Akadama is a product that is mined in Japan, air-dried, sifted, and bagged in different sizes. Akadama is often characterized as being either hard or soft. The brands we have are “hard” or “extra hard” akadamas. Like “soft” akadama, hard akadama breaks down over time but at a slower rate. Hard akadamas differ from fired akadamas as these don’t break down and have limited utility for bonsai. Some akadama brands flash heat the product before it is bagged. This flash heating has little, if any, effect on hardness.
Double Line (also known as Double Red Line) brand akadama is known as an “extra hard” akadama.
Bag size: 14 liters, 20.5′′ x 12.5′′ x 3′′ (approx. 22 lbs.)