All sphagnum peat moss products EcoPeatMix are free of wood, sand, seeds, weeds, nematodes, living organisms, and various pathogenic inclusions. At the request of the customer, depending on the types of plants grown, the following may be changed: - Acid-alkaline balance (pH) - Ratio Nitrogen - Phosphorus - Potassium- Microelements Cu, B, Mn, Mo, Zn, Fe are added.