Operations Inside The Tweed Inc. Production Facility As Trudeau Win Signals Gains For Marijuana Stocks. Investors are delusional when it comes to Canadian marijuana companies The model of state-run alcohol sales gives us an important clue as to why high-flying marijuana producers face tough times ahead Allan Gregory. Medical marijuana plants grow in a climate controlled growing room at the Tweed Inc. facility in Smith Falls, Ontario, Canada, on Nov. 11, 2015. Construction and marijuana companies are poised to benefit from the Liberal Party’s decisive win in Canada’s election, with leader Justin Trudeau vowing to fund infrastructure spending with deficits and legalize cannabis. (James MacDonald/Bloomberg/Getty Images)