This is what farmers refer to as “black gold”. There are no fillers here, only 100% pure earthworm castings certified for use in organic agriculture by Pro-Cert Organic Systems and OMRI listed. Earthworm castings are the ideal soil amendment giving microbial life back to the soil structure and, fertilizing boost. Earthworm castings are highly fungal and contain elements such as protozoa, amoebas and flagellates that contribute life to the microbes and improve the overall health of the soil and plant. Earthworm castings produce results that are simply far superior to those of conventional manners, compost, or other organic fertilizers. You will see definite differences in the yield, size, health, and colour of your vegetables, fruit, flowers, houseplants, lawns and more. 5 litre bag.