Every Thursday and Sunday of the month, Columbia hosts a greenmarket where local farmers can sell their produce to residents of the city. In addition, from April to November Hodgson's farm, a local New York gardening center, joins the market bringing a large selection of plants and blooming flowers. The market is one of the many operated at different points throughout the city by the non-profit group GrowNYC. Dining services at Columbia spends 36 percent of its food budget on local products, in addition to serving sustainably harvested seafood and fair trade coffee on campus. Columbia has been rated "B+" by the 2011 College Sustainability Report Card for its environmental and sustainability initiatives.