A.
Scope. This Article contains the performance standards and regulations pertaining to the landscape elements of residential, commercial, and industrial properties; requirements for the provision of trees along public rights-of-way; maintenance requirements for trees and other landscape components adjacent to public rights-of-way; and administration and enforcement of these regulations.
B.
Purpose. The purpose of this Division is to establish minimum standards for the provision, installation, maintenance, and removal of landscape plantings in order to achieve a healthy, visually pleasing, and safe community by the following means:
1.
Preservation Of Vegetation. Preserve existing natural vegetation and the incorporation of native plants, plant communities, and ecosystems into landscape design, where possible.
2.
Aesthetics. Improve the appearance of all areas through the incorporation of open space into development in ways that harmonize and enhance the natural and built environment.
3.
Land Values. Maintain and increase the value of land by requiring landscape improvements to be incorporated into development, thus becoming by itself a valuable capital asset.
4.
Human Values. Provide direct and important physical and psychological benefits to human beings through the use of landscape materials to reduce noise and glare, to provide visual diversity and seasonal interest, and visually soften the harsher aspects of urban development.
5.
Improved Design. Promote innovative and cost-conscious approaches to the design, installation, and maintenance of landscaping, encouraging water and energy conservation.
C.
Applicability. Except where specifically exempt in this Article, requirements stated herein are applicable to properties proposed for subdivision into four (4) or more lots, properties applying for a planned development district properties applying for major site plan review, any proposed landscaping change in excess of 20% of the landscaped area of a site; maintenance and/or replacement of existing required trees and landscaping; and to the installation, maintenance, and/or replacement of trees in public rights-of-way or private streets within all zoning districts.
[Ord. No. 5361, 5-23-2023]
D.
Conflicts. If the provisions of this Article conflict with other sections of this Article or other ordinances or regulations, the more stringent limitation or requirement shall govern or prevail to the extent of the conflict.
E. BIORETENTION/RAIN GARDEN BUFFER, LANDSCAPE CALIPER CANOPY TREE CRITICAL ROOT ZONE (CRZ) CULTIVAR DIAMETER DRIPLINE GROUND COVER HEDGE INVASIVE SPECIES IRRIGATION SYSTEM MONOCULTURE MULCH NATIVE PLANT SPECIES SHRUB SPECIES STREET TREE TOPPING TREE LAWN TREE PROTECTION ZONE UNDERSTORY PLANTS UNDERSTORY TREE VARIETY
Definitions.
A landscaped area that lies below the level of its surroundings, designed to absorb and filter rainwater that runs off a surface using plant material, soils, and microbes.
A continuous area of land set aside along the perimeter of a lot in which plant materials may be used to provide a transition between, and to reduce the environmental, aesthetic, and other impacts of one (1) type of land use upon another.
The thickness (diameter) of a tree trunk, when measured six (6) inches above the ground for trees less than four (4) feet and twelve (12) inches above the ground for trees greater than four (4) feet.
A self-supporting woody plant of a species normally growing in the St. Louis metropolitan area to a mature height of not less than twenty (20) feet and a mature spread of not less than fifteen (15) feet. Refer to landscape points chart provided herein for description of medium and large canopy tree sizes and characteristics.
The area of tree roots within the crown dripline. This zone is generally defined as the area underneath a tree's canopy, extending from the tree's trunk to a point no less than the furthest crown dripline.
An assemblage of cultivated plants which is clearly distinguished by any characteristics (morphological, physiological, cytological, or chemical) and which, when reproduced (sexually or asexually), retains its distinguishing characteristics.
The diameter of the trunk of a tree, in inches of diameter, measured at breast height four and one half (4.5) feet above the original soil or natural grade. If a tree forks or separates into two (2) or more trunks below four and one half (4.5) feet, then the trunk is measured at its narrowest point below the fork. Also known as "diameter at breast height (DBH)."
A vertical line extending from the outermost branch tips of a tree to the finished grade below.
Plants, other than turf grass, normally reaching an average maximum height of not more than twenty-four (24) inches at maturity.
A landscape barrier consisting of a continuous, dense planting of woody vegetation which may be either composed of trees or shrubs.
A plant species included on the Missouri Department of Conservation's list of invasive species and identified as invasive by the Missouri Invasive Task Force (MoIP) Invasive Plant Assessment.
A permanent, automatic artificial watering system installed below grade designed to transport and distribute controlled amounts of water to plants.
The cultivation of a dominant single species of planting in an area.
Non-living organic or rock materials customarily used in landscaping designed to retain moisture, stabilize soil temperatures, control weed growth, and retard erosion.
Plant species as identified by Grow Native as a Missouri native plant.
A self-supporting woody perennial plant of low to medium height characterized by multiple stems and branches continuous from the base, usually not more than ten (10) feet in height at its maturity.
A unit or group of similar individual plants within a greater genus sharing the same traits. For example, Q.alba, White Oak.
A tree located within or directly adjacent to public right-of-way for the purpose of calming traffic, absorbing stormwater, and pollutants, mitigating heat island effect, providing shade, and adding aesthetic value.
The severe cutting back of limbs to stubs larger than three (3) inches in diameter with the tree's crown to such degree to distort the normal canopy shape, thus disfiguring the tree.
Planting area located within the right-of-way between the edge of road pavement and sidewalks typically planted with turf lawn.
The zone around a tree that will be maintained at the original grade and original conditions over the course of the development. This zone is determined by the critical root zone (CRZ) location.
Assemblages of natural low-level woody, herbaceous, and ground cover species which exist in the area below the canopy of the trees.
Any self-supporting woody plant which normally attains an overall height of no more than thirty (30) feet at maturity, usually with one (1) main stem or trunk and many branches. It may appear to have several stems or trunks in several species.
A term used in the botanical sense to constitute a group or class of plants subordinate to a species (e.g., subspecies). See definition for cultivar, sometime used interchangeably with cultivar.
F.
Plan Submission Requirements for Landscape.
1.
Landscape plans approved by the Director of Public Works shall be required on all new construction, demolition, excavation, and site redevelopment requiring permits from the Director of Public Works.
2.
Landscape plans are not required for single-family construction activities unless a Tree Preservation Plan as outlined in Section 26-21.5, Tree Preservation and Replacement Standards is required.
3.
Landscape plans submitted to the City for review shall have a scale of 1" = 50' or larger, be on standard size drawing sheets no larger than 36" x 48", and contain the following information:
a.
Drawing with graphic scale and drawing orientation (north arrow).
b.
Property lines, easements, rights-of-way (including dimensions).
c.
Zoning of site and adjoining properties.
d.
Existing and proposed contours at five (5) feet intervals or less.
e.
Location and dimensions of existing and proposed buildings, parking/vehicular use areas, paved surfaces, walls, fences, exterior light fixtures, including poles and wall packs, and other site features.
f.
Size and location of existing and proposed public and private utilities.
g.
Location and sizes of proposed trees and landscaping [proposed plant material should provide detailed information for species, cultivars (if applicable), size, and mature size].
h.
Location, size, and species of existing trees to remain on site.
i.
Construction details, including, but not limited to, planting details, fence details, location of irrigation systems (if applicable), trash, lighting, and recycling dumpster location, etc.
j.
Estimated time schedule for planting installation.
k.
A tabulation clearly displaying the relevant statistical information necessary to evaluate compliance with the provisions of this Article. This includes gross acreage, area of preservation areas, area of open space, number of trees to be planted and/or preserved, square footage of paved areas, required and provided parking spaces if applicable, and such other information as required.
l.
An irrigation plan indicating the location of automatic irrigation system layout, point of connections, utility connections and meters, backflow prevention, drip/spray/rotor irrigation components, sleeving, sensors, and piping.
m.
Name, address, and phone number of the property owner.
n.
Name, address, and phone number of the person and/or firm responsible for the production of drawings.
[1]
Editor's Note: Ord. No. 5174 also changed the title of this Section from "Scope; purpose; applicability; conflicts; definitions" to "Landscape scope, purpose, applicability, conflicts, and definitions."









