Gardens have been part of psychiatric care for a long time — Victorian asylums often had extensive grounds where patients worked the soil. Modern horticultural therapy is the formalised version of that tradition, with credentialed practitioners, treatment goals, and a growing evidence base across mental health conditions including schizophrenia.
Horticultural therapy in schizophrenia is the structured use of gardening and plant-based activity, led by a credentialed horticultural therapist, to support engagement, motivation, social connection, and recovery alongside standard treatment.
What horticultural therapy is
Horticultural therapy (HT) is delivered by a registered horticultural therapist credentialed by the American Horticultural Therapy Association in the US, or by practitioners trained through Thrive in the UK. The work involves gardening — propagating plants, planting, weeding, harvesting, arranging — within a structured therapeutic frame. Treatment goals are documented and progress is monitored.
It is distinct from "therapeutic horticulture" (less formal, often community-based) and from simple recreational gardening, both of which have value but are not the same as HT. The boundary between formal HT and structured social-and-therapeutic horticulture programmes (sometimes called "green care") is fuzzy in practice.
Why gardening might help in schizophrenia
Several mechanisms have been suggested:
- Outdoor activity in green spaces is associated with mood improvements, better sleep, and lower stress.
- Physical activity supports both metabolic health (a major issue with antipsychotic-related weight gain) and mental health.
- Gardening offers structure, predictable routines, and visible progress — useful for negative symptoms like avolition.
- Working alongside others on a shared task creates low-pressure social contact.
- Caring for plants over time can rebuild a sense of agency and competence.
- Sensory engagement (smells, textures, colours) is grounding and pleasurable.
What the evidence shows
The evidence base for HT in mental health is broader than for schizophrenia specifically, but it is growing. A 2017 systematic review in Preventive Medicine Reports found consistent benefits across mental health conditions for depression, anxiety, and quality of life. Schizophrenia-specific trials are smaller but consistently positive. A study by Kam and Siu in Hong Kong reported improvements in social interaction, work behaviour, and engagement in people with schizophrenia after a 10-week HT programme. Reviews from Thrive in the UK and from Natural England on green care more broadly describe meaningful effects on wellbeing, social functioning, and recovery markers.
Major guidelines like NICE do not specifically recommend HT for schizophrenia, but the intervention is included in many recovery-oriented community programmes.
What a session looks like
HT sessions vary widely. A typical group might meet weekly for 1 to 2 hours at a community garden, hospital grounds, or specialised therapeutic site. Activities are seasonal — sowing seeds in spring, weeding and watering through summer, harvesting in autumn, indoor projects (propagation, planning, arrangements) in winter. The therapist sets the activity to match participants' capacity and goals: a person early in recovery from a psychotic episode might start with simple watering tasks; over months, they might move to leading planting projects.
Conversation happens naturally during the work. Many participants describe HT as the place where they had their first easy social conversations after a long isolation.
Group, individual, and prison/forensic settings
HT is most commonly delivered in groups of 6 to 12. Some private practitioners offer individual sessions. HT is also a common feature in forensic and secure mental health settings, partly because the structured outdoor work fits well with rehabilitation goals and partly because gardens are a powerful change of pace from indoor institutional life.
Sun exposure and heat (some antipsychotics impair temperature regulation — see our piece on heat intolerance), tools, allergies, and dehydration are normal HT-programme considerations. Programmes adapt to participants' needs.
Connections to physical health
People with schizophrenia have substantially shorter life expectancy than the general population, largely from cardiovascular disease related to medication side effects, sedentary behaviour, and smoking. HT contributes light-to-moderate physical activity, time outdoors, and exposure to fresh foods (in programmes that involve harvesting and cooking). It is not a replacement for structured exercise — see exercise and schizophrenia — but it is a meaningful supplement.
Who tends to do well
- People with prominent negative symptoms — flat affect, low motivation, social withdrawal
- People who already enjoy nature or have any background with plants
- People recovering from acute episodes who want gentle, structured re-engagement
- People in residential or supported housing programmes
Who may find it less useful
- People with severe physical limitations (though HT adapts well — many programmes have raised beds, accessible tools, indoor stations)
- People with severe pollen or plant allergies that cannot be managed
- People who actively dislike outdoor work
Cost and access
HT is offered through specialised charities and community programmes more often than through mainstream mental health services. In the UK, Thrive runs gardens and a directory of programmes. In the US, the AHTA programme directory can help locate practitioners and programmes. Many programmes are free or sliding-scale; some are funded through grants or local mental health budgets.
How HT fits with the rest of treatment
HT is an adjunct, not a replacement. It works best alongside antipsychotic medication, primary psychological therapy like CBTp, and other recovery-oriented services. For some people, the garden becomes a long-term anchor in recovery. Others use it for a season and move on. Both are valid uses.
The bigger picture
Modern psychiatric care often happens in clinical settings that feel removed from ordinary life. Gardens are the opposite — they are slow, seasonal, alive, and full of small visible progress. For people whose lives have been disrupted by psychosis, the experience of planting something in March and harvesting it in September can be a powerful counterweight to the discontinuity of acute illness. That is a quietly important part of recovery.
This article is for educational purposes only and is not medical advice, diagnosis, or treatment. Always consult a qualified mental health professional. If you or someone you know is in crisis, call or text 988 in the US, or your local emergency number.