At Envirogreen when it comes to sustainable landscaping, xeriscaping is only a part of the 'green' puzzle. Extensive gravel and rock use actually increases the surface temperature of the landscape exasperating the urban heat island effect.
The heat island effect (the process where pavement and concrete intensive environments, like cities, retain heat longer and have hotter temperatures than their rural counterparts) pertains to rocks and gravel  which retain heat from the sun and increase the overall temperature of Phoenix.

When we think about the desert and sustainable landscaping we should not necessarily jump to the conclusion that gravel and rocks are the best answer to reduce water consumption. Green native plants to incorporate into an urban scape is the best use for a sustainable landscape. 

To learn more about Envirogreen Landscaping visit www.envirogreenaz.com and watch their video at http://www.youtube.com/watch?v=99nQpYD1QIM.
 
About Envirogreen Landscaping
Founded in 2001 Envirogreen Landscaping focuses on creating eco-friendly environments through landscape design and architecture. Based out of Phoenix and Scottsdale, Arizona this company offers installation services and sustainability experts for any commercial and residential landscape.