There are many types of shapes and textures that can be created in gardens. A good eye for design and knowledge of math is very helpful.
Watch Ken Simmons, a landscape architect, as he explains how landscape design starts with studying how various people use an outside area like a park. Landscape architects have to take into account two forms during design. The organic form are elements like a creek, trees, etc. The non-organic form are the objects placed in the park like bench, flower bed, flag pole, pathways, etc. Landscape architects use various types of drawings to implement design.