The growing medium is mainly recycled compost from the compost pile along with the augments of azomite and kelp.The compost tea was brewed by my sisters boyfriend I have yet to venture into the art of brewing compost tea.There is a company called tandjent enterprizes that have a biovam product and tea kits.This gets away from the way I want to grow which is more of a purist tradition.I use a basic grow tray a 11-21 inch tray 1.5 inches deep which is problomatic as far as root binding is concerned.After speaking with many master growers on the issue of brix I came to the conclusion its impractical for sprouting.I will continue to experiment with grass but sunflower greens is my new passion I have some new seed from nutsoline.com.Il post pics. once the weather starts to cooperate.Jeff