RESEARCH

Horticultural Therapy: A Pilot Study on Modulating Cortisol Levels and Indices of Substance Craving, Posttraumatic Stress Disorder, Depression, and Quality of Life in Veterans

Detweiler, M.B., Self, J.A., Lane, S. et al. (2015). Horticultural therapy: A pilot study on modulating cortisol levels and indices of substance craving, posttraumatic stress disorder, depression, and quality of life in veterans. Altern Ther Health Med., 21(4), 36-41.

Program Types: Therapeutic

Population Groups: Military/Veterans

Setting or Context: Community Gardens, Public/Botanical Gardens

Health and Wellness Outcomes: Enhanced Emotional Well-being, Increased Social Engagement & Skills, Improved Quality of Life

Allied Profession Intersections: Behavioral Therapy

Type of Activity: Outdoor Gardening, Forest/Natural Area Immersion

Evidence Type: Case Studies, Qualitative Research

Measurement and Evaluation: Metrics for Mental Health, Program Effectiveness

Access: Free

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Summary

A retrospective study examined self-initiated horticultural therapy (HT) among veterans in a 28-day inpatient Substance Abuse Residential Rehabilitation Treatment Program (SARRTP) at a Veterans Affairs Medical Center. 50% of 56 veterans voluntarily participated in gardening, engaging in passive (relaxing, observing plants) and active (watering, weeding, harvesting) activities. Veterans described the garden as a “safe haven” and reported feeling “calm,” “serene,” and “refreshed” after spending time in the garden.

Despite no formal intervention, veterans sustained the program for two years post-study, demonstrating the therapeutic power of autonomy in recovery. Prior research also linked HT with reduced cortisol levels, improved mood, and lower alcohol cravings, highlighting its potential as an evidence-based complementary therapy for veterans overcoming substance abuse and PTSD

Link

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