Photographer: James MacDonald/Bloomberg Photographer: James MacDonald/Bloomberg Growing Green: Weed From an ex-Chocolate Factory in Canada A factory once owned by Hershey in Canada now makes products that offer a slightly stronger buzz than a milk chocolate kiss. The site in Smith Falls, Ontario, has 168,000 square feet that is licensed by the government for medical marijuana production. Tweed's sales could reach C$100 million a year for its many home-grown varieties and blends. Photographs by James MacDonald/Bloomberg By Kenneth Hughes @kntau More stories by Kenneth Hughes November 23, 2015, 11:40 AM EST Almost fully mature marijuana plants grow in one of the climate-controlled growing rooms. An employee makes cuttings from a mother plant to grow new ones. The company's operations occupy 180,000 square feet, according to Tweed.com. Since its introduction in 2001, Canada's Marihuana Medical Access Program (MMAP) has swollen exponentially from fewer than 500 to more than 30,000 people growing the plant for medical purposes. An employee displays a tray of medical marijuana in one of the drying rooms. One of Tweed's six fully contained and climate-controlled growing rooms. A worker performs a quality check as the buds come out of an automated trimmer. Some of the plants are manually cut and trimmed. Regulations enable licensed growers to provide quality-controlled marijuana for medical purposes, produced under secure and sanitary conditions. A lab technician inspects some of the final product. Tweed's Smith Falls facility is a building complex that was operated by Hershey for 45 years and was capable of producing 200,000 chocolate bars daily.