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Article 6: Development Standards 278 Section 6.8: Landscaping, Buffers&Tree Protection (a) All shrubs shall be cold hardy and heat tolerant. (b) Upright shrubs shall be a minimum of 15 inches in height at the time of planting. (c) Shrubs shall not be planted closer than three feet on center. Shrubs shall not be planted closer than three feet to planted trees, nor within six feet of existing protected trees; however, no more than 25% of the root protection zone of an existing tree may be disturbed with new plantings. (d) When planted as a hedge, the maximum spacing for 24-inch high deciduous shrubs shall be 36 inches on center. Spacing for other size shrubs shall be determined by the Planning Director or designee based on the proposed species. (4) Preferred Species The Planning Director shall maintain a list of plants by type and their preferred location or use on sites developed under this Section. The list shall include drought tolerant and native species (5) Prohibited Plants The Planning Director shall maintain a list of plants that are not permitted for any use due to their invasive tendencies. Such species shall not be planted as landscaping for any purpose. (D) Installation (1) The International Society of Arboriculture136 (ISA) maintains standards for tree plantings. All installations shall adhere to the standards published by the ISA. The Planning Director will have available the planting details as a booklet. (E) Maintenance (1) All plantings must be maintained in a healthy state. Should any vegetation that was required to meet the standards of this section die within two years of planting, the plants must be replaced with the same or comparable species. (2) The Planning Director may conduct inspections to monitor the health and status of the required landscaping. 6.8.6 Land Use Buffers (A) Purpose Land use buffers are intended to screen and buffer lower intensity/density uses from incompatible higher intensity/density land uses. Buffers reduce adverse visual effects, as well as noise, dust, and odor. (B) Applicability Land use buffers will be required based on the zoning district of the proposed use and the zoning district of the adjacent uses. (C) Location (1) Required land use buffers shall be located along the interior or street lot lines nearest the adjacent streets, land uses and/or zoning designations. Buffers shall not be located on any portion of an existing or proposed street right of way, drainage or utility easement. (2) No building or structure of any type shall be erected, constructed or installed in a required land use buffer. 136 Correct misspelling. Orange County, North Carolina—Unified Development Ordinance Page 6-41