GreenGro Biologicals GreenGro Earthshine Biochar Blend, 250 lbThe Earthshine Biochar blend is a fast and easy way to boost the performance of new soil, reuse your old soil, and improve the effectiveness of compost teas and mycorrhizae products. This amazing product will save any gardener money by reducing soil costs, improving fertilizer use and reducing water use over the gardening season. Biochar and its use in amending soil is an age old Native American technique that has been around for over a thousand