well, i did fertilize, though with a bit of a different feed than most here
i brewed bone meal/molasses tea. 1 tsp bone meal, 1/2 tsp molasses, 2 quarts water
a fair number of the commercial organic ferts out there do incorporate their phosphorus into their product with this method
i did use MG bone meal, 6-9-0, so it has a fair amount of nitrogen, some of it slow release