The Mercer Garage roof becomes an award-winning public garden

The garden on top of a three-story garage near Seattle Center won this year’s top award from the Washington Chapter of the American Society of Landscape Architects. … The 30,000-square-foot garden is on Mercer Garage at 300 Mercer St. City officials say it is the first publicly accessible, large-scale community rooftop garden in the U.S.