Lurie Garden is a 2.5-acre (10,000 m2) garden located at the southern end of Millennium Park in the Loop area of Chicago in Cook County, Illinois, United States. Designed by Kathryn Gustafson, Piet Oudolf, and Robert Israel, it opened on July 16, 2004. The garden is a combination of perennials, bulbs, grasses, shrubs and trees. It is the featured nature component of the World's largest green roof. The garden cost $13.2 million and has a $10 million endowment for maintenance and upkeep. It was named after Ann Lurie, who donated the $10 million endowment. For visitors, the garden features guided walks, lectures, interactive demonstrations, family festivals and picnics.
The Garden is composed of two "plates" protected on two sides by large hedges. The dark plate depicts Chicago's history by presenting shade-loving plant material. The dark plate has a combination of trees that will provide a shade canopy for these plants when they fill in. The light plate, which includes no trees, represents the city's future with sun-loving perennials that thrive in the heat and the sun.