Plantworks Rootgrow contains a blend of carefully isolated naturally occurring fungi of UK origin called mycorrhizal fungi. The mycorrhizal fungi in Rootgrow are living organisms, these fungi are completely natural and are grown at Plantworks production facilities in Kent. Rootgrow also contains an inert clay carrier which acts as a substrate for the fungi to grow through and a few bio-additives. which enhance mycorrhizal colonisation In most soils there simply are not enough of the right type of native mycorrhizal fungi close enough to the new plants roots to colonise fast enough, to show the incredible range of benefits complete colonisation of a host plants roots can achieve. Once in contact with suitable host plants, they attach themselves to the roots, where in association with the plants roots system they develop a secondary root system. This encourages root growth in plants and aids the absorption of nutrients and water from the soil, reducing stress, which in turn can increase resistance to drought and pest attack, and the quantity of fertilisers required. By planting with rootgrow the plant is able to quickly establish a secondary root system that increases the amount of nutrients and moisture available to the plant. Gardeningforall highly recommends this product for use when planting new plants, shrubs and trees.