4. Knowledge in Planning Hard Structures A landscape design is not just about planting, and can often include a combination of retaining walls, stairs, pools and terraces. A landscape designer’s knowledge of site surveying, level changes and quality hardscape construction means that the features in a design can be planned correctly. “Landscapes are not just about soft things like plants and lawn. You use hard structures to define spaces sometimes but also use them to divide up a space or allow for level changes. Retaining walls, steps or even grading slopes, it's all different methods of dividing up a space. Hard structures are always part of it.” – Rory.