idk about ya'll but i think that OMRI certified does not mean that you dont use "non organic" but naturally occurring minerals.. all of the letters in a fert are minerals. and no way can a living being create a mineral. they digest it and die.. therefor if you fed a cow perlite and he shat it out it would be "organic"... nope i dont think so. my mother is an organic botanist and she has taught in more than one local collage. she told me i wasnt cheating using soil additives as long as i wasnt mixing straight chemicals into my soil... if it dont kill the bacteria in the soil its not bad... and btw i think but cant confirm yet but perlite has living organisms in it i believe.. and or develops them in the porous holes and therefor is much better then vermiculite for organic growing..
-J"Stoned