A landscape plan prepared by a certified landscape architect shall be submitted with each non-residential land development, residential subdivision, planned residential developments, and open space cluster developments site plan application. The plan shall identify existing and proposed trees, shrubs, ground cover, natural features such as rock outcroppings, and other landscaping elements. The plan should show where they are or will be located and planting and/or construction details. When existing natural growth is proposed to remain, the applicant shall include in the plans proposed methods to protect existing trees and growth during and after construction.