Certification Testing

Computer Testing Centers

Select National Association of Landscape Professionals certification exams can be taken at PSI computer testing centers (Manager [CLP], Interior Technician [CLT-I], Horticultural Technician [COLP], Lawn Care Technician National, and Lawn Care Technician/cool season [CTP-CSL]). With offices located throughout the United States, PSI testing centers offer you the convenience of scheduling an exam near your work or home. Visit the "Find a Test Center" page on the PSI website to locate a testing center in your area. You have the flexibility to schedule your exam on the day and time that best meets your busy schedule. To register for a certification exam in a testing center:

  • Fill out a registration form and send it to the NALP office. The NALP will process the registration and will send the candidate an electronic authorization letter, containing a unique authorization number.
  • Visit the "Find a Test Center" page on the PSI website to locate a testing center in your area.
  • Contact the PSI Central Registration office to schedule the location, date, and time of your exam. You will be asked for your unique Authorization Number, provided by NALP, to confirm your testing eligibility and schedule the exam. PSI requires at least 24-hour notice to schedule an exam.
  • On the date of the exam, arrive at the pre-selected testing center and present the NALP authorization letter, the PSI exam confirmation, and a valid photo ID at the PSI Test Center.

After completing the certification examination, PSI will transmit the results back to the NALP office for additional processing. The NALP will send official results within 30 days. For more information, please contact the NALP certification department by calling 800-395-2522.

Certification Test Dates (Technician-Exterior, and pencil-and-paper)

Completed registration forms due 30 days prior to the written exam dates. If less than 30 days, please call NALP for availability, 800-395-2522.

Landscape Industry Certified (formerly CLP, CLT-I, COLP, and CTP-CSL) Test Dates*

October 18, 2017
Louisville Marriott Downtown
Louisville, KY

*Landscape Industry Certified Exam registration with NALP is required. No walk-up registrations allowed.

Landscape Industry Certified — Technician-Exterior (formerly CLT-E) Test Dates

Click here for the full list of Technician-Exterior test dates.