sun-grown sencha - not just a subtle shift, but an entirely different flavor category. Shade duration and method are key quality markers for premium Japanese tea.