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25 <br /> accepted horticultural practices shall be used to protect the <br /> root zones of all retained existing plant material during <br /> construction and also during underground utility <br /> installation (refer to Article 12.2. 1) . All new landscaping <br /> shall be of good quality and installed in a sound, <br /> workmanship-like manner and according to the following <br /> planting procedures: <br /> a. Planting holes should be dug at least one-third (1/3) <br /> larger than the root ball. (See Figure 12.3 and Figure <br /> 12.4) <br /> b. Plants shall be planted in their permanent location <br /> immediately upon delivery to the site. It is not <br /> necessary to remove the burlap, but the strings from <br /> around the stem of the plant must be removed and the <br /> burlap should be folded from the top 1/3 of the ball <br /> after the plant is in the hole. The soil around the <br /> plant should be tamped to remove air pockets. Mulching <br /> with a good mulch 3-4" deep to help retain moisture is <br /> mandatory. (See Figure 12.3 and Figure 12.4) <br /> c. Trees which have heavy tops or which are over six (6) <br /> feet in height shall be staked to prevent winds from <br /> loosening the roots. (See Figure 12 .5 and Figure 12.6) <br /> d. All plants shall be soaked thoroughly with water at <br /> planting time and once a week (unless soaking rains <br /> occur) thereafter during the first growing season. <br /> e. All new plant material should meet or exceed the <br /> standards set forth in the American Standard for Nursery <br /> Stock by the American Association of Nurserymen (AAN) . <br /> Parked vehicles may overhang a landscaped area no more than <br /> two and one-half (2 1/2) feet, provided curbing or other <br /> wheel stops are installed to insure no greater overhang or <br /> penetration of the landscaped area. Landscaping, walls, <br /> fences, and other material shall be so located as to prevent <br /> its damage and/or destruction by overhanging vehicles. <br /> The type of landscape material to be used in meeting the <br /> requirements of this Article is at the option of the owner or <br /> developer but shall be appropriate for this climate and for <br /> the specific location of the plant on the site. Around <br /> parking/vehicular use areas, avoid tall shrubs and low <br /> branching trees that will restrict visibility. <br /> Tables 12. 1 through 12.6 provide a listing of acceptable <br /> plant materials which are adapted to the local climate and <br /> soil conditions. Use of native plant materials is <br /> encouraged. No synthetic plant materials may be used to <br /> satisfy the landscaping requirements. <br /> At installation, trees shall be not less than six (6) feet <br /> tall; with a caliper of three fourths (3/4) to one and one- <br /> fourth 11 1/4) inches. Shrubs should not be less than <br /> fourteen (14) inches high. Horticulturally and aesthetically <br />