1. Parking lots with less than 20 spaces shall not be required to provide any interior landscaping with the exception of Neighborhood Commercial zones. All Neighborhood Commercial uses shall provide parking lot landscaping in accordance with this section and with the Parking Lot Landscaping Table 21.32.070, for 20-150 spaces, when providing any amount of parking less than 20 spaces.

2. Landscaping islands shall be placed at the end of every parking row with a maximum spacing of one (1) island for every 10 parking spaces. Islands shall be a minimum of 64 square feet measured from the edge of the landscaping. The placement of rain gardens and bioretention within these islands must meet the performance, design, and location requirements detailed in the Stormwater Technical Notebook, and minimum dimensions and plant spacing detailed in Table 21.32.070.

3. Trees shall be planted within interior landscape areas at a minimum of one tree per four parking stalls and shall be evenly spaced. See illustration below. When combined with rain gardens or bioretention, spacing shall be as detailed in Table 21.32.070.

4. Permanent curbs or structural barriers/dividers shall enclose planting areas; however, gaps or breaks in the barriers are acceptable at locations where surface water conveyance is desired. When gaps or breaks in the barrier occur, they shall be spaced no less than 6 feet on center.

5. Trees may be planted no closer than four feet from pavement edges where vehicles overhang planted areas.

6. Wheelstops and/or curbs shall be installed to prevent vehicles from overhanging landscaping islands.

7. Narrow parking lot islands or peninsulas and planting strips should not be planted in grass because of potential problems with maintenance. Location of larger parking spaces adjacent to islands is suggested to reduce damage to plant materials.

8. Parking lot perimeter landscaping shall be measured from the property line.