Approved landscape plans shall be implemented as soon as weather allows after completion of construction, which will provide planting which, either separately or combined with wood fencing or earthen berms, provide visual screening of parking areas, trash areas, and other service areas of the development. Additionally, landscaping tends to break up the visual impact of the development from public roads and neighboring properties. Further, landscaping may contribute to the control of obnoxious weeds. Landscaping must be maintained to assure viability of plantings; underground or other timed outdoor water systems may be required by the administrator for water conservation.