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Kanuma Pumice

Produced in the Tochigi and Ibaraki areas, with particularly high quality soil yielded in the city of Kanuma, hence the name Kanuma soil. Its geological name is Kanuma pumice, and its primary components are silica and aluminum. It is acidic (pH 4 to 6), and mainly used for succulents, satsuki azalea and rhododendron bonsai.