biochar part 1. making the comfrey tea to charge the charcoal. Published 1 year ago • 694 plays • Length 16:00 Download video MP4 Download video MP3 Similar videos 8:59 how to make comfrey tea for biochar at the next level. 8:39 biochar part 2. testing the comfrey tea fertiliser. 11:09 biochar part 3. inoculating (charging) the charcoal.
