Greenhouse Molson Hospitality Greenhouse Photo: Jardin botanique de Montréal (Michel Tremblay) Garden of Weedlessness Photo: Jardin botanique de Montréal (Michel Tremblay) Tropical Rainforest Greenhouse Photo: Jardin botanique de Montréal (Michel Tremblay) Tropical Food Plants Greenhouse Photo: Jardin botanique de Montréal (Michel Tremblay) Orchids and Aroids Greenhouse Photo: Michel Tremblay Begonias and Gesneriads Greenhouse Photo: Jardin botanique de Montréal (Michel Tremblay) Arid Regions Greenhouse Photo: Michel Tremblay La Hacienda Photo: Michel Tremblay OngletsDescription NOTE TO VISITORS The penjings exhibition greenhouse (Garden of Weedlessness) will be closed for the summer. The other greenhouses remain accessible. Year round, visitors to the greenhouses can admire permanent and various thematic exhibitions showcasing the Jardin botanique's plant collections. In winter, the greenhouses beckon with their warmth and beauty. In summer, the lush tropical vegetation and the exotic penjing, a unique collection of landscapes lovingly fashioned in containers by specialized horticulturists, are always popular. Each specially themed greenhouse offers a window on the many ways that plants adapt to their environment. The exhibition greenhouses, first opened in 1958, cover an area of 4,000 m2. The 36,000 plants they contain represent some 12,000 species, varieties and cultivars. Access to the Exhibition Greenhouses is through the Reception Centre, located behind the Administration Building. An impressive series of production and collection greenhouses, not open to the public, helps maintain the greenhouse collections. AreaApproximately 4,000 m² (0.4 hectare)TaxaApproximately 1,670 Map Shade garden Flowery Brook and Lilacs Frédéric Back Tree Pavilion Aquatic Garden Reception Gardens Peace Garden Courtyard of the Senses Chinese Garden Youth Gardens Alpine Garden Japanese Garden Leslie Hancock Garden Shrub Garden Toxic plantsMedicinal plantsMonastery GardenQuébec Corner Garden of Innovations Food Garden Perennial Garden Arboretum Rose Garden First Nations Garden HistoryHistorySteady growth The first facilities erected at the Garden in 1932 were an administration building, a boiler house and a greenhouse – the bare essentials! Work on the greenhouses began in 1939. But recently elected Quebec Premier Adélard Godbout scorned the project as "a few ferns in a Garden [...] to cost $11 million ..." In 1940, his Minister of Roads and Public Works ordered work to be stopped on the outdoor gardens and the steel framework for the exhibition greenhouses to be demolished. Production and exhibition greenhouses came later, and were officially opened in 1956 to mark the Jardin botanique's 25th birthday. In those days, a paved road separated the main building and the greenhouses. It wasn't until the whole building was renovated in 1994 that the reception greenhouse was built, linking the building with the ten exhibition greenhouses. Major changes were made to the entrance and the entire area around the building in 2006. For more information80 Years of History & Archives at the Botanical Garden Did you know?Did you know?Decked out in white for summer In spring, a special lime-based paint is applied to the greenhouse glass to reflect some of the sun's rays and help lower temperatures inside. The product is removed in fall with a gentle, environmentally friendly acid. Lighting – free from the sun The lighting in the exhibition greenhouses is natural year round. Only a few lights are turned on late in the day to allow visitors to admire the plants "in a new light." Irrigation – artificial rain Most of the watering in the exhibition greenhouses is done by hand, to meet the needs of the different plants. The horticulturists also have to take account of each greenhouse's orientation, since the soil on the south side dries out faster than that on the north side and has to be watered more frequently. Humidity levels are also controlled in this way. For instance, the Tropical Rainforest Greenhouse is sometimes watered three or four times a day. The Ferns, Tropical Food Plants and Molson Hospitality greenhouses are all equipped with an automatic irrigation system. Pest control The Jardin botanique de Montréal has an integrated pest management system to control harmful pests and reduce its ecological footprint. The system has produced excellent results in the exhibition greenhouses.