there's no difference between a synthetic NPK and an organic NPK at the chemical level, after all they're both NPK right? the main difference is the size of the molecule chains meaning the synthetic stuff has smaller chains, smaller chains means easier absorbtion. If you think about it there are no labs "synthesizing" NPK , NPK comes from reverse osmosis water treatment plants that remove phosphates (like pee!) and nitrates (like shit!) from the water , it s a very cheap waste water chemical , "synthetetics" then process these and that's the only difference at all. Hope this helps ! 🚀