Worm castings are definitely the digested “soil” produced by worm farming or vermicomposting. They supply some macronutrients for leaf expansion; in this case, its NPK ratio is 1-0-0. But they also incorporate micronutrients and useful microbes, and boost drainage and soil structure. It may possibly originate from many different animals. https://www.facebook.com/bluedeebajfzc