From TakePart.com (Rachel Cernansky):
Urban gardeners have no shortage of motivation to grow food: access to fresh vegetables, a chance to interact with nature in a concrete jungle, an excuse to spend time outdoors and take in some of the depression-alleviating microbes that live in soil. Now there’s another reason to replace your green lawn with leafy greens: water conservation.
Vegetable gardens often use less water than many picturesque green lawns—in some cases, half as much, according to gardening and water experts. In Denver, for instance, residents, schools, and water agencies have started installing vegetable gardens to save water. The push to factor water consumption into the decision to replace lawns with urban gardens seems to be strongest in metropolitan Denver, but the potential exists in just about any drought-prone area…
Denver Water, Colorado’s largest water utility, used to promote xeriscaping—replacing lawns with drought-resistant plants—as the optimal water-saving way to landscape a piece of property. Today, though, the agency encourages people to look not just at the amount of water used but at the overall value that that water will provide.
“I think vegetable gardens are a perfect example: You can save water. You can grow food. You can have organic vegetables for your family at the same time,” said Mark Cassalia, water conservation specialist for Denver Water.
“Our years of data from water bills and our partnership with Denver Water has helped us to understand that community gardens use about 40 percent less water than lawns,” said Jessica Romer, director of horticulture at Denver Urban Gardens, a nonprofit that operates a network of community gardens around the city…
Aurora Water, the water agency that serves the city of Aurora, just east of Denver, is also pushing urban farms. After converting large grass plots that the agency owned to vegetable gardens at two sites, the city noted a 74 percent drop in irrigation. The agency also offers a gardening class for residents interested in learning how to grow vegetables.