RE:Filed a experts reportGo to SEDAR. Read all the documents not just releases and make your own decisions. TO: Fertimar Minerao E Navigao Ltda. AND TO: GrowMax Resources Corp. I, Donald H. Hains, P.Geo., am the author and consent to the public filing of the expert report titled Experts Report on the Fertimar Lithothamnion Project, Bahia, Brazil, signed and dated effective September 11, 2018 (the Experts Report), prepared by Hains Engineering Company Limited for Fertimar Minerao e Navegao Ltda. and GrowMax Resources Corp. (GrowMax). I hereby consent to being named in the Supplement (as defined below) and to use any extracts from or a summary of the Experts Report in the press release of GrowMax dated September 11, 2018 (the Press Release) and to the description of the Experts Report in GrowMaxs Supplement to the Management Information Circular dated August 27, 2018 (the Supplement). I certify that I have read the summary of the Experts Report included in the Supplement and that the summary is a proper summary of the Experts Report. I further certify that I have read the Press Release being issued and filed by GrowMax and that the information therein relating to the Experts Report is accurate. To the best of my knowledge, information and belief, the Experts Report contains all scientific and technical information that is required to be disclosed to make the Experts Report not misleading. I have no reason to believe that there are any misrepresentations in the information contained in the Supplement that are derived from the Expert Report referred to above or that are within my knowledge as a result of the services I performed in connection with such Expert Report. DATED this 11th day of September, 2018. Donald H. Hains, P.Geo. Hains Engineering Company Limited