Any recommendations for additional nutrients? Neve...

Hello @Woodhercule! From nutrition perspective you are fine. You have your organic grow and bloom and a synthetic powerful pk booster ( that i think it's not necessary ). Your plants can grow just fine with only these products but if you want to be complete from building an ecosystem perspective you can add some other things. Aerated compost tea: it's full with beneficial microbes, carbohydrates from molasses which are energy source for the microbes, humic acids and micro nutrients from the compost. Enzymes: They brake organic matter like dead roots inside your substrate and give nutrients back. A decent product is cannazyme or you can make your own organic version from sprouts. Amino acids : When broken down by enzymes they release very little nitrogen and various organic molecules like hormones. A descent product is nirvana. All the above will not burn your plant as they don't have N-P-K value .As for the cal-mag you don't need it for now. Happy growing!