Kiryuzuna 3-6mm by Plant Culture PHKiryuzuna 3 6mm 500g (Soil Amendment) by Plant Culture PH Kiryuzuna, or Kiryu for short, is a clean earthy material that provides excellent drainage with its gritty texture. It's a mineral rich medium that doesn't break down easily during waterings. Unlike Akadama, they don't degrade into muddy soil. It provides a good visual clue if you need to water or not. #kiryuzuna #akadama #soil #bonsai #succulents #cactus #japan