Education & Careers
AHTA Accredited Certificate And Individual Horticultural Therapy Coursework


What is an AHTA Accredited Certificate Program?

An AHTA Accredited Certificate Program is a college-level educational program that offers the equivalent of nine (9) semester credits in horticultural therapy coursework. The AHTA accredited certificate programs provide a foundation in the theory and application of horticultural therapy for diverse populations.


An AHTA Accredited Certificate Program is one that has applied for and received accreditation status by the American Horticultural Therapy Association. The AHTA Certificate Program must maintain accreditation based on the standards set by the Association.


Accreditation ensures that horticultural therapy certificate programs meet nationally endorsed standards in the profession. Certificate programs accredited by AHTA offer all nine (9)-semester credit hours within their educational program. 


An AHTA Accredited Certificate Program provides course content that fulfills the requirements for professional registration with the American Horticultural Therapy Association. An AHTA Accredited Certificate Program may be offered as a component of an academic degree program to fulfill the requirements of a degree in horticulture with a concentration in horticultural therapy. To meet the requirements for professional registration with the American Horticultural Therapy Association, horticultural therapy coursework completed as part of the certificate program, independent of bachelor’s/master’s degree, must be from an AHTA Accredited Certificate Program.

Become an Accredited Certificate Program with the American Horticultural Therapy Association (AHTA)

Horticultural therapy certificate programs are college-credit instructional programs designed to provide a foundation in the theory and application of horticultural therapy for diverse populations. In accrediting these programs, the American Horticultural Therapy Association (AHTA) assures that the program meets nationally-endorsed standards in the profession, and meets the horticultural therapy requirements for the AHTA’s voluntary professional registration program. Certificate programs are required to meet the specific criteria as defined by AHTA in these policies and procedures.

Accreditation further assures that the program achieves designated outcomes for the institutions as well as AHTA’s educational requirements and is consistent with their respective goals and objectives.

In accrediting a certificate program, AHTA recognizes horticultural therapy coursework taught by a registered horticultural therapist (HTR).


  • Before applying to have a program accredited by AHTA as an Accredited Certificate Program, review the Policies and Procedures.
  • Complete the online Application Form to have a Certificate Program accredited by AHTA

Application for a New Program


  • Complete the online Renewal Form
  • Notify AHTA of changes to an accredited Certificate Program

Current Certificate Programs Renewal or Program Updates

*Note that graduates of certificate programs are not ‘certified’ horticultural therapists. They receive a certificate of completion of horticultural therapy coursework which, if accompanied by the affiliated college or university transcript, will be required should they pursue professional registration with AHTA.

AHTA Accredited Certificate Programs


The following certificate programs have been accredited by the American Horticultural Therapy Association. For current certificate program schedules, visit the program websites provided below.


  • College of Dupage

    College of Dupage


    Main Contact: Brian Clement


    Email:  clement@cod.edu 

    Phone (630) 942-2526

    Visit the website for more information.



  • Delaware Valley University

    Delaware Valley University


    Main Contact: Joan Stelmach, HTR


    Email: cps@delval.edu

    Phone: (215) 489 4848 


    Visit the website for more information.

  • Horticultural Therapy Institute (HTI)

    Horticultural Therapy Institute (HTI)


    Main Contact: Christine Capra


    Email: ccapra@htinstitute.org

    Phone: (303) 388 0500


    Visit the website for more information.

  • Oregon State University

    Oregon State University


    Main Contacts: Melissa Bierman, MS, MHT, HTR & Anne Gearhart


    Emails: melissa.bierman@oregonstate.edu & anne.gearhart@oregonstate.edu

    Phone: Coming soon. 


    Visit the website for more information

  • Rutgers, The State University of New Jersey

    Rutgers, The State University of New Jersey


    Main Contact: Gary Altman MS, CRC, HTR


    Email: gla32@sebs.rutgers.edu

    Phone: (848) 932-6321


    Visit the website for more information.

  • Temple University

    Temple University


    Main Contact: Peg Schofield, MA, HTR


    Email: tyler@temple.edu

    Phone: (215) 777-9090


    Visit the website for more information.

  • University of Florida

    University of Florida 


    Main Contact: Elizabeth (Leah) Diehl, RLA, HTM


    Email: CHTinfo@ifas.ufl.edu 

    Phone: (352) 294-5003


    Visit the website for more information. 

  • University of Tennessee at Knoxville

    University of Tennessee at Knoxville


    Main Contact: Derrick Stowell, Ph.D., CTRS, HTR


    Email: dstowell@tennessee.edu

    Phone: 865-974-7151


    Visit the website for more information 

  • UCLA Extension

    UCLA Extension


    Main Contact: Melissa McDonald, Program Manager


    Email:  mmcdonald@unex.ucla.edu

    Phone: 310-825-9586.  


    Visit the website for more information