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35 <br /> (a) All shrubs shall be cold hardy and heat tolerant. <br /> (b) Upright shrubs shall be a minimum of 15 inches in height at the time of <br /> planting. <br /> (c) Shrubs shall not be planted closer than three feet on center. Shrubs shall <br /> not be planted closer than three feet to planted trees, nor within six feet <br /> of existing protected trees; however, no more than 25% of the root <br /> protection zone of an existing tree may be disturbed with new plantings. <br /> (d) When planted as a hedge, the maximum spacing for 24-inch high <br /> deciduous shrubs shall be 36 inches on center. Spacing for other size <br /> shrubs shall be determined by the Planning Director or designee based <br /> on the proposed species. <br /> (4) Preferred Species <br /> The Planning Director shall maintain a list of plants by type and their preferred <br /> location or use on sites developed under this Section. The list shall include <br /> drought tolerant and native species <br /> (5) Prohibited Plants <br /> The Planning Director shall maintain a list of plants that are not permitted for any <br /> use due to their invasive tendencies. Such species shall not be planted as <br /> landscaping for any purpose. <br /> (D) Installation <br /> (1) The International Society of Arboriculture (ISA) maintains standards for tree <br /> plantings. All installations shall adhere to the standards published by the ISA. <br /> The Planning Director will have available the planting details as a booklet. <br /> (E) Maintenance <br /> (1) All plantings must be maintained in a healthy state. Should any vegetation that <br /> was required to meet the standards of this section die within two years of <br /> planting, the plants must be replaced with the same or comparable species. <br /> (2) The Planning Director may conduct inspections to monitor the health and status <br /> of the required landscaping. <br /> 6.8.6 Landscape Use Buffers <br /> (A) Purpose <br /> Landscape use buffers are intended to screen and buffer lower intensity/density uses <br /> from incompatible higher intensity/density land uses. Buffers reduce adverse visual <br /> effects, as well as noise, dust, and odor. <br /> (B) Applicability <br /> Landscape use buffers will be required based on the zoning district of the proposed use <br /> and the zoning district of the adjacent uses. <br /> (C) Location <br /> (1) Required landscape use buffers shall be located along the interior or street lot <br /> lines nearest the adjacent streets, Iand uses and/or zoning designations. Buffers <br /> shall not be located on any portion of an existing or proposed street right of way, <br /> drainage or utility easement unless allowed by an encroachment agreement with <br /> the owner of that easement. <br /> (2) No building or structure of any type shall be erected, constructed or installed in a <br /> required landscape use buffer. <br /> (D) Land Use Buffer Table <br />