Welcome to the forum, their is tons of cool stuff that is being gleaned from great minds everyday. As far as growing medium and beneficial mycorrhizal inoculants you have to get a hold of these guys at Genesis Soils.
They have helped me and sooo many others to perfect their growing conditions and quality. They have this earthworm casting organic compost with their mycorrhizae that is the best I have experienced in my 35 years growing.
Gotta check it out.
Talk soon,
Rooty.