Carbon Gold describe this blend as an 'organic substrate rejuvenator' that will bring 'an intense boost of all the trace minerals and natural biology (fungi and bacteria) your plants' .
This blend also includes a mixture of mycorrhizal and trichoderma fungi, wormcasts and seaweed on top of the biochar base. All of these are vital for healthy roots and healthy roots mean strong plants.
That's probably why this is why the biology blend is Carbon Gold's best seller to professional growers.
Soil Association Approved for use in organic growing.
1L of soil only needs 1 tablespoon.