ATTACHMENT B_City of Boulder Landscaping Manual DRAFT POST CC 2nd Reading 12.2

City of Boulder Landscape Manual Key Issues

City

Applicability [ADOPTION DATE] – Private vs. Public ROW/Parks; CIP vs. development projects Table of Contents Definitions .......................................................................................................................3 Section 1. Introduction...................................................................................................6

Section 2. Goals and Purpose of this Manual..............................................................6 Section 3. What Rules Apply to Landscaping and Irrigation Systems......................7 Section 4. Applicability and Process ............................................................................7 Section 5. Soil and Mulch Specifications .....................................................................8 5.1 Soil Preparation and Amendments .........................................................................8 5.2 Mulch Standards .....................................................................................................8 Section 6. Turf, Plant, and Tree Specifications..........................................................10 6.1 Turf Requirements ................................................................................................10 6.2 Tree and Plant Selection.......................................................................................11 6.3 Tree Preservation and Protection .........................................................................12 Section 7. Wildland Urban Interface (WUI) Landscape Area Standards..................12 Section 8. Water Conservation and Efficiency Standards........................................14 8.1 Water Use Rules ...................................................................................................14 Section 9. Irrigation Standards....................................................................................15 Section 10. Landscaping Maintenance Standards ....................................................16

Definitions In the event of any conflict of these definitions with the Boulder Revised Code, the applicable definition in the Boulder Revised Code shall apply. Updates to definitions relative to the Colorado Revised Statutes that are inconsistent with applicable definitions below shall also take precedence over these definitions.

Compost: Fully finished, stabilized, and mature organic material derived from sources such as leaves, grass clippings, organic food waste, wood chips, and other yard wastes. Finished compost is dark, crumbly, earthy in smell, and does not resemble the original feedstock materials. Control valve or station: A device that regulates the flow of water within an irrigation system.. Defensible space: An area that has been modified and is maintained to reduce fire risk, intensity, and spreading by disconnecting fuel loads both vertically and horizontally. In this area, natural and manmade fuels are treated, removed, and reduced to slow the spread of wildfire and alter fire behavior. This definition has the same meaning as in Chapter 8.5, “Wildland Code,” B.R.C. 1981 of Title 10, Structures. Drip irrigation: A low-pressure irrigation method that delivers water directly to the soil through drip emitters, including micro-spray systems. Establishment or establishment period: The time required for a plant to seed, germinate, and develop a healthy root system, which promotes long-term health and growth. Hardscape: A landscape feature constructed of durable pervious or impervious materials. Hydrozone: A portion of the irrigated landscaped area in which plants with similar water needs are grouped and served by the same irrigation valve or set of valves with the same irrigation schedule. Landscape plan: Landscaping and irrigation design plans that meet all requirements of this manual and submitted to the City of Boulder for review and approval prior to landscaping and irrigation work being completed. Landscape rock: Loose rock material greater than ¼ inch in sized used as an aesthetic or functional element, such as a path or downspout splash block. Landscaped area: Any land allotted to living landscape planting materials, and includes, without limitation, landscape rock and hardscaped areas— such as arcades, plazas, patios, seating areas, courtyards, non-combustible zone areas in the wildland urban interface (WUI), or pedestrian pathways— when designed to be integrated with

the landscaping, of which fences and walls and seating areas may be a part. Landscaped area does not include building footprints, driveways, vehicular circulation, non-irrigated portions of lots, and decks. Master valve: The valve that controls water flow for the entire irrigation system. Mulch: Non-living organic or inorganic material, such as chipped wood or rock material ¼ inch or less, applied in a loose condition to retain moisture, suppress weeds, and improve soil quality. Noxious weed: A Plant or parts of a plant that have been designated by rule as being noxious or has been declared a noxious weed designated by Colorado state regulations as being a state Noxious Weed, and meets one or more of the following criteria: (a) located in a recreational use area or other space that is regularly used for civic, community, or recreational purposes, which may include a playground, a sports field, a picnic ground, an amphitheater, a portion of a park, and the playing area of a golf course, such as a driving range, chipping and putting green, tee box, green, fairway, and rough; or (a) Aggressively invades or is detrimental to economic crops or native plant communities; (b) a component of a product designed and approved by a professional engineer for civil infrastructure projects, including but not limited to: (i) covers for solid waste facilities and brownfield sites; and (ii) revetments for slopes, channels, levees, and dams. (b) Is poisonous to livestock; (c) Is a carrier of detrimental insects, diseases, or parasites; (d) The direct or indirect effect of the presence of this plant is detrimental to the environmentally sound management of natural or agricultural ecosystems. Overspray: Irrigation water that is delivered beyond the target/intended area. Runoff: Water that is not absorbed by the soil or landscape to which it is applied and flows from the area. Sprinkler/overhead irrigation: An irrigation method that distributes water through the air using devices such as spray heads, rotors, or pop-ups. Temporary irrigation: A temporary watering system designed to transport and distribute water to landscape plants. Tree ring: A circular mulched area around a tree trunk.

Turf, non-functional: Non-functional turf is turf that is not functional turf. Turf, artificial: functional artificial turf is turf that is: "artificial turf" means an installation of synthetic materials developed to resemble natural grass. Turf, functional artificial: Functional artificial turf is means artificial turf that is: (a) located in a recreational use area or other space that is regularly used for civic, community, or recreational purposes, which may include a playground, a sports field, a picnic ground, an amphitheater, a portion of a park, and the playing area of a golf course, such as a driving range, chipping and putting green, tee box, green, fairway, and rough; or (b) a component of a product designed and approved by a professional engineer for civil infrastructure projects, including but not limited to: (i) covers for solid waste facilities and brownfield sites; And (ii) revetments for slopes, channels, levees, and dams. Turf, non-functional artificial: Artificial turf that is not functional artificial turf. Turf, functional: Functional turf is turf that is located in a recreational use area or other space that is regularly used for civic, community, or recreational purposes, which may include a playground, a sports field, a picnic ground, an amphitheater, a portion of a park, and the playing area of a golf course, such as a driving range, chipping and putting green, tee box, green, fairway, and rough. Turf: Turf is continuous plant coverage consisting of nonnative grasses or grasses that have not been hybridized for arid conditions and which, when regularly mowed, form a dense growth of leaf blades and roots. Wildland Urban Interface (WUI): The area of the city that is subject to the International Wildland Urban Interface Code (IWUIC) and local amendments of Chapter 8.5, “Wildland Code,” B.R.C. 1981. Zone, Home Ignition: The structure and the surrounding area that influences the potential for ignition during a wildfire, including the quality of defensible space. Zone, Irrigation: Typically, an area served by a single control valve, sometimes referred to as a “station.” Zones are comprised of plant materials and soil types with similar water requirements.

Section 1. Introduction The City of Boulder Landscape Manual establishes standards for landscaping and irrigation system installation, design, maintenance, and management in the city of Boulder for governmental agencies, design professionals, private developers, community groups, property managers, and homeowners for new development and redevelopment projects. These standards promote sustainable, attractive, colorful, and diverse landscapes and efficient use of water within the city. These standards also balance the goals of expanding the city’s tree canopy for a number of environmental benefits including but not limited to stormwater runoff reduction, carbon sequestration, energy savings and mitigating the urban heat island while also ensuring that only approved plants and trees are planted and maintained that are wildfire resistant or have low flammability to deter the spread of wildfires into the city. This manual establishes requirements in conjunction with the Boulder Revised Code provisions on water use, wildfire mitigation, and landscaping quality, and with the Design and Construction Standards for public rights-of-way. The manual also advances and enforces the objectives of the city’s Water Efficiency Plan and Community Wildfire Protection Plan.

Section 2. Goals and Purpose of this Manual The goals and purpose of this manual are outlined in Section 9-9-12, “Landscaping and Screening Standards,” B.R.C. 1981. Overall, quality and efficient landscaping is intended to enhance the visual appearance of developments, ensure healthy resilient landscapes, and mitigate urban heating resulting from development and surface treatments. This manual is also intended to prevent and deter the spread of wildfire through use of fire resistant and low flammability vegetation and maintenance practices that may include the removal of high-risk vegetation and avoiding plantings near structures in areas of the city that are at high risk for wildfire spread. Lastly, this manual is intended to promote the efficient use of water resources in the landscape to support long-term sustainability of the city’s water supply and improve drought resilience.

Section 3. What Rules Apply to Landscaping and Irrigation Systems (A) Landscaping shall be installed and maintained in accordance with the following, in order of compliance: 1) The Boulder Revised Code, specifically, the city of Boulder landscaping regulations of Section 9-9-12, “Landscaping and Screening Standards,” B.R.C. 1981, Section 9-9-13, “Streetscape Design Standards,” B.R.C. 1981, and Section 9-9-14, “Parking Lot Landscaping Standards,” B.R.C. 1981, this supplement manual; 2) The city of Boulder Design and Construction Standards (DCS) in the public right-of-way; 3) This manual; and 4) The Boulder Approved Tree and Plant List referred to in Section 6.2 below. (B) Compliance with all of the requirements of this manual shall be demonstrated on any required landscape and irrigation plans. This manual covers specifications on: 1) Soil and Mulch; 2) Turf, Trees, and Plants; 3) Wildfire Resistance and Defensible Space; 4) Water Conservation and Efficiency; 5) Irrigation Requirements; and 6) Landscaping Maintenance.

Section 4. Applicability and Process (A) A landscape and irrigation plan are required for any building permit associated with new development or redevelopment on private property meeting the requirements of Section 9-9-12(b), “Landscaping and Screening Standards,” B.R.C. 1981. (B) Landscape plans may also be required pursuant to any project being reviewed pursuant to Section 9-2-14, “Site Review,” B.R.C. 1981, or Section 9-2-16, “Form-Based Code Review,” B.R.C. 1981.

Section 5. Soil and Mulch Specifications 5.1 Soil Preparation and Amendments (A) Site preparation and all planting shall be completed, at a minimum, in accordance with the City of Boulder Design and Construction Standards. Site preparation in any development shall include tilling the soil to a minimum depth of six inches below the finished grade, together with soil amendments, including, without limitation, compost, and manure that are appropriate to ensure the health and sustainability of the landscaping to be planted.

5.2 Mulch and Landscape Rock Standards (A) Purpose: The objective of mulch is to improve water retention, reduce weeds, reduce heat in the landscape, improve soil structure, and improve plant health. Mulches appropriate for use in the Wildland Urban Interface also reduce the potential for the spread of fire in the landscape. (B) Landscape Rock: Landscape rock greater than ¼" in size is permitted as a decorative and ornamental feature in landscape areas but, is not considered a mulch that supports plant and root growth. See Subsection (I) below for allowable squeegee mulch for planting areas. Landscape rocks larger than 3 inches in diameter are not permitted in the public right-of-way or within 18 inches of sidewalks. (C) Mulch Requirements: Table 5-1 specifies information on mulch choice by application throughout the city, including WUI Ignition Areas, Home Ignition Zones, and irrigation types. Table 5-1 - Mulch Use Requirements and Recommendations Matrix Mulch Type (all loose material mulches to be installed 3” deep) Inorganic: Squeegee (1/4” or less angular gravel with no fines) Organic: Aged Arbor Chip Mulch (1”- 1 ½ “ max particle size)

WUI Requirements

Planting Use Recommendations

Irrigation Type Compatibility

Home Ignition Ignition Tree Rings Risk Areas Zones

Native Plants

Drip Irrigation

Spray Irrigation

Allowed in Allowed in all areas all zones

No

Yes, improves soil for natives

Yes

No

Allowed in Prohibited all areas in zone 1

Yes, improves tree health

Yes

Yes

Yes

Mulch Type (all loose material mulches to be installed 3” deep)

WUI Requirements

Planting Use Recommendations

Home Ignition Ignition Tree Rings Risk Areas Zones

Organic: Other wood mulches such Prohibited Prohibited as cedar bark, or in all areas in all zones shredded gorilla hair Living: Short Native Colorado Grasses Allowed in Prohibited or Low Creeping all areas in zone 1 Groundcovers

Irrigation Type Compatibility

Native Plants

Drip Irrigation

Spray Irrigation

Yes

Yes

Yes

Yes

Yes

Yes

No

Yes

(D) Permitted mulches in the WUI: The following mulches are permitted in the WUI: 1) Organic: Arbor Chip Mulch - 1”- 1-1/2” max particle size with mixed sources (small sticks, leaves, bark, and wood chipped) aged in a pile to increase water retention properties. 2) Inorganic: Squeegee - 1/4” angular gravel no fines. This mulch is acceptable in areas where non-combustible, in-organic mulch is required. WUI Ignition Area, Home Ignition Zone 1 (see Chapter 8.5, “Wildland Code,” B.R.C. 1981 of Title 19, Structures.). 3) Living: Short Native Colorado Grasses or Creeping Groundcover - Lowgrowing, low water use native grass and forb mixes. (E) Prohibited mulches: Recycled rubber, other synthetic petroleum-based products, pine straw, or dyed mulches for landscape use are prohibited. (F) Mulch depth: Maintain a minimum depth of 3 inches of mulch in planting beds, with careful placement and adjustment of depth near plant stems as needed to allow unimpeded plant establishment and vigorous growth. (G) Tree rings: Tree rings shall be provided for all trees by the applicant or property owner. Tree rings for evergreen trees shall extend to the dripline of the tree (H) Mulch installation: Mulch shall be installed such that the top of the mulch is flush with the top of the curb, sidewalk, edging or sod that it is adjacent to. (I) Squeegee Mulch: If inorganic mulch is to be used, squeegee mulch (angular gravel less than 1/4” in size with no fines) shall be used (not landscape rock as described above) within areas of the landscape area for plantings as it

supports improved root growth, denser plantings, increased water retention for long term plant health, and reduced surface-level temperatures.

Section 6. Turf, Plant, and Tree Specifications 6.1 Turf Requirements (A) Restricted turf: The following grasses are restricted to functional turf areas: 1) Cool season non-native turf grasses 2) Kentucky Bluegrass, including blends and hybrids 3) Tall Fescue 4) Fine Fescue 5) Perennial Ryegrass 6) Texas Hybrid Bluegrass 7) Hybrids of the species above, including those selected for “drought” or “heat” tolerance 8) Cold hardy Bermudagrass (B) Non-restricted turf: The following turf grass species do not have restrictions: 1) Native and climate adapted grasses 2) Buffalograss 3) Blue grama grasses 4) Buffalograss/blue grama grass mixtures 5) Native shortgrass prairie mixtures 6) Other native and low water use grasses, including mixes (C) Additional turf requirements: Turf shall be installed in accordance with the following requirements by land use: 1) Non-functional turf is prohibited in new development on lots or parcels with the following uses of land: a) On residential lots or parcels with more than three dwelling units; b) Business, Mixed use, and Industrial properties, c) Within any public rights-of-way and multi-use paths, and d) New common areas within common interest communities. 2) Functional turf is only permitted in recreational areas such as parks, ballfields, within cemeteries, or on residential lots as specified in paragraph (3) below. 3) Residential lots with three dwelling units or less shall have no more than 25% of the lot or parcel areas or 1,000 square feet, whichever is less, as turf. 4) Restricted turf grass per paragraph (A) shall not be used in landscaped areas with any one dimension less than ten feet in width.

5) Restricted turf grass per paragraph (A) shall not be planted on slopes or berms at a 4:1 slope or greater. 6) Artificial turf is prohibited in all new development, unless considered functional artificial turf. (D) Landscaping installed prior to March 1, 2026 may be maintained and is not required to comply with these provisions, unless any project or modifications to the site requires compliance with these standards per state law, the Boulder Revised Code, or Section 4 of this manual.

6.2 Tree and Plant Selection (A) Minimum Overall Site Landscaping: A minimum of one tree and five shrubs on a lot or parcel are planted for each 1,500 square feet of lot area not covered by a building or parking. (B) New trees and plants shall be selected from and meet the minimum size

requirements of the Boulder Approved Tree and Plant List. (C) Whenever a landscape plan is required, proposed tree and plant selection and specifications shall be outlined on all landscape plans meeting the application requirements of Section 9-9-12, “Landscaping and Screening Standards,” B.R.C. 1981 and shall include water requirements and USDA hardiness zone information. (D) Alternative plant material that is proposed that is not on the Boulder Approved Tree and Plant List must be submitted for approval of the city manager, demonstrating that the alternative plant is adaptable to the local environment and capable of naturalizing, and consistent with the intent of this manual. Documentation that it is low water use and fire-resistant shall be based on two sources. The city manager shall keep a running list of requested alternative plant materials to determine if the tree and plant list should be updated to include the alternative plant as an approved plant. (E) Planting areas for urban agriculture and food production of annual crops shall be identified on the landscape plan. Planting plans for crops are not required. For perennial crops, identify fruit trees and perennial crops on planting plans and submit documentation for review of the chosen varieties. (F) Native seed establishment shall meet uniform coverage and gap (two feet by two feet) criteria with low weed content (seventy (70) percent Native Grasses to twenty (20) percent weeds, or better). (G)Removing water-wise plant materials to convert back to cool-season turfgrass in a manner inconsistent with this manual is not permitted. (H) Selected plant material shall be nursery-grown in accordance with proper horticultural practice and the National Standard for Nursery Stock (ANSI Z60.1).

Plants shall be healthy, well-branched vigorous stock with a growth habit normal to the species and variety, free of disease, insects, and injuries. (I) Noxious Weeds: All landscape plans must comply with the current state weed and nursery lists, including the State of Colorado Rules Pertaining to the Administration and Enforcement of the Colorado Noxious Weed Act.

6.3 Tree Preservation and Protection (A) All existing trees six inches or more in caliper and located in any development in the required setback or on the property line shall be protected from construction impacts, unless the tree is a noxious weed. Trees over six inches in caliper shall be protected from construction impacts within the dripline of the tree in a manner that is consistent with the City of Boulder Design and Construction Standards' tree protection for construction site standards.

Section 7. Wildland Urban Interface (WUI) Landscape Area Standards (A) Applicability: This section serves as a single consolidated reference point for lots and parcels that are in the Wildland Urban Interface (WUI) as mapped in the Wildland Urban Interface Area Map. (B) Changes to soil, mulch, turf, plants, and trees on WUI lots and parcels shall be consistent with the following: 1) Landscape Materials and Tree and Plant List: New plant materials shall be selected from the Boulder Approved Tree and Plant List and planted in sufficient quantity to completely cover within five years of initial planting, all landscaped areas, including mulched areas, and under trees. Within the Wildland Urban Interface (WUI), a reduced plant density is permissible to deter wildfire spread. Existing plant material inconsistent with the Boulder Approved Tree and Plant List may be required for new construction per Chapter 8-5, “Wildland Code,” B.R.C. 1981. 2) Urban Agriculture and Annual Crops: Outside of the 0-foot to 5-foot noncombustible zone, planting areas for urban agriculture and annual crops are allowed notwithstanding any requirements that may exist within any easements..

(C) Summary of standards for WUI lots or parcels: Table 7-1 is a summary of key requirements that apply to new construction of buildings and structures, including decks, or changes to site landscaping on WUI lots or parcels. Improvements are required to comply with Chapter 10-8.5, “Wildland Code,” B.R.C. 1981, Section 9-9-12 “Landscaping and Screening,” Section 9-9-15, “Fences and Walls,” B.R.C. 1981, including, but not limited to these specific wildland standards, which are consolidated in this table for ease of reference and importance:

Table 7-1 – Summary of Wildland Code requirements Summary of Wildland Code Requirements (this summary is not exhaustive, but includes a summary of key elements found in and around site landscaping)

Specific Wildland Code Section

Junipers Due to the high risk of flammability and risk to life and property, no species of Section 10-8.5; Junipers (Juniperus spp) are allowed to be planted on or after August 1, 2025 603.2.6, Junipers Noncombustible zone: A five-foot area around a building or other structure having no vegetation and no combustible material. To reduce the risk of wildfire ignition on buildings and structures, a noncombustible zone, prohibits vegetation and other noncombustible materials in the 0-foot to 5-foot zone around the perimeter of any footprint of any new buildings or structures, including decks and additions to existing structures.

Section 10-8.5; 603.2.4, Noncombustible zone

Defensible space: An area that has been modified and is maintained to reduce fire risk, intensity, and spreading by disconnecting fuel loads both vertically and horizontally. In this area, natural and manmade fuels are treated, removed, and reduced to slow the spread of wildfire and alter fire behavior. To reduce the risk of wildfire spread on WUI lots or parcels, defensible space, an area 5 feet to 30 feet from the perimeter of any footprint of any new buildings or structures, including decks and additions to existing structures, is required to have only low flammability plants as identified by the Boulder Approved Tree and Plant List. In larger projects, existing noncompliant vegetation may require trimming per Section 10-8.5 to reduce wildfire risk. Existing junipers will also require removal in new development projects. Fences and walls New fences and walls within 8 feet of any building or structure are required to be constructed of noncombustible materials per Section 503.2.1

Section 10-8.5; 603.2.5, Fuels planted within defensible space

Section 10-8.5; 508, Fencing

Summary of Wildland Code Requirements (this summary is not exhaustive, but includes a summary of key elements found in and around site landscaping)

Specific Wildland Code Section 503.2.1, Noncombustible material

Decks, unenclosed accessory buildings New decks or unenclosed accessory buildings are required to be constructed of ignition-resistant building materials etc.

Section 10-8.5; 503.2.4.4, Appendages and projections

Section 8. Water Conservation and Efficiency Standards (A) Landscaping shall be designed to conserve water through application of all waterwise landscaping principles. Water wise landscaping principles do not include artificial turf or plants, mulched or gravel beds, or areas without landscape plant material, bare ground, weed-covered or infested surfaces, paving of areas not required for pedestrian access, plazas, or parking lots, or any landscaping that does not comply with the standards of this section. (B) Water wise landscaping principles include: 1) Plants from the same water use zone shall be grouped together on the same irrigation hydrozones and by sun exposure, soil type, and other climate considerations; 2) The use of high-irrigation turf and plantings shall be limited to high-use areas with high visibility or functional needs; 3) Very low and low water use zone plants and turf grass shall be used to the extent practicable; 4) Soils shall be protected from compaction or improved to allow water absorption and proper drainage.

8.1 Water Use Rules (A) To ensure the responsible and efficient use of water, the following rules in Section 8.1 shall apply to all uses of city water for the watering of landscaping.

(B) In addition to the requirements in the Boulder Revised Code and other applicable city requirements regarding the use of city water, it shall be unlawful for any person to cause or allow the application of city water for the watering of any landscaping between the hours of 10 a.m. and 6 p.m., from May 1 through September 30, with the following exceptions: 1) Watering through low-volume, drip, or sub-surface irrigation systems; 2) Properties greater than five acres in size with pressure issues in the sprinkler system on such property, where such pressure issues have been demonstrated to the city’s satisfaction; 3) Watering of new plant material for thirty (30) days following initial installation; 4) Hand watering of trees, shrubs, or plants with a hose that includes a shut-off nozzle; 5) Watering of areas for urban agriculture and food production; 6) Watering of functional turf on sports fields; and 7) Operating and attending to an irrigation system as needed for installation, repair, or reasonable maintenance.

Section 9. Irrigation Standards (A) Irrigation: The following standards shall apply to irrigation systems for required landscaped areas: 1) All landscaped areas, including, but not limited to, trees in tree pits, raised planters, planting in the public right-of-way, and all landscaping required in this chapter, shall be irrigated with a permanent, automatic irrigation system designed to provide efficient irrigation coverage with minimal overspray onto non-landscaped areas. 2) The city manager may approve the use of temporary irrigation systems for a maximum of three years, if all plant material is from very low or low water use plant categories. 3) Low-volume, drip, or subsurface irrigation systems shall be used in the following conditions: a. In landscaped areas where any one dimension is less than six feet in width and surrounded by impervious surfaces; b. In all non-turf grass areas. 4) Trees shall be zoned separately from understory plantings or grass when located in a low or very low water hydrozone. 5) A soil moisture sensing device or other irrigation management system shall be required for irrigation systems in turf areas.

6) The landscape plan shall indicate the nature, location, and specifications of the irrigation system which shall be used. Separate irrigation circuits should be specified for different zones on the landscape plan. The landscape plan shall have sufficient detail to show that adequate irrigation will be provided to all required landscape areas and plant materials. 7) The irrigation system shall be designed to correlate to the organization of plants into hydrozones with similar watering requirements. 8) Irrigation systems shall be designed to maximize efficient water use and minimize the waste of water.

Section 10. Landscaping Maintenance Standards (A) The property owner shall keep all landscaping in a well-maintained and healthy growing condition. This applies to new development, redevelopment and existing landscape on a regular basis. This includes: 1) Mowing, irrigating, and weeding 2) Removing trash and weeds, dead plants 3) Replacing dead plants included in Landscaping Plan 4) Replenishing materials like mulch 5) Repairing structural features (B) Owner is responsible for the maintenance, repair, and replacement of all required landscaping, screening, and curbing as depicted on any city approved landscape plan. (C) Noxious weeds shall be removed in accordance with Section 6-2-3. Growth or Accumulation of Weeds Prohibited, B.R.C. 1981. (D) Use of pesticides (e.g., all herbicides, insecticides, rodenticides, etc.) shall be consistent with Chapter 10, “Pesticide Use,” B.R.C. 1981 of Title 6, Health, Safety, and Sanitation.