The applicant shall indicate on the preliminary landscape plan the types of planting to be provided in each area of the site, including the specific tree, shrub, and ground cover types, locations, and sizes; and planting specifications. The types of planting shall be consistent with the following definitions of planting types:
A. Type I Planting – Solid Screen.
1. Type I planting is intended to provide a solid sight barrier.
2. Type I planting shall consist of evergreen trees a minimum height of six feet at planting, and evergreen shrubs which will provide an eighty percent sight-obscuring screen at the time of planting; or a combination of sixty percent evergreen/forty percent deciduous trees and sixty percent evergreen/forty percent deciduous shrubs, backed by one hundred percent sight-obscuring decorative wall or fence.
3. The width of the barrier shall be a minimum of five to twenty feet as set out in MMC 22.46.050, unless otherwise specified by the zoning administrator.
4. Landscape strips fifteen feet or less in width: one tree required for every fifteen to twenty linear feet depending on the type of tree proposed.
5. Landscape strips greater than fifteen feet: one tree for every one hundred fifty square feet.
6. Shrubs: one shrub for every twenty square feet.
7. Ground cover on centers to cover the ground within two years.
B. Type II Planting – Visual Screen.
1. Type II planting is intended to create a visual separation that is not necessarily one hundred percent sight-obscuring.
2. Type II planting shall be evergreen or a mixture of evergreen and deciduous trees with large shrubs and ground cover interspersed with the trees, and/or a decorative wall or fence. Type II planting shall include a minimum of sixty percent evergreen trees and evergreen shrubs. The width of the barrier shall generally be at least five to fifteen feet, unless otherwise specified by the zoning administrator.
3. Landscape strips fifteen feet or less in width: trees required an average of twenty to thirty feet on center depending on the type of tree proposed.
4. Landscape strips greater than fifteen feet: one tree for every three hundred square feet.
5. Shrubs: one shrub for every twenty-five square feet.
6. Ground cover on centers to cover the ground within two years.
C. Type III Planting – Low Cover.
1. Type III planting is intended to provide visual interest, to complement other plant materials, and for erosion control.
2. Type III planting shall consist of a mixture of evergreen and deciduous shrubs, and/or ground cover, and/or perennial or annual flowers to provide a fifty percent covering of the entire planting area at the time of planting.
D. Type IV Planting – Open Area Planting.
1. Type IV planting is intended to provide visual interest and shade in large open areas, particularly parking lots.
2. Type IV planting shall consist of trees planted with supporting shrubs and ground cover. Lawn may be substituted for ground cover where the width of the planting area exceeds ten feet in the narrowest dimension. Evergreens can be used where sight distance allows. Up to one hundred percent of the trees proposed for a parking area may be deciduous.
3. One tree required for every three hundred square feet.
4. Shrubs: one shrub for every twenty-five square feet.
E. Type V Planting – Wildlife Corridor.
1. Type V plantings are intended for wildlife corridors. Type V planting shall consist of trees, shrubs, and ground covers that are native to the Puget Sound and are appropriate to the conditions of the site.
2. Wildlife corridors shall be maintained, enhanced, and replanted where appropriate, based on the type of habitat in the general vicinity.
3. Wildlife corridors of woodland, wetland, and stream habitat shall be maintained or enhanced with native materials that provide habitat and cover for woodland, wetland, and stream wildlife species.
4. Invasive species shall be removed from these areas and replaced with appropriate native plantings.
5. Size and number of plantings shall be determined at the time of plan development depending on site needs and conditions. Plantings shall typically consist of infilling with native deciduous and/or evergreen trees, understory shrubs, and native ground cover.
(Ord. 005/2019 § 10 (Exh. B))