The American Horticultural Therapy Association — (AHTA) is a nonprofit organization whose mission is to promote and advance the profession of horticultural therapy as a therapeutic intervention and rehabilitative medium. AHTA is the only US national organization that promotes and advances the profession of horticultural therapy. The main office is in Prussia, Pennsylvania. Located at 150 S. Warner Rd., King Prussia, PA 19406.
By phone at. 484-654-0357

Thrive, UK has been using social therapeutic horticulture and gardening to change people’s lives since 1979 and provides numerous resources on their website.

Colorado State University/Department of Horticulture and Landscape Architecture — all classes offered by the Horticultural Therapy Institute are accredited for academic credit by Colorado State University’s Department of Horticulture.

The Therapeutic Landscapes Network is a knowledge base and gathering space about healing gardens, restorative landscapes, and other green spaces that promote health and well-being. They are an international, multidisciplinary community of designers, health and human service providers, scholars, and gardeners. The focus is broad but the primary emphasis is on evidence-based design in healthcare settings.

Literature by HTI

The Profession and Practice of Horticultural Therapy

Editors: Rebecca L. Haller, Karen L. Kennedy and Christine L. Capra

Horticultural therapy is a profession that serves the needs of practitioners having a broad understanding of the theories, techniques, and strategies for effective program development and management. This book is a manual of theories of horticultural therapy containing models of practices and programs.

Selected Contents
Overview of Horticultural Therapy Practice. Introduction. Horticultural Therapy. Related people-Plant Efforts, and other Therapeutic Disciplines. The Therapist/Client Relationship. Issues for the Profession. Theories Supporting Horticultural Therapy Efficacy and Practice. People Plant Response. Trauma Recovery and Brain Theories. Theories that Inform HT Practice. Practice with Program Models. Therapeutic Model. Vocational Model. Wellness Model. Tools for the Therapist. Accommodations and Adaptive Techniques. Assessment and Documentation Strategies for HT Intervention. Tools for Program Management.

Catalog no. K37990
February 2019, 368 pp.
ISBN: 978-1-1383-0869-5

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Horticultural Therapy Methods:
Connecting People and Plants in Health Care, Human Services, and Therapeutic Programs
Second Edition

By Rebecca L. Haller and Christine L. Capra, Ed.
2016 CRC Press; Hardcover 184 pages


By Rebecca L. Haller and Christine L. Capra, Ed.
2016 CRC Press; Hardcover 184 pages

Horticultural therapy is a recognized and respected therapeutic modality conducted by trained, registered professionals. This book presents types of programs, settings, and goals in horticultural therapy. It outlines treatment planning; development of sessions to meet treatment objectives; motivation and behavior management techniques; documentation guidelines; practical approaches for wellness; and resources for activity ideas. All existing chapters in the current edition are updated, and this new edition contains a new chapter on planning horticultural therapy sessions.

Key Features:

  • Contains professional methods that are specifically geared for horticultural therapy practice.
  • Includes methods for the entire treatment process, including goals, objectives, sessions, activities, and documenting participant change.
  • Provides guidance for horticultural therapy session planning.
  • Contains wide-ranging examples of treatment strategies.
  • Concepts and methods are also applicable to therapeutic horticulture use and related endeavors, such as school and community gardening.

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Key Articles

Journal of Therapeutic Horticulture

Horticultural Therapy Methods

American Horticultural Therapy Association