All portions of the lot not covered by buildings and other structures, outdoor deposit areas, areas for off-street parking, loading and driveways and any other paved areas shall be suitably landscaped with trees, shrubs, lawns or other suitable landscaping or, if not disturbed by filling, grading, excavation or other construction activity, may be left as natural terrain when having a location, character, size and shape and vegetative cover that supports the landscaping plan for the lot.