Around April, shortly after new shoots appear on the bushes, the fields are covered, almost completely protecting the plants from sunlight.
In Uji, reeds have been spread on bamboo canes for centuries. Today, only a few farmers still use this traditional method. The shade allows the tea to concentrate and multiply nutrients. Shrubs that are not exposed to sunlight increase chlorophyll production many times over.
Also important is L-Theanine, the amino acid responsible for the umami flavor in tea. Shade-grown tea preserves this delicate flavor.