(a) At least one major deciduous shade tree, not less than two and one-half inches caliper measured three feet above the ground at the time of planting, shall be provided within each parking area for every 3,000 square feet of paved area or every ten parking spaces, whichever is greater. The trees shall be spaced evenly throughout the lot interior to provide shade and reduce glare. In all off-street parking areas containing twenty-five or more parking spaces, at least ten percent of the interior of the parking area shall be curbed and landscaped with trees, shrubs, and other plants.
(b) Raised planting islands at least eight feet in width for double loaded islands or six feet for single loaded islands shall be provided to guide vehicle movement and to separate opposing rows of parking spaces so as to provide adequate space for plant growth, pedestrian circulation, and vehicle overhang. Such raised planting islands and the landscaping within them shall be designed and arranged in such a way as to define major circulation aisles, entrances, and exits, to channel internal traffic flow, to prevent indiscriminate diagonal movement of vehicles, and to provide relief from the visual monotony and shadeless expanse of a large parking area.
(c) Curbs of such islands shall be designed to facilitate surface drainage and prevent vehicles from overlapping sidewalks and damaging the plants.
(d) All islands and screens (see Section 1355.06) shall be landscaped with trees, shrubs, grasses, and/or ground covers. The materials selected for the landscaped overhang area must be of suitable height and hardiness for the size and use of the area. Species selected shall be tolerant of urban conditions and deicing agents. All new plant materials shall be consistent and compatible with the existing vegetation of the site and the surrounding area. Plant materials judged to be inappropriate by the Planning Administrator or Planning Commission will not be approved.
(e) Maintenance and responsibility. All planting shown on an approved site development plan or special permit plan shall be maintained by the property owner in a vigorous growing condition throughout the duration of the use. Plants not so maintained shall be replaced with new plants at the beginning of the next immediately following growing season.