noun
akadama; red soil aggregate; volcanic ash soil for bonsai
A granular, clay-like volcanic ash soil used primarily in bonsai and other container gardening for its drainage and aeration properties.
盆栽の土には赤玉土がよく使われる。
Akadama is often used as soil for bonsai.
赤玉土は水はけが良いの
Because akadama drains well, it is also suitable for succulents.