Where a plant does well and where a plant does best is entirely two different things. In fact in most cases it means the plant is located in two entirely different locations in the yard. Whether it is soil compatibility, sun exposure, wind or wetness. Plants have their own hardiness zones and "vital signs in which they thrive and flower profusely throughout their respective seasons.
Plantings can be broken down into a few segments of importance in the role it plays as part of the landscape design.