A plant biostimulant is a product approved by the Ministry of Agriculture with a marketing authorization number (MA). It acts on the stimulation of the plant metabolism allowing it to resist stress… Examples : OSIRYL and XEOX Espaces Verts. A nutritional biostimulant is the extension of use of a plant biostimulant approved with fertilizing materials, in accordance with NF U44-204. Examples: ACTIMUS, EVER 7, NUTRIBIO+, NUTRIBIO 4.3.6 , NUTRIFIX NK.