I have never used any kind of fertilizer, I certainly wouldn't use anything but organic. I have to be honest and was hesitant in believing that your product was 100% organic, but decided that I would trust and purchased anyway, the results would be the next thing to look for. Boy oh boy!!!!!, was I happy I took the chance, my garden is thriving and looking plentiful!! I am convinced of the trust I have placed in your product. So happy !!!