This produc uses  vermicompost, biological organic fertilizer, clean sand and vermiculiteand they are compounded in a certain proportion, our product contains a variety of  comprehensive mineral nutrition especially the amino acid chelated trace elements and loose ventilation.The water preserving fertility is strong, and can provide a healthy environment for the growth of plant roots. This product is the pure products of the original plants, and we did not add any chemicals or manure fertilizer.It is clean and has no smell, athogens or weed seeds.