Whenever a buffer strip has been specified by this chapter, or is required by the Planning Board, such buffer strip shall be of the width so specified or required, and shall:
A. 
Be landscaped by the planting of grass and/or ground cover, shrubs and trees. Two shrubs and one tree shall be provided for each 500 square feet of area, or fraction thereof, of the buffer strip. If the buffer strip is naturally wooded in its entire width, it shall remain in its natural condition in place of the require shrubs and trees.
B. 
Not contain parking area or driveways, unless specifically permitted elsewhere in this chapter, nor other accessory structures or uses except for decorative purposes or passive recreational purposes.
Wherever screening has been specified by this chapter or is required by the Planning Board, such screening, unless otherwise required, shall extend to the lesser of the required minimum front yard setbacks of the lot to be screened and shall, as a minimum, consist of dense hedges of deciduous, and at least 50% evergreen shrubbery, planted at 30 inches on center in a single row or at five feet on center in each of two staggered rows, provided that if all evergreens are used, they may be planted at five feet on center in a single row or at 10 feet on center in each of two staggered rows. Plants shall be a minimum of six feet tall at the time of planting, or, if the Board so approves:
A. 
A solid fence of naturally durable material, such as cedar, cypress or redwood, not less than five feet tall and open to the ground not more than four inches above ground level; or
B. 
A landscaped earth berm not less than five feet in height.
All areas of any lot not occupied by buildings, pavement or other surfacing, or otherwise improved or used in accordance with an approved site plan or subdivision, shall be landscaped by the planting of grass and/or ground cover, shrubs and trees. As a minimum, one tree shall be provided or remain existing for each 5,000 square feet of area, or fraction thereof, to which this requirement applies. The placement of the plant material shall be appropriate to enhancement of the property. Continuous maintenance shall be practiced on all such areas.