I don't believe it's OMRI listed, but rather, 'organic-based'. I'd actually consider PBP to be a fert that is closer to what we want something truly organic to be, like the fact that it's loaded with humates that prevent that salty residue crud from falling out of solution. Did you know that one of the neat things about humic acid is that it actually prevents chemical interactions in the bottle and in the soil? It's called a 'chelating' property from the Greek 'chelos' for 'claw'- it sort of surrounds the ion and makes it nonreactive to other ions in the solution, but still available to the plant. If I were running FF, I think I would also be running a humate product like Soil Syrup or Diamond NEctar (I think that is the Leonardite product? )
Anyway... back to the lab... ugh..