I grow tomatoes in my back-yard, and don’t use fertilizer either because there is plenty of organic materials from my dogs who use the yard for their needs. I use water hose to spread it around so the microbes can break-down the stuff into organics and supply my garden of tomatoes with the nutrients needed. My friends say that my tomatoes are delicious, but I don't tell them how we grown them. My tomatoes are genuine organic.
I heard that commercially grown organic tomatoes are grown without fertilizer too. I never saw commercially grown organic fields with with lots of dogs let loose in the fields. I wonder if the workers and field hands let loose in the fields have any thing to do with how commercially organic tomatoes are grown since fertilizer isn’t used.