Landscape Maintenance Specifications. Contractor shall perform complete landscape maintenance and improvements of all contract areas identified in Section 13 of these Specifications (Contract Sites) within the Tierrasanta Maintenance Assessment District (MAD), including, but not limited to, the following: irrigation, pruning, shaping and training of trees, shrubs, turf, and groundcover plants; fertilization; litter control; weed control; control of all plant diseases and pests; mowing; edging; renovation and aeration; sweeping; and all other maintenance required to maintain the Contract Sites included in this Exhibit B in a safe, attractive and useable condition and to maintain the plant material in good condition with horticulturally acceptable growth and color.