As long as it's a complete nutrient formula, yes. I have not used it before though. When I feed an organic plant I make my own fertilizer (which you shouldn't have to do often if you're in an organic soil mix).
Have you done much research on organic vs synthetic. As far as the nutrients go, when an organic compound breaks down to it's simplest form (one that a plant can consume) it is the same chemical as those found in synthetic nutrients. The only thing is that, with synthetics, nothing has to break down for the nutrients to become available to the plant, they are already in their simplest form.