This season's highlights
World Therapeutic Horticulture Day 2026
World Therapeutic Horticulture Day (WTHD) returns on 18 May 2026, inviting people across the globe to celebrate the life‑changing power of gardening for health and wellbeing — and to champion the growing recognition of therapeutic horticulture as a vital, evidence‑based practice.
We will be hosting seminars the week of the 18th May to celebrate. Click read more for the full details!
Therapeutic Horticulture Course
Trellis Therapeutic Horticulture Courses provide foundation and intermediate level training for staff and volunteers working in health, care, education and community roles.
Get Started
Getting started with your therapeutic gardening project can be overwhelming, but we’ve got all the resources and information you need to get gardening. From activity sheets to factsheets, how-to videos and books, we’re here to help you and your group benefit.
Support Us
You can help people facing a host of difficulties, from mental health concerns to physical disabilities. By using the health-boosting power of gardening and nature connection, you can help people cultivate not only plants but their own well-being, resilience, and a renewed sense of purpose.
Learning and Professional Development
We can support you with:
- professional development and recognition
- Connecting you with other projects in the network to exchange good practice
- on-site fieldwork support
- Learning from others around the world
Professional Body
Welcome to the UK Association for Social and Therapeutic Horticulture (ASTH) – the professional body representing therapeutic horticulture across the UK.
Networking Seminars
Throughout the year we arrange in-person networking seminars in various locations across Scotland. These events allow people from all areas of therapeutic horticulture to come together and share their experience and knowledge.
International Seminar Series
Our Seminar Series has been running for 5 years and have grown in size and reputation. The seminars are for anyone who is interested in therapeutic horticulture, for those already working in the field and anyone who is just diving into this wonderful world for the first time.
Latest news
Congratulations Peter!
We’re delighted to share that Peter Sinclair—Occupational Therapist & Garden Lead in Adult Mental Health Services at NHS Fife and...
Trellis Anniversary Celebrated with Unique Floral Clock Display
Gardeners and garden lovers will be pleased to learn that this year’s City of Edinburgh floral clock will celebrate Trellis...
Glasgow Ovarian Cancer Support Group
The Mitchell Library was the fabulous setting for an afternoon of floristry fun with the Glasgow Ovarian Cancer Support Group...
10 reasons to embrace gardening, your secret weapon in living with dementia
Fiona, Trellis CEO, presented a webinar for Dementia Community "10 reasons to embrace gardening, your secret weapon in living with...
Trellis feature in Inspire - Arthritis UK
Trellis features in the latest issue of Inspire, sharing real‑world examples of how gardening transforms wellbeing. The piece brings together...
Grow Careers 2025
Trellis Training and Standards Officer, Emma, and Trellis Trustee, Jim, were stallholders at the recent Grow Careers at RGBE. It...