All fertilizers are chemicals, gary. I would highly recommend you read The Colossal Hoax of Organic Agriculture; http://www.forbes.com/sites/henrymiller/2015/07/29/why-organic-agriculture-is-a-colossal-hoax/#2d8b5e2738e4                                                                                                  Miller only brings up a couple of the fraud of this industry. Most of our fertilizers come from deriving nitrogen from the air we breath, and phosphorus, potash is mined from the earth. It doesn't get any more natural and organic, gary. Furthermore, for almost 200 years now we have been mining huge deposits of bird-bat guano, that used to be dirt cheap until the agrichemical industry learned there are uneducated ignorant dolts who are willing to pay $20 for a product that used to sell for $2, because it has the word "organic" in it. you should study basic history of agriculture, not deluded propaganda from the church of the organic preying on the uneducated gullible