CANNA Flush is a product to clean substrates and plants from any excess nutrients. Excess nutrients in the root zone of a plant can lead to overfertilisation or malnutrition, for example. When used just before harvest it makes sure the plant gets rid of all excess, which will lead to a clean and tasteful harvest. CANNA Flush effectively cleans the substrate without killing any useful bacteria or beneﬁcial fungi, as can be the case when you use reverse osmosis or de-mineralised water. It can be used on all substrates. CANNA Flush is recyclable.