Can a Garden Change Your Life? Discovering the Profession of Horticultural Therapy

By Kelly Warnick, HTR, JD
President, American Horticultural Therapy Association

Several years ago, I unexpectedly encountered a healing garden for the first time. A family member was fighting cancer, and I was carrying the weight of worry and exhaustion. During my loved one’s lengthy hospital stay, I wandered downstairs and discovered a very special green space. I did not know it then, but that garden would change my life.

The power of awe in a skillfully designed therapeutic garden can awaken the senses, rejuvenate the human spirit, and renew a sense of possibility for all who visit. The Healing Garden, Endeavor Health, Naperville, Illinois.

As I spent time there, more of this remarkable garden revealed itself. A profusion of plants pulled me in with interesting textures, subtle variations in color, and pleasing fragrances. Private, shaded spaces enclosed by soft foliage felt almost like shelters. In the open distance, water cascaded over a rock structure, creating a rhythmic, calming sound. Nearby, koi surfaced in a pond, seemingly engaging with those gathered around them. With each discovery, I could feel some of that weight beginning to lift.

I had worked in the horticulture industry for quite some time, but I had never experienced a garden like this. It felt as though it was supporting me. Looking around, I saw the garden nurturing others as well—patients, family members, caregivers, and medical personnel who had stepped away for a few moments. Although we did not know one another, the garden created a quiet sense of community and respite.

The calm and restoration I found there gave me the strength to return inside and be fully present for my loved one. The experience also planted a seed—a desire to understand why that living environment had affected me so profoundly. Pursuing that question changed my life. It led me to the remarkable profession of horticultural therapy.

The People-Plant Connection

My experience was deeply personal, but it is not unique. Through my work with individuals and groups, I have witnessed how powerfully the people–plant connection can affect lives during illness, grief, or transition, as well as support lifelong wellness. Again and again, I have seen plants open pathways to fundamental needs for connection, purpose, agency, and hope. When people engage with plants and plant-rich environments, plants can become therapeutic partners supporting restoration and health, belonging, and connection to life beyond oneself.

Horticultural therapy is an evidence-based, client-centered practice grounded in horticulture and the human sciences. Through specialized education, training, and credentialing, professional horticultural therapists assess client needs, establish goals, and adapt plant-based experiences to support physical, emotional, social, and cognitive well-being. They also thoughtfully develop therapeutic green spaces as potent tools for human flourishing.

Horticultural Therapy in Practice

The power of horticultural therapy becomes clearest when we see this intentionality in practice. In rehabilitation, transplanting seedlings might help someone recovering from a spinal cord injury enhance reach, grasp, strength, and endurance. For someone rehabilitating from a traumatic brain injury, planting seeds at a specified depth and completing each step in sequence can strengthen attention, memory, planning, and task completion.

Lavender planted strategically along this handrail-lined ramp provides physical therapy patients with a calming fragrance that may support nervous system regulation as they engage in the demanding work of rehabilitation. Legacy Salmon Creek Healing Garden, Legacy Salmon Creek Medical Center, Vancouver, Washington. 

The profession extends well beyond rehabilitation into wellness and vocational models of practice. For a person living with Alzheimer’s disease, familiar plants and fragrances can support orientation to season, evoke memories, and open pathways to conversation and connection. For a person experiencing ADHD, planting, sensory grounding, and sustained observation may support attention regulation and sharpen focus. Garden and greenhouse programs can also build work-readiness skills such as accuracy, precision, reliability, teamwork, and following multistep procedures.

This breadth of practice is increasingly relevant in modern life, where many people spend long periods indoors, in front of screens, and under persistent demands on their attention. Plants offer a different rhythm: they change gradually, invite sensory awareness, require responsive care, and cannot be hurried. Across community programs, schools, workplaces, and healthcare settings, HT professionals design programs supporting preventive wellness, stress regulation, healthy routines, physical activity, social connection, chronic condition management, adaptation, and quality of life.

Advancing the Profession

For horticultural therapy professionals, the American Horticultural Therapy Association is our professional home. Founded in 1973, AHTA has spent more than 50 years advancing education, ethical practice, credentialing, and recognition. This fall, AHTA will offer the inaugural Horticultural Therapist–Board Certified (HT-BC) examination, establishing a rigorous benchmark for professional knowledge, experience, and ethical responsibility while strengthening recognition of qualified horticultural therapists.

AHTA’s commitment to advancing the profession will come alive at its 2026 Annual Conference, Thriving in the Grove: Building Resilience Through Horticultural Therapy, October 15–18 in San Francisco. Professionals, students, and supporters will connect through presentations, hands-on workshops, panel discussions, and experiences such as Plants & Paws, where allied therapies converge to deepen their impact on human health. Participants will also hear keynote speaker Jennifer Jewell and explore the San Francisco Botanical Garden, the National AIDS Memorial Grove, and the Gardens of Alcatraz.

Creating the Conditions for Growth

Alcatraz may seem an unlikely place to bring this story full circle, yet its gardens lead us back to the question at its heart. In the 1940s, incarcerated individuals cultivated parts of the island under guard. Elliott Michener created cottage-style gardens that became a source of refuge, purpose, and possibility. After his release, he worked at a horticultural farm.

Cultivating many garden areas on Alcatraz Island offered incarcerated individual Elliott Michener refuge, purpose, and a new vision of what was possible. The Gardens of Alcatraz, San Francisco, California.

Michener’s experience was not formal horticultural therapy, but it embodied the essence of the practice. Within one of the nation’s most restrictive environments, caring for plants created space for accomplishment, trust, creativity, and a different vision of who he could become. The garden did not remove the walls, but it changed what was possible within them and what Michener carried forward.

Can a garden change your life? A garden changed mine. The Gardens of Alcatraz changed Michener’s trajectory. The profession of horticultural therapy harnesses this potential through specialized knowledge, intentionality, professional credentialing, and compassionate care. It asks not only what plants can grow, but what becomes possible for people when we create the right conditions for growth.

All articles are copyrighted and remain the property of the author.

Article URL:
https://www.gardensmart.com/?p=articles&title=Can_a_Garden_Change_Your_Life_Discovering_the_Profession_of_Horticultural_Therapy