Hey, I added some picture to my original "wheat grass test post." Check it out and tell me what you think, Particularly the root development in trays that I use mainly or only kelp tea.
From my experience so far, fertilizers makes a substantial difference in the resultant growth, even with something like wheat grass.
I can also attest that higher Brix % resulted in "stronger" juice, from the observed effects that my 9.5% brix grass did to me... yes I puked big time... lol and it wans't because of fungal growth. The 8% Brix juice had similar effects but not as strong. The 6.5% Brix juice even less strong.