In Walt Disney’s vision of the future, public landscaping utilized only edible plants. This idea claimed that no one would go hungry due to the foods freely available in the public space. Tomorrowland demonstrates this concept by mostly using edible plants for landscaping. There are lavender hedges, pepper trees, and more throughout that area of the park; a monument to Disney’s vision.
More recently, a group decided to implement a similar idea in their city. One of them, Pam Warhurst, explained the concept and process at TED.
I personally hope that more cities will participate in such a plan!