This module’s focus is on appropriate plant selection, not only for design intent and aesthetic value, but with regard to the site, sustainability, its contribution to biodiversity and future maintenance requirements. The reasons for plants failing to establish in the garden and designed landscape are investigated. There is an emphasis placed on the skills of plant knowledge and identification, including an appreciation of the biological requirements of plants as a living aspect of the designed landscape. Plant usage and features in the designed landscape are placed in their historical and contemporary contexts to see how selection and usage have changed over time.