Black Owl Biochar, 1 cu foot bag. Biochar is used for:
Building healthy soil
Hosting beneficial microbes and fungi
Reducing acidity Improving tilth and aeration
Retaining nutrients
Water-holding capacity = 5-6x its weight, good in droughts
Saving on irrigation water
An application rate of 5%-10% is typical to maximize the utility of your potting mix/soil.  BOB’s particle size remains in the essential root area and won’t wash through the soil like other amendments. It is therefore, typically a one-time application.