In all projects proposed or required to provide landscaping as part of the development plan, the landscaping shall be provided pursuant to the provisions in this Chapter.
(A)
Applicability. These standards shall apply to all new development and major additions or renovations of existing properties/structures or existing properties in the City, including any construction, expansion, or improvement on private property which requires the issuance of a building permit or other approval by the City, except business licenses. This Chapter shall not apply to the following:
(1)
Registered local, State or Federal historical sites;
(2)
Open space, ecological restoration, or habitat areas that do not require a permanent irrigation system;
(3)
Mined-land reclamation projects in the MRE zone that do not require a permanent irrigation system; or
(4)
Existing plant collections, as part of botanical gardens and arboretums open to the public.
(B)
Landscape and Irrigation Plan and Review Process.
(1)
All landscaping shall conform to the provisions of PMC Chapter 14.04 (Joshua Tree and Native Desert Vegetation Preservation).
(2)
Projects Subject to the Water Efficient Landscape Ordinance. Landscaping that meets the applicability criteria specified within PMC § 14.05.030 (Applicability) shall comply with the provisions of PMC Chapter 14.05 (Water Efficient Landscape) and the City Landscaping Design Standards. A landscape and irrigation documentation package shall be prepared and approved pursuant to PMC Chapter 14.05 (Water Efficient Landscape).
(3)
All Other Landscape Projects.
(b)
Landscape and Irrigation Plan. A landscape and irrigation plan shall be submitted to the City Engineer in conjunction with site improvement plans. The plans shall show the exact location of and irrigation for trees, shrubs, and ground cover. The landscape plan shall include, at a minimum, plant name, plant quantity, plant size, location of impervious surfaces, minimum landscape coverage and percentage live plant material, utilities and lighting, irrigation system, and plans for tree retention and removal where applicable. The landscape plan shall also include a water budget that includes the estimated water use (in gallons), the irrigated area (in square feet), precipitation rate, and flow rate in gallons per minute.
(4)
Landscape Plan Review Process. The following landscape plan review process shall be conducted in conjunction with review for the proposed action, pursuant to the requirements of Division 2 (Review Procedures) of this Title.
(a)
Review Authority. The Review Authority shall be the same as the Review Authority of the permit or approval sought for new projects or modifications to existing development.
(b)
Approval of Plans. The Review Authority shall review and approve the landscape and irrigation plan prior to issuance of grading or building permits for new projects or modifications to existing development.
(c)
Approval Required. The landscaping shall not be installed until the applicant receives approval of the landscape and irrigation plan by the Review Authority and the City Engineer, and any applicable permits have been issued.
(d)
Changes to Approved Plans. Changes to the approved landscape and irrigation plans that affect the character or quantity of the plant material or irrigation system design shall be resubmitted for approval before installation.
(C)
Irrigation and Water Efficient Landscape Standards. Required landscape areas shall be supported by a permanent, automatic irrigation system coordinated to meet the needs of various planting areas. Proper irrigation shall be provided for healthy plant growth and maturation, and shall be designed to avoid the watering of structures, public walkways, and pedestrian access areas.
A landscape documentation package prepared and approved pursuant to PMC Chapter 14.05 (Water Efficient Landscape) shall be required for any project that is subject to the procedures and standards set forth in that Chapter. For all other projects, the following shall apply:
(1)
Irrigation systems shall be designed to avoid runoff, excessive low head drainage, overspray or other similar conditions where water flows or drifts onto adjacent property, nonirrigated areas, walkways, roadways, or structures.
(2)
Low-volume irrigation systems with automatic controllers shall be required. Low-volume irrigation systems include drip emitters, bubblers, microsprinklers, and microsprayers utilizing polyethylene drip hose or PVC pipe. Spray heads shall be prohibited.
(3)
The irrigation system shall include an automatic antisiphon irrigation valve.
(4)
Irrigation systems shall be equipped with a meter or submeter and backflow preventer.
(5)
Automatic controllers shall be set to water between 7:00 p.m. and 10:00 a.m. to reduce evaporation.
(6)
An irrigation schedule indicating the four seasons of watering cycles is recommended for all irrigated landscape areas, and is required for those projects with a total landscape area of 2,500 square feet or more.
(D)
General Standards.
(1)
Landscape design shall conform to the applicable provisions of the General Plan and the City's Landscape Design Standards.
(2)
Common open spaces shall be landscaped pursuant to PMC Chapter 17.38 (Supplemental Standards for Multifamily Residential Development).
(3)
Plants shall be grouped according to their water needs and irrigated separately from other groupings to promote water efficiency.
(4)
Landscaping design shall consider solar heating and cooling techniques. Deciduous trees should be planted to the south and west of buildings, to provide summer shade and winter sunlight.
(5)
Graded, undeveloped portions of project sites proposed for future expansion shall be kept in a weed free condition and appropriate ground cover may be required for erosion control. Graded pad sites may require temporary seeding and irrigation for erosion control and to mitigate visual impacts.
(6)
Minimum Landscape Coverage and Live Plant Material. Setback areas shall be landscaped pursuant to the regulations set forth in the development standards for the applicable zone in Divisions 3 through 7 which establishes minimum landscape coverage and percentage of live plant material. Areas devoted to parking, driveways, and walkways are excluded from the calculation of minimum landscaped area. "Landscaping" shall mean any combination of live plant materials (trees, shrubs, vines, ground cover) and pervious nonplant materials (gravel, stones, decomposed granite, mulch, etc.). Live plant materials include ground cover, shrubs, and trees. The remainder of landscaped yard and setback areas may be rock, gravel, pebbles, stones, or similar natural nonliving, pervious material. Landscaped areas shall be top-dressed with rock, gravel, or an approved alternative. Bare dirt shall be prohibited. Synthetic turf may be counted toward the required minimum landscape coverage but does not count as live plant material.
(7)
Gravel, stones, decomposed granite, mulch, or other hardscape materials used in a parkway or along a pedestrian access shall be compacted or secured in such a way as to avoid spreading over any portion of a pedestrian path.
(8)
Decorative water features such as pools, ponds, and waterfalls used in landscaped areas shall recirculate water, shall use reclaimed water where available, and shall be designed and operated to minimize water loss.
(E)
Plant Types.
(1)
Except in the ER, LDR, SFR 1, SFR 2, and SFR 3 zones, all plants utilized in required landscape areas shall be from the City's approved planting list. In the ER, LDR, SFR 1, SFR 2, and SFR 3 zones it is recommended, but is not required, that required landscaping utilize the above-mentioned plant lists.
(2)
The following species are not allowed, except in the ER, LDR, SFR 1, SFR 2, and SFR 3 zones on properties developed before June 7, 2001:
(a)
Trees: Cottonwood (including Populus fremontii, P. trichocarpa, and P. tremuloides), eucalyptus, willows (Salix), Siberian elms (Ulmus pumila), tamarack (Larix occidentalis), and Arizona (Cupressus glabra) or Leyland cypress (Cupressocyparis leylandii); and
(b)
Shrubs and grasses: pampas grass (Cortadera selloana), and common Bermuda (Cynodon dactylon).
(3)
Drought-Tolerant and Native Species. Landscape planting shall incorporate at minimum 50 percent drought-tolerant and native species (especially along natural, open space areas), and shall be suitable for the soil and climatic conditions specific to the site.
(4)
Deep-Rooted Trees. Trees planted within 10 feet of a street, sidewalk, paved trail, parking area, or walkway shall be a deep-rooted species or shall be separated from hardscapes by a root barrier to prevent physical damage to public improvements.
(F)
Plant Size, Spacing, and Location. In order to achieve an immediate effect of a landscape installation and to allow sustained growth of planting materials, minimum plant material sizes, plant spacing, and minimum planter widths (inside measurements) shall be as follows:
(1)
Shrubs Size. All proposed shrubs except accent, color, or ground cover planting shall be a minimum five gallons in size, with a 15-gallon minimum size where required for screening. The minimum planter width for shrubs is three feet.
(2)
Trees Size. The minimum planting size for trees shall be 15-gallon, with 50 percent of all trees on a project site planted at a minimum 24-inch box size, and 20 percent of all trees on a project site planted at a minimum 36-inch box size or larger container. Trees required for screening shall be a minimum of 24-inch box size. Minimum planter width for trees shall be five feet.
(3)
Spacing. The spacing of trees, shrubs, and ground cover plants shall accommodate mature planting size. Where required for screening, spacing shall form an opaque barrier when planted.
(G)
Turf and Synthetic Turf. The following standards shall apply to all project landscaping with the exception of projects that must comply with PMC Chapter 14.05 (Water Efficient Landscape) or existing single-family residential development (see PMC § 17.37.010(G) (Landscaping)).
(1)
Turf areas shall be limited to activity or recreation areas.
(2)
Synthetic turf may be used as a substitute for natural turf for the purposes of water conservation, or in high activity or foot-traffic areas such as sports fields. The following standards shall apply to the use and maintenance of synthetic turf.
(a)
Synthetic turf shall consist of life-like individual blades of grass that emulate real grass in look and color and have a minimum pile height of one and one-half inches.
(b)
Synthetic turf used for pet areas shall be specifically formulated for that purpose.
(c)
A proper drainage system shall be installed underneath to prevent excess runoff or pooling of water.
(d)
Synthetic turf shall be installed and maintained to effectively simulate the appearance of a well-maintained lawn.
(e)
The use of indoor or outdoor plastic or nylon carpeting as a replacement for synthetic turf or natural turf shall be prohibited.
(f)
Tree root crowns shall be kept a minimum of five feet away from synthetic turf areas.
(g)
Synthetic Turf Maintenance Guidelines.
(i)
Synthetic turf shall be maintained free of moss, mold, algae, and fungi growth.
(ii)
Chemical agents or contaminated water shall not be applied to synthetic turf.
(iii)
A turf groomer shall be used to maintain the distribution of the infill material in the turf and to raise the turf fibers. Brushing should be performed every couple of weeks, raking of the turf should be performed once a month, and cleaning/sanitizing shall be performed once a year.
(H)
Landscape Installation. All plant materials, their location and spacing, and irrigation systems shall be installed and maintained pursuant to the City's Landscaping Design Standards or as otherwise approved by the City Engineer.
(I)
Landscape Maintenance. All landscaping shall be kept in an orderly condition, as follows:
(1)
Prior to the installation of landscaping in the public right-of-way the developer shall provide for the continued maintenance by entering into an agreement with the City;
(2)
Lawn and ground cover shall be trimmed or mowed regularly. All planting areas shall be kept free of weeds and debris. Bare spots in lawns or planters shall be promptly revegetated;
(3)
All plantings shall be kept in a healthy and growing condition. Fertilization, cultivation, and pruning shall be a part of regular maintenance. Good horticultural practices shall be practiced in all instances;
(4)
Plants shall be maintained free of disease and free of infestations of insects, animals, or other pests;
(5)
Irrigation systems shall be kept in working condition. Adjustments, replacements, repairs, and cleaning shall be a part of regular maintenance;
(6)
All significantly injured, decayed, or dead trees and other plant material shall be replaced within 30 days;
(7)
Trees and shrubs shall not overhang or encroach upon walkways, drives, parking areas, and traffic signs to the extent that they interfere with the use of these areas. Tree limbs which overhang public sidewalks shall be kept trimmed to a height of at least eight feet above the sidewalk level. Tree limbs which overhang the street shall be kept trimmed to a height of at least 13 feet above the street level;
(8)
In no case shall landscape areas be allowed to become overgrown. Examples of overgrown landscape materials include:
(a)
Lawn grass species: plants which have established seed heads, lawns that have become thatched and matted, have become infested with herbaceous weeds, or exceed eight inches in height;
(b)
Shrubs and decorative grasses: plants that have grown so large as to block natural light from entering windows, extend over property lines, extend over roof peaks or eaves, or are causing the strangulation of other plants; and
(c)
Trees: plants which display sucker growth, have grown to a height or canopy width which impairs the normal illumination of street lights, extend over property lines, interfere with overhead lines or impact public property;
(9)
Trees shall be staked and tied with lodge poles at the time of installation; and
(10)
Stakes and ties on trees shall be checked regularly for correct functions. Stakes and ties shall be adjusted to avoid creating abrasions or girdling on trunks or branches, and removed after trees are well-established.
(Ord. 1603 § 4 (Exh. I), 2023; Ord. 1613 § 4 (Exh. I), 2023)
