This preparation is used for spraying on the soil, usually with horn manure (500). It encourages beneficial fungi to proliferate in the soil and grow large and long hyphae. This supports the distribution of nutrients through the soil for plant root uptake. Use on its own or with afternoon soil sprays. Instructions are included. Please note: Equisetum sp. plants and seeds are declared noxious weeds in Australia. The dried Equisetum we sell is imported with AQIS approval. The 5ml vial does up to 25ha.