Aoki Imported Bonsai tree soil blend is well-known and well-loved in Japan. The blend is Akadama, Fuji & Kiryu soils. All three are of volcanic origin.The grain in this Aoki mix is small (5mm) and is particularly suited to small trees and medium size bonsai.
This is our first year carrying Aoki mixes, so we have no personal experience with them, but we hear good things from other bonsai growers.
1 gallon bag, Small grain (5mm)