We continually use this to help the rapid development of the root system of all the bulbs we plant and as such highly recommend it. The RHS also recommend its use. It is a friendly mycorrhizal fungi which will improve the growth of the bulbs when they are dipped into the paste made by adding water to the granules . Especially recommended for Arisaema’s, lilies, gladioli, snowdrops, specie tulips, trillium’s and begonias – should treat as manufacturers instructions. 150g.