This working group focuses on the theories, techniques and practice of using the central material of landscape design: vegetation. Plant material and its applications, together with technical aspects of vegetation establishment in particular situations in relation to both difficult sites as well as the use of vegetation in and on buildings are important topics

- Plant material as important landscape design medium
- Planting design
- Plant material vocabulary
- Historic use of plant material
- Quasi-ecological classifications of perennials such as Hansen's
- Plant production and nursery stock
- Planting sizes and densities
- Establishment techniques
- Vegetation technology
- Use of plants in different landscape contexts
- Municipal plants
- Establishment maintenance
- Forestry planting techniques
- Roof gardens technology
- Interior planting techniques
- Climbers