General areas/common areas: All property shall be landscaped with at least grass or other ground cover, and in addition shall have trees, as approved by the Planning Board, planted in a ratio of not less than 10 per acre in multifamily property and a minimum of two shrubs or one tree per 250 square feet in commercial property in all areas of the site not occupied by buildings, pavement, sidewalks, this is in addition to any required screening.