Ontario has opened the door to quickly expanding cannabis retail, but one resident in five lives in towns and cities where selling weed is still illegal.

Two of the three schools announced a rule prohibiting all students, faculty and visitors from smoking and vaping of any type.

Chief executive Bruce Linton says he has lined up an option to acquire a "humongous" greenhouse in California as part of a broader strategy to enter the U.S. market quickly, even though the drug is currently illegal at the federal level.