Biochar is a carbon rich soil amendment that doesn't readily decompose.
Amazonian peoples use charcoal as a key ingredient in their terra preta soils and today it is a staple component in nearly every substate mix used in the aroid, terrarium and vivarium hobbies.
Used as 1 in a 10 part substrate mix, charcoal can help to stem mould and its open capillary structure acts as a conduit for water, air and nutrients.
Biochar aids:
- Water retention
- Nutrient supply to roots
- Decrease runoff of nutrients
- Support microbes and mycorrhizal fungi
Graded to 0-8mm (mostly 1-3mm fines).