stuff that is a high reading. I used some blood and bone (6% nitrogen (N) and 6% phosphorous (P) under a hedge of mine alone with some horse poop. Last spring the hedge had good leaf growth (nitrogen) but few flowers. This spring the leaf growth is even better than last year whilst the blossom growth is several hundred times better. Thats the phosphorous doing its work and that is only at 6%. The horse poop helped a little as well though it is low in P, about 0.5%.
rob