I am revising our city's water resource management & conservation ordinance. I'm considering adding some requirements for builders to provide a xeriscape option, and to require that at least one of their model homes is xeriscaped. At the same time, I'm also working on an incentive program for converting existing yards to xeriscape. My problem is in how to define it--Xeriscape is one of those things that I know when I see it, but I'm not quite sure how to define it from a regulatory perspective. It is also complicated a bit because xeriscape varies a bit between climates & regions.
Also, we are wanting to exempt vegetable gardens from portions of our outdoor watering restrictions. Again, I find myself in a quandry of trying to define what consistutes a vegetable garden.
Some help with those definitions, along with any suggestions of places with good xeriscape conversion incentives is appreciated.