Construction Trade Exam Research Area

CR-21 Landscaping and Irrigation Systems
(Dual License)

Apply for the License

Arizona Registrar of Contractors
1700 W Washington St, Suite 105
Phoenix, AZ 85007
Phone: (602) 542-1525
Licensing Link

Exam Administrator

PSI Services, LLC
3210 E. Tropicana
Las Vegas, NV 89121
Phone: (800) 733-9267
Examination Link

Exam Type


Exam Content

Subject Areas# of
Irrigation Systems 15
Trees and Shrubs 10
Grass and Groundcover 8
Grading and Drainage 6
Soils, Amendments, and Chemicals 10
Desert Plants 5
Hardscaping 8
Low Voltage Electricity 5
Rules and Regulations 3
General Knowledge 5

Total Number of Test Questions: 75
Time Allowed (Minutes): 180
The state of Arizona also requires that you take and pass a written Business Management exam for this trade

Go to Business and Law Offering

Reference Books Permitted in the Exam

1. Code of Federal Regulations - 29 CFR Part 1926 (OSHA), GPO - OR - (OSHA) Selections by PSI, (latest amendments). Buy from PSI

Reference Books NOT Permitted in the Exam

1. Arizona 811: Arizona Blue Stake, Inc., July 2010 (Revised 2015), Arizona Blue Stake. Doc Link
2. Arizona Registrar of Contractors Rules, 2009 (Revised 2014). Doc Link
3. Arizona Workmanship Standards for Licensed Contractors, 2009, Arizona Registrar of Contractors. Doc Link
4. Fences and Retaining Walls, 1990 (Revised 1996), William McElroy. Buy at Amazon
5. Landscaping Principles & Practices, 6th Edition, 2003 (Out of Print), (Revised 7th Edition, 2009), Jack Ingels. Buy at Amazon
6. Landscape Construction, 3rd Edition, 2010, David Sauter. Buy at Amazon
7. Simplified Irrigation Design, 2nd Edition, 1995, Pete Melby. Buy at Amazon
8. Sustainable Landscape Management - Standards for Landscape Care in the Desert Southwest, 1st Edition, 2009, Janet L. Waibel. Buy from Publisher

Recommended Study Materials

Arizona • CR-21 Landscaping and Irrigation Systems (Residential/Commerical)
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