All portions of the tract not utilized by buildings or paved surfaces shall be landscaped, utilizing combinations such as landscaped fencing, shrubbery, lawn area, ground cover, rock formations, contours, existing foliage, and the planting of conifers and/or deciduous trees native to the area in order to either maintain or reestablish the tone of the vegetation in the area and lessen the visual impact of the structures and paved areas.