rootgrowâ„¢ 150g contains mycorrhizal fungi which naturally increase nutrient and water uptake by forming a highly efficient secondary root system. It is completely natural and plant-friendly fungi suitable for use on flowering plants, trees, shrubs and edibles. An economical mid-range pack size. One pouch will treat up to 8×2 Litre pots or a 50L pot. Comes with a handy 10ml scoop. One application will support a plant for its entire lifetime! Please note: rootgrowâ„¢ doesn’t work on Brassicas, Rhododendrons, Azaleas, Heathers, Cranberries and Blueberries. Please use to rootgrowâ„¢ Ericoid for those plants (except Brassicas).