This organisation works across Scotland to support a network of 340 therapeutic gardening projects and practitioners.  It helps projects as they become established, and with their development.  The charity offers site visits, advice and information, and runs a variety of network meetings where members can share good practice and new ideas.

In June 2016, Trellis was awarded a two-year grant (£5,000 and £4,900) which will be put towards a project with the Scottish Prison Service.

Trellis aims to increase the availability of therapeutic gardening for people across all Scotland’s 15 prisons and is planning a series of knowledge and training sessions to help with the development of the project.  The aim is to build new links between prisons and their local communities, increase the number of people who benefit, provide support to practitioners including prison officers who deliver the gardening activity programmes, and increase learning for individuals who take part.