What are the key components to landscaping?

Landscaping is a blend of art and science. In order to be a proficient landscaper, one must scientifically understand which types of plants react to which types of elements and conditions. In order to create a thriving landscape, the science must make sense amongst these elements for the ecosystem to thrive. Landscaping is also artistic in the sense of creating something that fits into the surroundings and is pleasing to the eye. The best landscapers understand the science and also have an artistic ability to express beauty.