12-329300 - PLANTS SPEC.pdf

PLANTS

City of St. George | Downtown Cemetery Columbarium Plaza

329300 - 1 October 2026

SECTION 329300 – PLANTS

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. City of St. George Standard Specifications for Design and Construction, latest edition.

B. City of St. George Landscape Ordinance, Title 10, Chapter 23.

1.2 SUMMARY

A. The work covered by this section consists of furnishing all labor, materials, equipment and supplies in performing all operations in connection with landscape work in strict accordance with this section and applicable drawings. Work includes placement of planting backfill soil, amendments, mulches, pesticides, trees, shrubs, etc.

B. Any minor items of labor or materials not specifically noted on the drawings or specifications, but necessary for the proper completion of the work, shall be considered incidental to and are to be included in the work.

C. Work under this section shall include coordination of all work with all other sections of these specifications.

D. NO PLANTING SHALL OCCUR until the Irrigation system can function adequately within 24 hours of initial plant installation. Contractor shall be responsible for immediate replacement of any plants, seeds, or turf that perishes due to lack in insufficient watering by an inadequately functioning / installed irrigation system at no additional cost to the owner.

E. Section Includes:

1. Plants.

2. Planting soils.

3. Tree stabilization.

4. Landscape edgings.

F. Related Sections:

1. Division 32 Section 329200 "Turfgrass" for turf (lawn)

2. Division 33 Section 334800 "Subdrainage" for below-grade drainage of landscaped areas, paved areas, and wall perimeters.

1.3 DEFINITIONS

A. Backfill: The earth used to replace or the act of replacing earth in an excavation.

B. Bare-Root Stock: Plants with a well-branched, fibrous-root system developed by transplanting or root pruning, with soil or growing medium removed, and with not less than minimum root spread according to ANSI Z60.1 for type and size of plant required.

329300 - 2 October 2026

C. Container-Grown Stock: Healthy, vigorous, well-rooted plants grown in a container, with a well-established root system reaching sides of container and maintaining a firm ball when removed from container. Container shall be rigid enough to hold ball shape and protect root mass during shipping and be sized according to ANSI Z60.1 for type and size of plant required.

D. Final Acceptance: When the City of St. George accepts the project as fully complete and takes ownership.

E. Finish Grade: Elevation of finished surface of planting soil.

F. Manufactured Topsoil: Soil produced off-site by homogeneously blending mineral soils or sand with stabilized organic soil amendments to produce topsoil or planting soil.

G. Park Strip: Planting area between back of curb and concrete walk.

H. Pesticide: A substance or mixture intended for preventing, destroying, repelling, or mitigating a pest. This includes insecticides, miticides, herbicides, fungicides, rodenticides, and molluscicides. It also includes substances or mixtures intended for use as a plant regulator, defoliant, or desiccant.

I. Park Strip: Planting area between the back of curb, concrete walk, asphalt trail, or property line.

J. Pests: Living organisms that occur where they are not desired, or that cause damage to plants, animals, or people. These include insects, mites, grubs, mollusks (snails and slugs), rodents (gophers, moles, and mice), unwanted plants (weeds), fungi, bacteria, and viruses.

K. Planting Area: Areas to be planted.

L. Planting Soil: Standardized topsoil; existing, native surface topsoil; existing, in-place surface soil; imported topsoil; or manufactured topsoil that is modified with soil amendments and perhaps fertilizers to produce a soil mixture best for plant growth.

M. Plant; Plants; Plant Material: These terms refer to vegetation in general, including trees, shrubs, vines, ground covers, ornamental grasses, bulbs, corms, tubers, or herbaceous vegetation.

N. Root Flare: Also called "trunk flare." The area at the base of the plant's stem or trunk where the stem or trunk broadens to form roots; the area of transition between the root system and the stem or trunk.

O. Stem Girdling Roots: Roots that encircle the stems (trunks) of trees below the soil surface.

P. Sub-grade: Surface or elevation of subsoil remaining after excavation is complete, or the top surface of a fill or backfill before planting soil is placed.

Q. Sub-soil: All soil beneath the topsoil layer of the soil profile and typified by the lack of organic matter and soil organisms.

R. Surface Soil: Soil that is present at the top layer of the existing soil profile at the Project site. In undisturbed areas, the surface soil is typically topsoil; but in disturbed areas such as urban environments, the surface soil can be subsoil.

329300 - 3 October 2026

S. Topsoil: The soil ordinarily moved in tillage or its equivalent in uncultivated soil. The “A” horizon which is the mineral horizon at the surface. This horizon is the one in which living organisms are most active and therefore is marked by the accumulation of humus.

T. Weed: Any plant other than that specified for the project in the area where a specific plant is designated.

1.4 SUBMITTALS

A. Product Data: Submit to City’s Park Planning Project Manager for approval for each type of product indicated.

1. A copy of the plant purchase order indicating plant names, sizes, quantities, and unit prices.

Submit within 90 calendar days from the Notice to Proceed.

2. Plant Substitutions:

a. Obtain a signed statement from three wholesale nurseries, noted for stocking the specified plants, indicating that the plants are unavailable.

b. Submit to the City Park Planning Project Manager the signed statements and a written request indicating the size and species of the unavailable plants and their suggested replacements.

c. Substitutions will not be approved after 120 calendar days from the Notice to Proceed.

3. Pesticides and Herbicides: Include product label and manufacturer's application instructions specific to the Project.

B. Samples for Verification: For each of the following:

1. Organic Mulch: 1-quart volume of each organic mulch required; in sealed plastic bags labeled with composition of materials by percentage of weight and source of mulch. Each Sample shall be typical of the lot of material to be furnished; provide an accurate representation of color, texture, and organic makeup.

2. Mineral Mulch: 1 lb. of each mineral mulch required, in sealed plastic bags labeled with source of mulch. Sample shall be typical of the lot of material to be delivered and installed on the site; provide an accurate indication of color, texture, and makeup of the material.

3. Tree Grates and Accessories: Manufacturer's cut sheets listing standard size, to verify design, material and color selected.

4. Tree Stakes and Ties: Manufacturer’s cut sheets listing size, model number, and material.

C. Maintenance Instructions: Recommended procedures to be established by Owner for maintenance of plants during a calendar year. Submit before start of maintenance by owner.

1.5 QUALITY ASSURANCE

A. Installer Qualifications: The Landscape Contractor shall meet state and local license, insurance and bonding requirements per section 10-23-1(B)(1) of the City of St. George Landscape Ordinance and is able to show proof of such upon demand.

1. Installer's Field Supervision: Require Installer to maintain an experienced full-time supervisor fluent in English on Project site when work is in progress.

2. Pesticide Applicator: State licensed, commercial.

3. Tree Pruner Qualifications: Tree Pruners shall meet the requirements per section 7-4-4 of the City of St. George Tree Pruner’s License Ordinance.

329300 - 4 October 2026

B. Provide quality, size, genus, species, and variety of plants indicated, complying with applicable requirements in ANSI Z60.1. In addition to ANSI Z60.1 shape and form of trees shall not have any of the following characteristics co-dominant stems, have the central leader cut, decurrent growth habit, or bark inclusion. Trees shall have good branch attachment and be structurally sound.

C. Measurements: Measure according to ANSI Z60.1. Do not prune to obtain required sizes.

1. Trees and Shrubs: Measure with branches and trunks or canes in their normal position.

Take height measurements from or near the top of the root flare for field-grown stock and container grown stock. Measure main body of tree or shrub for height and spread; do not measure branches or roots tip to tip. Take caliper measurements 12 inches above the root flare.

2. Other Plants: Measure with stems, petioles, and foliage in their normal position.

D. Plant Material Observation: Park Planning Project Manager and/or Park Planning Inspector shall observe plant material either at place of growth or at site before planting for compliance with requirements for genus, species, variety, cultivar, size, and quality. Park Planning Project Manager and/or Park Planning Inspector retains right to observe trees and shrubs further for size and condition of balls and root systems, pests, disease symptoms, injuries, and latent defects and to reject unsatisfactory or defective material at any time during progress of work. Remove rejected trees or shrubs immediately from Project site.

1. Notify Project Manager/Landscape Architect and/or Park Planning Inspector of sources of planting materials five to seven days in advance of delivery to site.

E. Preinstallation Conference: Conduct conference at Project Site.

1.6 DELIVERY, STORAGE, AND HANDLING

A. Packaged Materials: Deliver packaged materials in original, unopened containers showing weight, certified analysis, name and address of manufacturer, and indication of conformance with state and federal laws if applicable.

B. Bulk Materials:

1. Do not dump or store bulk materials near structures, utilities, walkways and pavements, or on existing turf areas or plants.

2. Provide erosion-control measures to prevent erosion or displacement of bulk materials, discharge of soil-bearing water runoff, and airborne dust reaching adjacent properties, water conveyance systems, or walkways.

3. Accompany each delivery of bulk fertilizers and soil amendments with appropriate certificates.

C. Deliver bare-root stock plants freshly dug. Immediately after digging up bare-root stock, pack root system in wet straw, hay, or other suitable material to keep root system moist until planting.

D. Do not prune trees and shrubs before delivery. Protect bark, branches, and root systems from sun scald, drying, wind burn, sweating, whipping, and other handling and tying damage. Do not bend or bind-tie trees or shrubs in such a manner as to destroy their natural shape. Provide protective covering of plants during shipping and delivery. Do not drop plants during delivery and handling.

329300 - 5 October 2026

E. Handle planting stock by root ball.

F. Store bulbs, corms, and tubers in a dry place at 45° to 80° deg F until planting.

G. Deliver plants after preparations for planting have been completed and install immediately. If planting is delayed more than six hours after delivery, set plants and trees in their appropriate aspect (sun, filtered sun, or shade), protect from weather and mechanical damage, and keep roots moist.

1. Heel-in bare-root stock. Soak roots that are in dry condition in water for two hours. Reject dried-out plants.

2. Set balled stock on ground and cover ball with soil, peat moss, sawdust, or other acceptable material.

3. Do not remove container-grown stock from containers before time of planting.

4. Water root systems of plants stored on-site deeply and thoroughly with a fine-mist spray.

Water daily to maintain root systems in a moist, but not an overly wet condition. Container plants 5 Gallon or smaller shall be watered NO LESS THAN TWICE DAILY when the air temperature rises above 65° F.

H. Plants moved from the storage area to their respective planting area SHALL be planted in-ground the same day.

1.7 PROJECT CONDITIONS

A. Field Measurements: Verify actual grade elevations, service and utility locations, irrigation system components, and dimensions of plantings and construction contiguous with new plantings by field measurements before proceeding with planting work.

B. Interruption of Existing Services or Utilities: Do not interrupt services or utilities to facilities occupied by Owner or others unless permitted under the following conditions and then only after arranging to provide temporary services or utilities according to requirements indicated:

1. Notify Landscape Architect/Project Manager no fewer than five days in advance of proposed interruption of each service or utility.

2. Do not proceed with interruption of services or utilities without Landscape Architect’s/Project Manager’s written permission.

C. Planting Restrictions: Plant during one of the following periods. Coordinate planting periods with maintenance periods to provide required maintenance from date of Substantial Completion.

1. Tree Planting: September 1st to May 31st.

2. Shrubs Planting:

a. Spring Planting: March 15th to June 15th

b. Fall Planting: August 15th to November 15th

D. Weather Limitations: Proceed with planting only when existing and forecasted weather conditions permit planting to be performed when beneficial and optimum results may be obtained.

Apply products during favorable weather conditions according to manufacturer's written instructions and warranty requirements.

E. Coordination with Turf Areas (Lawns): Plant trees, shrubs, and other plants after finish grades are established and before planting turf areas unless otherwise indicated.

329300 - 6 October 2026

1. When planting trees, shrubs, and other plants after planting turf areas, protect turf areas, and promptly repair damage caused by planting operations.

1.8 WARRANTY

A. Warranty General: Installer agrees to repair or replace plantings and accessories that fail in materials, workmanship, or growth within specified warranty period.

1. Failures include, but are not limited to, the following:

a. Death and unsatisfactory growth due to: (the following conditions may result in immediate replacement at the owner’s request prior to Final Acceptance)

1) Neglect.

2) Lack of adequate maintenance.

3) Inadequate, faulty, or delayed installation of the irrigation system in planting areas.

4) Inadequate watering or neglect of plant material in storage awaiting planting.

5) Trampling by onsite construction vehicles, workmen, or sub-contractors.

6) Spillage or intentional wash out of materials such as paint, petrochemicals, concrete or cement, and pesticides or herbicides on or near plants in planting areas.

7) Weather and winter temperatures are NOT considered “incidents beyond the contractor’s control” and plants must be replaced under this warranty section.

b. Structural failures including plants falling or blowing over.

c. Faulty performance of tree stabilization (staking or guying).

d. Exceptions for damage resulting from vandalism or incidents beyond the

Contractor’s control.

B. Warranty Periods from Date of Substantial Completion:

1. Large Project – defined as greater than 1 acre or $100,000 contract amount.

a. Shrubs, Perennials, Vines, Ornamental Grasses, Ground Covers, Biennials, Herbaceous Annuals: 90 days

b. Trees:

1) Spring Planting through Summer until deciduous trees drop their leaves.

2) Fall Planting through dormancy until trees leaf out in Spring.

2. Include the following remedial actions as a minimum:

a. Immediately remove dead plants and replace unless required to plant in the succeeding planting season.

b. Replace plants that are more than 25 percent dead or in an unhealthy condition at end of warranty period.

c. A limit of one replacement of each plant will be required except for losses or replacements due to failure to comply with requirements.

d. Provide additional warranty for period equal to original warranty period, for replaced plant material.

1.9 INSPECTIONS

A. The City of St. George Park Planning Division will make landscape inspections listed below.

Contractor must obtain approval from Park Planning Inspector and/or Project Manager before proceeding with the next item or risk removal and replacement of work installed without additional compensation.

329300 - 7 October 2026

1. Pre-construction meeting

2. Approve topsoil and agronomics soil test and recommendations

3. Verify soil preparation/amendments

4. Verify plant species, size, quality, quantities and location.

5. Planting depth, staking

6. Finish grade and mulch depth

7. Substantial completion inspection

8. Identify dead and/or unsatisfactory plants for immediate replacement according to the conditions outlined in specification section 1.8.A.1.a prior to Final Acceptance

9. Review of punch list items

10. Final Acceptance

1.10 MAINTENANCE SERVICE

A. Initial Maintenance Service for Trees and Shrubs, Ground Cover and Other Plants: Provide maintenance by skilled employees of landscape installer. Maintain as required in Part 3. Begin maintenance immediately after plants are installed and continue until Final Acceptance of the project by the City.

1. Contractor to schedule a Plant Maintenance site observation visit with the City Park Planning Project Manager to begin the Plant Maintenance Period and Complete Final Acceptance of the project.

2. Contractor to schedule a final Acceptance verification site visit to end Contractor’s required maintenance and complete Final Acceptance of project by the City.

PART 2 - PRODUCTS

2.1 PLANT MATERIAL

A. General: Furnish nursery-grown plants true to genus, species, variety, cultivar, stem form, shearing, and other features indicated in Plant Schedule or Plant Legend shown on Drawings and complying with ANSI Z60.1; and with healthy root systems developed by transplanting or root pruning. Provide well-shaped, fully branched, healthy, vigorous stock, densely foliated when in leaf and free of disease, pests, eggs, larvae, and defects such as knots, sun scald, injuries, abrasions, and disfigurement.

1. Trees with clipped, damaged, crooked, or multiple leaders; tight vertical branches where bark is squeezed between two branches or between branch and trunk ("included bark");

crossing trunks; cut-off limbs more than 3/4 inch in diameter; or with stem girdling roots will be rejected.

2. Collected Stock: Do not use plants harvested from the wild, from native stands, from an established landscape planting, or not grown in a nursery unless otherwise indicated.

B. Provide plants of sizes, grades, and ball or container sizes complying with ANSI Z60.1 for types and form of plants required. Plants of a larger size may be used if acceptable to Architect, with a proportionate increase in size of roots or balls.

C. Root-Ball Depth: Furnish trees and shrubs with root balls measured from top of root ball, which shall begin at root flare according to ANSI Z60.1. Root flare shall be visible before planting.

329300 - 8 October 2026

D. Labeling: Label each plant of each variety, size, and caliper with a securely attached, waterproof tag bearing legible designation of common name and full scientific name, including genus and species. Include nomenclature for hybrid, variety, or cultivar, if applicable for the plant as shown on Drawings. Tags are to remain on the plant material until Final Acceptance and be removed immediately afterwards.

E. If formal arrangements or consecutive order of plants is shown on Drawings, select stock for uniform height and spread, and number the labels to assure symmetry in planting.

F. Shrubs: Provide healthy, disease-free plants of species and variety shown or listed, with well-established root systems reaching to sides of the container to maintain a firm ball, but not with excessive root growth encircling the container. Provide only plants that are acclimated to outdoor conditions before delivery.

2.2 MULCHES

A. Organic Mulch: Free from deleterious materials and suitable as a top dressing of trees and shrubs, consisting of one of the following:

1. Type: Shredded wood and bark chips.

a. Do not use within 10 feet of a minor arterial roadway (90-foot right-of-way) or greater.

b. Size Range: 3 inches maximum, 3/4-inch minimum (80 percent as 3-inch material and 20 percent as 3/4-inch material).

c. Color: Natural or as specified on plan.

B. Mineral Mulch: Hard, durable stone, washed, free of loam, sand, clay, and other foreign substances, of the following type, size range, and color:

1. Type: Angular crushed stone or decomposed granite

a. Size Range: 1/4 inch minus (chat)

b. Color: Uniform color range acceptable to City’s Project Manager or authorized representative.

2. Type: Angular crushed stone or smooth faced stone

a. Size Range: 1/2 to 3/4 inches maximum.

b. Color: Uniform color range acceptable to City’s Project Manager or authorized representative.

3. Type: Angular crushed stone or smooth faced stone

a. Size Range: 2 inches maximum.

b. Color: Uniform color range acceptable to City’s Project Manager or authorized representative.

4. Type: Angular crushed stone or smooth faced stone.

a. Size Range: 4 inches to 8 inches maximum.

b. This size is only allowed in a maximum width of 8’ bands throughout landscaped area.

c. Color: Uniform color range acceptable to City’s Project Manager or authorized representative.

329300 - 9 October 2026

C. Boulders: Hard, durable stone, washed free of loam, sand, clay, and other foreign substances, of the following type, size range , and color:

1. Type: Per construction plans and details.

a. Size Range: 2 to 5 foot diameter with size no greater than 25% in plan specified diameter size unless otherwise approved by City’s Project Manager or authorized representative.

b. Color: Per construction plans.

2.3 PESTICIDES

A. General: Pesticide registered and approved by EPA, acceptable to authorities having jurisdiction, and of type recommended by manufacturer for each specific problem and as required for Project conditions and application. Do not use restricted pesticides unless authorized in writing by authorities having jurisdiction.

B. Pre-Emergent Herbicide (Selective and Non-Selective): Effective for controlling the germination or growth of weeds within planted areas at the soil level directly below the mulch layer.

C. Post-Emergent Herbicide (Selective and Non-Selective): Effective for controlling weed growth that has already germinated.

2.4 TREE STABILIZATION MATERIALS

A. Stakes and Guys:

1. Upright and Guy Stakes: Rough-sawn, sound, new lodgepole pine, free of knots, holes, cross grain, and other defects, 2-by-2-inch nominal (38-by-38-mm actual) by length indicated, pointed at one end.

2. Proprietary Staking-and-Guying Devices: Proprietary stake and adjustable tie systems to secure each new planting by plant stem; sized as indicated and per manufacturer's written recommendations.

a. Products: Subject to compliance with requirements, provide the following:

1) Chain-Lock Tie – two per tree

2.5 LANDSCAPE EDGINGS

A. Concrete Curb: Between turf and planting beds AND between asphalt pavement and turf. Refer to construction plans and details.

1. Concrete curbing

a. 6” x 6” (unless otherwise specified) without rebar

1) Formed on-site

2) Machine extruded

3) Fiberglass reinforcement

PART 3 - EXECUTION

3.1 EXAMINATION

A. No planting operations shall commence until the irrigation system has been installed, inspected, trenches are backfilled and is acceptably operational, so that any/all plant material will be irrigated within 24 HOURS of in-ground plant installation.

329300 - 10 October 2026

B. Examine areas to receive plants for compliance with requirements and conditions affecting installation and performance.

1. Verify that no foreign or deleterious material or liquid has been deposited in the soil within the planting area. These materials or liquids shall be removed from the soils and planting areas prior to commencing ANY planting AT NO COST TO THE CITY. These include:

a. Paint and paint washout:

1) Soils shall be removed to a minimum depth of twelve (12”) inches below the depth of the paint and paint washout penetration into the soil and removed to a twelve (12”) inch radius beyond the outside edge of the paint or paint washout puddle. If oil or petrochemical based paint, see d.1 below for mitigation requirements.

b. Road bases or other compactable engineered soils and materials not suitable for planting.

c. Concrete slurry, concrete layers, concrete chunks, cements and/or plasters:

1) Soils shall be removed to a minimum depth of eighteen (18”) inches below the depth of the concrete slurry or plaster penetration into the soil and removed to an eighteen (18”) inch radius beyond the outside edge of the puddles.

d. Oils, gasoline, diesel fuel, grease, or other petrochemicals:

1) Soils shall be removed to a minimum depth of thirty-six (36”) inches below the depth of any petrochemical (Oil, Fuels, etc.) penetration into the soil and removed to a twenty-four (24”) radius beyond the outside edge of the petrochemical spillage puddle.

e. Paint thinner or turpentine; See d.1 above for mitigation requirements.

f. Tar or roofing compounds; See c.1 above for mitigation requirements.

g. Acids or other corrosive chemicals; See d.1 above for mitigation requirements.

2. Verify that there are no stones larger than 2 inches in any dimension, sticks, roots, and/or rubbish in the planting areas.

3. Do not mix or place soils and soil amendments in frozen, wet, or muddy conditions.

4. Suspend soil spreading, grading, and tilling operations during periods of excessive soil moisture until the moisture content reaches acceptable levels to attain the required results.

5. Uniformly moisten excessively dry soil that is not workable, and which is too dusty.

C. Proceed with installation only after unsatisfactory conditions have been corrected and verified by the City Park Planning Project Manager and/or Park Planning Inspector.

D. If contamination by foreign or deleterious material or liquid is present in soil within a planting area, remove/over excavate the soil and contamination as directed by City Park Planning Project Manager and replace with new planting soil.

3.2 PREPARATION

A. Protect structures, utilities, sidewalks, pavements, and other facilities and turf areas and existing plants from damage caused by planting operations.

B. Spray out all weeds with post-emergent herbicide and wait 7 days for kill prior to grubbing and removal.

C. Install erosion-control measures to prevent erosion or displacement of soils and discharge of soil-bearing water runoff or airborne dust to adjacent properties and walkways.

329300 - 11 October 2026

D. Lay out individual tree and shrub locations and areas for multiple plantings. Stake or flag locations, outline areas, adjust locations when requested, and obtain City Park Planning Project Manager’s acceptance of layout before excavating or planting. Make minor adjustments as required.

E. Wrap trees and shrubs with burlap fabric over trunks, branches, stems, twigs, and foliage to protect from wind and other damage during digging, handling, and transportation.

3.3 PLANTING AREA ESTABLISHMENT

A. Ensure planter sub-drainage is installed, inspected and approved.

B. Loosen subgrade of planting areas to a minimum depth of 6 inches. Remove stones larger than 2 inches in any dimension and sticks, roots, rubbish, and other extraneous matter and legally dispose of them off Owner's property.

C. Plow, scarify, bench, or break up sloped surfaces steeper than 1 vertical to 4 horizontal so fill material will bond with existing material.

D. Thoroughly blend planting soil on-site before spreading.

1. Delay mixing fertilizer with planting soil if planting will not proceed within a few days.

E. Spread amended planting soil to a depth specified on plans but not less than required to meet finish grades after natural settlement and mound 6 inches at the center of the planting area. Do not spread if planting soil or subgrade is frozen, muddy, or excessively wet.

F. Finish Grading: Grade planting areas to a smooth linear mound, uniform surface plane with loose, uniformly fine texture. Roll and rake, remove ridges, and fill depressions to meet finish grades.

Insure positive surface drainage.

G. Before planting, obtain City’s acceptance of finish grading; restore planting areas if eroded or otherwise disturbed after finish grading.

3.4 EXCAVATION FOR TREES AND SHRUBS

A. Tree Planting Pits: Excavate circular planting pits with sides sloping inward at a 45-degree angle.

Excavations with vertical sides are not acceptable. Trim perimeter of bottom leaving center area of bottom raised slightly to support root ball and assist in drainage away from center. Do not further disturb base. Ensure that tree root ball will sit on compacted base soil to prevent settling.

Scarify sides of planting pit smeared or smoothed during excavation.

1. Excavate two times as wide as root ball diameter for container-grown stock.

2. Do not excavate deeper than depth of the root ball, measured from the root flare to the bottom of the root ball.

3. If area under the plant was initially dug too deep, add soil to raise it to the correct level and thoroughly tamp the added soil to prevent settling.

4. Maintain required angles of repose of adjacent materials as shown on the Drawings. Do not excavate subgrades of adjacent paving, structures, hardscapes, or other new or existing improvements.

5. Maintain supervision of excavations during working hours.

6. Keep excavations covered or otherwise protected when unattended by Installer's personnel.

7. If drain tile is shown on Drawings or required under planting areas, excavate to drain to top of porous backfill over tile.

329300 - 12 October 2026

B. Subsoil removed from excavations may not be used as planting soil.

C. Obstructions: Notify City Park Planning Project Manager if unexpected rock or obstructions detrimental to trees or shrubs are encountered in excavations.

D. Drainage: Notify City Park Planning Project Manager if subsoil conditions evidence unexpected water seepage or retention in tree or shrub planting pits.

E. Fill excavations with water and allow to percolate away before positioning trees and shrubs.

3.5 TREE, SHRUB, VINE, AND OTHER PLANT MATERIAL PLANTING

A. Before planting, verify that root flare is visible at top of root ball according to ANSI Z60.1. If root flare is not visible, remove soil in a level manner from the root ball to where the top-most root emerges from the trunk. After soil removal to expose the root flare, verify that root ball still meets size requirements.

B. Remove stem girdling roots and kinked roots. Remove injured roots by cutting cleanly; do not break.

C. Set container-grown stock plumb and in center of planting pit or trench with tree root flares 2 inches above adjacent finish grades and shrub root flares 1” above finished grades.

1. Use planting soil for backfill.

2. Carefully remove root ball from container without damaging root ball or plant.

3. Backfill around root ball in layers, tamping to settle soil and eliminate voids and air pockets. When planting pit is approximately one-half filled, water thoroughly before placing remainder of backfill. Repeat watering until no more water is absorbed.

4. Continue backfilling process. Water again after placing and tamping final layer of soil.

D. When planting on slopes, set the plant so the root flare on the uphill side is flush with the surrounding soil on the slope; the edge of the root ball on the downhill side will be above the surrounding soil. Apply enough soil to cover the downhill side of the root ball.

E. All plants shall be irrigated within 24 HOURS of planting with the specified irrigation components as outlined in the project’s construction irrigation plan and documents. Hand watering of plants after planting shall only be permitted by written permission of the City’s Project Manager or authorized representative 72 HOURS PRIOR to any installation or planting.

3.6 TREE, SHRUB, AND VINE PRUNING

A. Tree pruner must meet required qualifications.

B. Remove only dead, dying, or broken branches. Do not prune for shape.

C. Prune, thin, and shape trees, shrubs, and vines as directed by Landscape Architect.

D. Prune, thin, and shape trees, shrubs, and vines according to standard professional horticultural and arboricultural practices. Unless otherwise indicated by Landscape Architect, do not cut tree leaders; remove only injured, dying, or dead branches from trees and shrubs; and prune to retain natural character.

E. Do not apply pruning paint to wounds.

329300 - 13 October 2026

3.7 TREE STABILIZATION

A. Install trunk stabilization as follows unless otherwise indicated:

1. Upright Staking and Tying: Stake all trees. Use a minimum of two stakes of length required to penetrate at least 24 inches below bottom of backfilled excavation and to extend to the dimension shown on Drawings above grade. Set vertical stakes and space to avoid penetrating root balls or root masses.

2. Support trees with bands of flexible ties at contact points with tree trunk. Allow enough slack to avoid rigid restraint of tree.

3. Proprietary Tying Device: Install tying system sized and positioned as recommended by manufacturer unless otherwise indicated and according to manufacturer's written instructions.

3.8 PLANTING IN PLANTERS

A. Comply with Section 334600 Subdrainage or as otherwise indicated per construction plans and details.

B. Fill planter with planting soil per construction plans and details. Place soil in lightly compacted layers to an elevation of 3 inches below top of planter edges, allowing natural settlement and application of mulch. Mound soil to middle of planter as shown in plan details.

3.9 PLANTING AREA MULCHING

A. Mulch backfilled surfaces of planting areas and other areas indicated.

1. Organic Mulch in Planting Areas: Apply organic mulch over entire surface of planting area per construction plans and details. Finish level with adjacent finish grades. Do not place mulch within 6 inches of tree trunks of shrub stems.

2. Mineral Mulch in Planting Areas: Apply of mineral mulch over entire surface of planting area per construction plans and details. Finish level with adjacent finish grades. Do not place mulch within 6 inches of tree trunks or shrub stems.

a. Any mineral mulch that covers plant cores, such as Agaves, Yuccas and other plants with rosette type growing habits, shall be cleared away or cleaned out immediately.

3.10 EDGING INSTALLATION

A. Concrete Edging: Install edging where indicated on plans and per construction details.

3.11 PLANT MAINTENANCE

A. Maintain plantings by pruning, cultivating, watering, weeding, fertilizing, mulching, restoring planting saucers, adjusting and repairing tree-stabilization devices, resetting to proper grades or vertical position, and performing other operations as required to establish healthy, viable plantings. Spray or treat as required to keep trees and shrubs free of insects and disease.

B. Fill in as necessary soil subsidence that may occur because of settling or other processes. Replace mulch materials damaged or lost in areas of subsidence.

329300 - 14 October 2026

C. Apply treatments as required to keep plant materials, planted areas, and soils free of pests and pathogens or disease. Use integrated pest management practices whenever possible to minimize the use of pesticides and reduce hazards. Treatments include physical controls such as hosing off foliage, mechanical controls such as traps, and biological control agents.

3.12 PESTICIDE APPLICATION

A. Apply pesticides and other chemical products and biological control agents in accordance with authorities having jurisdiction and manufacturer's written recommendations. Coordinate applications with Owner's operations and others in proximity to the Work. Notify Owner before each application is performed.

B. Pre-Emergent Herbicides (Selective and Non-Selective): Apply to tree, shrub, and ground-cover areas in accordance with manufacturer's written recommendations. Do not apply to seeded areas.

C. Post-Emergent Herbicides (Selective and Non-Selective): Apply only as necessary to treat already-germinated weeds and in accordance with manufacturer's written recommendations.

3.13 CLEANUP AND PROTECTION

A. During planting, keep adjacent paving and construction clean and work area in an orderly condition. All trash such plant containers and boxes shall be disposed of daily.

B. Protect plants from damage due to landscape operations and operations of other contractors and trades. Maintain protection during installation and maintenance periods. Treat, repair, or replace damaged plantings.

C. After installation and immediately after Final Acceptance, remove nursery tags, nursery stakes, tie tape, labels, wire, burlap, and other debris from plant material, planting areas, and Project site.

3.14 DISPOSAL

A. Remove surplus soil and waste material including excess subsoil, unsuitable soil, trash, and debris and legally dispose of them off Owner's property.

3.15 INSPECTION AND ACCEPTANCE

A. When the landscape work is completed, the City of St. George Park Planning Project Manager will, upon request, make an inspection to determine Substantial Completion.

B. The warrantee begins from the date of Final Acceptance.

C. Where inspected landscape work does not comply with the requirement, replace rejected work and continue specified maintenance until re-inspected by the City of St. George Park Planning Inspector and/or Project Manager and found to be acceptable. Remove rejected plants and materials promptly from the project site.

D. As-built Drawings and Compliance Letter: Landscape Contractor is to furnish to the Owner’s Authorized Representative at the time of Substantial Completion the As-Built Drawings and a letter certifying that all improvements have been installed in accordance with the approved plans and specifications.

329300 - 15 October 2026

END OF SECTION 329300