All areas within the required building and parking setback, excluding driveway openings, shall be landscaped. The following minimum plant materials shall be provided and maintained on all lots or developments except lots devoted to singe-family detached and two-family dwellings.
(a) Three major shade trees shall be provided for every 100 linear feet of lot frontage or fraction thereof, not including drive entrances. Each tree, at the time of installation, shall have a clear trunk height of at least 6 feet and a minimum caliper of 2 inches.
(b) Twenty shrubs shall be provided for every 100 linear feet of lot frontage or fraction thereof, not including drive entrances.
(c) All areas not devoted to trees and shrubs shall be planned with grass, ground cover or other live landscape treatment, excluding paving or gravel.
(d) Trees and shrubs may be aggregated appropriately.
(e) Whenever the building setback is five (5) feet or less, these requirements shall not apply.