Created in 1938 by landscape architect Louis Perron, the garden has its own special style: rectangular in shape and built slightly below ground level, it combines the French classical style with the British-style beds. Visitors have an opportunity to admire over 150 species of annuals, bulbs and, especially, perennials.  From April to October, visitors are enchanted by the multitude of colours and scents.

For the last 100 years or so, the National Battlefields Commission has been growing all the flowers used to beautify the park. The greenhouses, among the oldest active in Québec, produce some 50,000 annuals, biennials and perennials.