I use a mixture of promix HP and recycled soil that may be amended as needed. I retain two bins with 1 being far more of the veg leaning combination and one other getting much more amended for flower. In veg amendments provided are alfalfa, backyard garden sulfur, worm castings, https://chancejgzpo.blogpostie.com/55227042/the-definitive-guide-to-exotic-hemp-cultivars