The Arizona Department of Transportation allows placement of landscaping in the right of way provided the landscaping does not include anything that would be a hazard to the motorist.
Lists of allowable plants may be obtained by contacting the Permits Office.
To obtain a permit to place landscaping in the right of way submit a permit application and five sets of drawings showing what will be done in the right of way.
The application form and instructions are available here.
For more information contact us at 520.388.4237.