Charcoal
From BonsaiWIKI
Horticultural charcoal is a porous carbon, used as a natural filter to help absorb impurities that could be toxic to roots and to improve soil drainage
Typical application rates vary. The manufacturer recommendation is around 1 tablespoonful in the average size bonsai pot
| Bonsai Soil Components |
| Inorganics: Shale | Sand | Haydite | Turface | Ceramis | Oil-Dri | Decomposed Granite | Kitty litter |
| Volcanic: Pumice | Perlite | Vermiculite | Lava |
| Japanese Soils: Kanuma | Akadama | Hyuga |
| Organics: Fir bark | Redwood bark | Peat Moss | Coir | Muck | Charcoal | Compost | Field soil | Potting soil |
