Organic certified and organic chemical structures are completely different things. Organically certified gardens can only use non-synthetic products on their gardens. This does not necessarily mean safe though. Take nicotene as an example; it used to be a pesticide sold as 'nicotene sulfate'. It was taken off the market because of its toxicity to mammals--hope nobody smokes...Rotenone is from roots the several plants in the pea family. This is sold for organic gardening, but they don't tell you about the suspected carcinogens, and parkinson's connections. Also its toxic to fish. Although these are bad there are also synthetic organics, which means it contains carbon but it synthetically made; NOT FOR ORGANIC FARMING. These are sometimes even worse, like chlorinated hydrocarbons; which are very stable do not break down even in lifeforms. This builds up in the food chain and can be deadly. Worrying about these certifications is a complete waste of time, its all in the soil food web. If you are not harming your soil food web, and not spraying your plants with chemicals then you are growing what should be called 'organically certified'.
And to the person saying growing in pots isnt a long enough time to develop microbial populations...that is not so true. Look into aerated worm casting teas.