All plants shall receive sufficient water to assure their survival. Landscaping that can be supported by natural precipitation patterns to encourage the conservation of water. Automatic irrigation systems are required for all landscaped areas required by this title unless a landscape architect, certified nurseryman, or certified landscaper certifies that the proposed landscaping consists of native or other suitable vegetation which is capable of surviving without supplemental irrigation. Irrigation systems shall make provisions for winterization. Irrigation water, whether manually applied or applied through an irrigation system, shall be applied with the goals of avoiding runoff and overspray. An irrigation plan and schedule shall be included as part of the required landscape plan.