Webproposed approach to the regulation of cannabis. Learn about the current status of canabis (marijuana) laws in canada, and the work being done to. Webyou must be 19 and older to buy, use, possess and grow recreational cannabis. This is the same as the minimum age for the sale of tobacco and alcohol in ontario. Webprovinces and territories are responsible for determining how cannabis is distributed and sold within their jurisdictions. How cannabis can be sold.