HomeMy WebLinkAboutFile Documents.427 Rio Grande Pl.0016.2019 (17).ACBKAspen City Offices City Comments
Aspen, CO May 13, 2019
PLANTS 329300 - 1
SECTION 329300 - PLANTS
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
1.2 SUMMARY
A. Section Includes:
1. Plants.
2. Tree stabilization.
3. Tree-watering devices.
4. Landscape edgings.
B. Related Requirements:
1. Section 015639 "Temporary Tree and Plant Protection" for protecting, trimming,
pruning, repairing, and replacing existing trees to remain that interfere with, or are
affected by, execution of the Work.
2. Section 129200 "Interior Planters and Artificial Plants" for planters for live and artificial
interior plants.
3. Section 329200 "Turf and Grasses" for turf (lawn) and meadow planting, hydroseeding,
and erosion-control materials.
4. Section 329600 "Transplanting" for transplanting non-nursery-grown trees.
1.3 ALLOWANCES
A. Allowances for plants are specified in Section 012100 "Allowances."
1. Perform planting work under quantity allowances and only as authorized. Authorized
work includes [work required by Drawings and the Specifications and] [only] work
authorized in writing by Architect.
2. Notify Architect [weekly] <Insert time interval> of extent of work performed that is
attributable to quantity allowances.
3. Perform work that exceeds quantity allowances only as authorized by Change Orders.
B. Furnish trees as part of tree allowance.
C. Furnish <Insert plant variety> as part of <Insert name of allowance>.
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While this draft specification document
may be thorough, it has little relevance
to the WELS review. The provisions set
forth in WELS Sections 4.3.2- Plant
Material are the Standards by which the
project must abide. This document will
not be considered as part of the WELS
approval
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PLANTS 329300 - 2
1.4 UNIT PRICES
A. Work of this Section is affected by unit prices specified in Section 012200 "Unit Prices."
B. Unit prices apply to authorized work covered by quantity allowances.
C. Unit prices apply to additions to and deletions from the Work as authorized by Change Orders.
1.5 DEFINITIONS
A. Backfill: The earth used to replace or the act of replacing earth in an excavation.
B. Balled and Burlapped Stock: Plants dug with firm, natural balls of earth in which they were
grown, with a ball size not less than [sizes indicated] [diameter and depth recommended by
ANSI Z60.1 for type and size of plant required]; wrapped with burlap, tied, rigidly supported,
and drum laced with twine with the root flare visible at the surface of the ball as recommended
by ANSI Z60.1.
C. Balled and Potted Stock: Plants dug with firm, natural balls of earth in which they are grown
and placed, unbroken, in a container. Ball size is not less than [sizes indicated] [diameter and
depth recommended by ANSI Z60.1 for type and size of plant required].
D. 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 the minimum
root spread according to ANSI Z60.1 for type and size of plant required.
E. 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.
F. Fabric Bag-Grown Stock: Healthy, vigorous, well-rooted plants established and grown in-
ground in a porous fabric bag with well-established root system reaching sides of fabric bag.
Fabric bag size is not less than diameter, depth, and volume required by ANSI Z60.1 for type
and size of plant.
G. Finish Grade: Elevation of finished surface of planting soil.
H. Pesticide: A substance or mixture intended for preventing, destroying, repelling, or mitigating a
pest. Pesticides include insecticides, miticides, herbicides, fungicides, rodenticides, and
molluscicides. They also include substances or mixtures intended for use as a plant regulator,
defoliant, or desiccant. Some sources classify herbicides separately from pesticides.
I. Pests: Living organisms that occur where they are not desired or that cause damage to plants,
animals, or people. Pests include insects, mites, grubs, mollusks (snails and slugs), rodents
(gophers, moles, and mice), unwanted plants (weeds), fungi, bacteria, and viruses.
J. Planting Area: Areas to be planted.
K. Planting Soil: Existing, on-site soil; imported soil; or manufactured soil that has been modified
with soil amendments and perhaps fertilizers to produce a soil mixture best for plant growth.
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See [Section 329113 "Soil Preparation"] [Section 329115 "Soil Preparation (Performance
Specification)"] for drawing designations for planting soils.
L. 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.
M. 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.
N. Stem Girdling Roots: Roots that encircle the stems (trunks) of trees below the soil surface.
O. Subgrade: The surface or elevation of subsoil remaining after excavation is complete, or the top
surface of a fill or backfill before planting soil is placed.
1.6 COORDINATION
A. Coordination with Turf Areas (Lawns): Plant trees, shrubs, and other plants after finish grades
are established and before planting turf areas unless otherwise indicated.
1. When planting trees, shrubs, and other plants after planting turf areas, protect turf areas,
and promptly repair damage caused by planting operations.
1.7 PREINSTALLATION MEETINGS
A. Preinstallation Conference: Conduct conference at [Project site] <Insert location>.
1.8 ACTION SUBMITTALS
A. Product Data: For each type of product.
1. Plant Materials: Include quantities, sizes, quality, and sources for plant materials.
2. Plant Photographs: Include color photographs in [digital] [3- by 5-inch print] format of
each required species and size of plant material as it will be furnished to Project. Take
photographs from an angle depicting true size and condition of the typical plant to be
furnished. Include a scale rod or other measuring device in each photograph. For species
where more than [20] <Insert number> plants are required, include a minimum of
[three] <Insert number> photographs showing the average plant, the best quality plant,
and the worst quality plant to be furnished. Identify each photograph with the full
scientific name of the plant, plant size, and name of the growing nursery.
B. Samples for Verification: For each of the following:
1. Trees and Shrubs: [Three] <Insert number> Samples of each variety and
size[ delivered to site for review]. Maintain approved Samples on-site as a standard for
comparison.
2. Organic Mulch: [1-pint] [1-quart] <Insert value> volume of each organic mulch
required; in sealed plastic bags labeled with composition of materials by percentage of
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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.
3. Mineral Mulch: [2 lb] [5 lb] <Insert value> 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-site; provide an accurate indication of color, texture, and
makeup of the material.
4. Weed Control Barrier: 12 by 12 inches.
5. Proprietary Root-Ball-Stabilization Device: One unit.
6. Slow-Release, Tree-Watering Device: One unit of each size required.
7. Edging Materials and Accessories: Manufacturer's standard size, to verify color selected.
8. Tree Grates[, Frames,] and Accessories: Manufacturer's standard size[ delivered to site
for review], to verify design[ and color] selected.
9. Root Barrier: Width of panel by 12 inches.
1.9 INFORMATIONAL SUBMITTALS
A. Qualification Data: For landscape Installer. Include list of similar projects completed by
Installer demonstrating Installer's capabilities and experience. Include project names, addresses,
and year completed, and include names and addresses of owners' contact persons.
B. Product Certificates: For each type of manufactured product, from manufacturer, and complying
with the following:
1. Manufacturer's certified analysis of standard products.
2. Analysis of other materials by a recognized laboratory made according to methods
established by the Association of Official Analytical Chemists, where applicable.
C. Pesticides and Herbicides: Product label and manufacturer's application instructions specific to
Project.
D. Sample Warranty: For special warranty.
1.10 CLOSEOUT SUBMITTALS
A. Maintenance Data: Recommended procedures to be established by Owner for maintenance of
plants during a calendar year. Submit before expiration of required maintenance periods.
1.11 QUALITY ASSURANCE
A. Installer Qualifications: A qualified landscape installer whose work has resulted in successful
establishment of plants.
1. Professional Membership: Installer shall be a member in good standing of either the
Professional Landcare Network or the American Nursery and Landscape Association.
2. Experience: [Three] [Five] <Insert number> years' experience in landscape installation
in addition to requirements in Section 014000 "Quality Requirements."
3. Installer's Field Supervision: Require Installer to maintain an experienced full-time
supervisor on Project site when work is in progress.
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4. Personnel Certifications: Installer's [field supervisor] [personnel assigned to the Work]
shall have certification in [one] [all] of the following categories from the Professional
Landcare Network:
a. Landscape Industry Certified Technician - Exterior.
b. Landscape Industry Certified Interior.
c. Landscape Industry Certified Horticultural Technician.
5. Pesticide Applicator: State licensed, commercial.
B. Provide quality, size, genus, species, and variety of plants indicated, complying with applicable
requirements in ANSI Z60.1.
1. Selection of plants purchased under allowances is made by Architect, who tags plants at
their place of growth before they are prepared for transplanting.
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 6 inches above the root
flare for trees up to 4-inch caliper size, and 12 inches above the root flare for larger sizes.
2. Other Plants: Measure with stems, petioles, and foliage in their normal position.
D. Plant Material Observation: Architect may 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. Architect may also observe trees and shrubs further for size and condition of balls
and root systems, pests, disease symptoms, injuries, and latent defects and may reject
unsatisfactory or defective material at any time during progress of work. Remove rejected trees
or shrubs immediately from Project site.
1. Notify Architect of sources of planting materials [seven] <Insert number> days in
advance of delivery to site.
1.12 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 compliance 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 materials with appropriate certificates.
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C. Deliver bare-root stock plants within [24 hours] [36 hours] <Insert time> of digging.
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. Transport in covered, temperature-
controlled vehicles, and keep plants cool and protected from sun and wind at all times.
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.
E. Handle planting stock by root ball.
F. Store bulbs, corms, and tubers in a dry place at 60 to 65 deg F until planting.
G. Apply antidesiccant to trees and shrubs using power spray to provide an adequate film over
trunks (before wrapping), branches, stems, twigs, and foliage to protect during digging,
handling, and transportation.
1. If deciduous trees or shrubs are moved in full leaf, spray with antidesiccant at nursery
before moving and again two weeks after planting.
H. 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.
I. 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 less than moist condition in water for two
hours. Reject plants with dry roots.
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 as often as necessary to maintain root systems in a moist, but not overly wet
condition.
1.13 FIELD 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. 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. Spring Planting: <Insert dates>.
2. Fall Planting: <Insert dates>.
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C. 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.
1.14 WARRANTY
A. Special Warranty: 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, except for defects resulting from abuse, lack of
adequate maintenance, or neglect by Owner.
b. Structural failures including plantings falling or blowing over.
c. Faulty performance of [tree stabilization] [edgings] [and] [tree grates] <Insert
item>.
d. Deterioration of metals, metal finishes, and other materials beyond normal
weathering.
2. Warranty Periods: From date of [planting completion] [Substantial Completion]
<Insert starting time>.
a. Trees, Shrubs, Vines, and Ornamental Grasses: [12] <Insert number> months.
b. Ground Covers, Biennials, Perennials, and Other Plants: [12] [Nine] [Six] [Three]
<Insert number> months.
c. Annuals: [Three] [Two] <Insert number> months.
3. 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 is required except for losses or
replacements due to failure to comply with requirements.
d. Provide extended warranty for period equal to original warranty period, for
replaced plant material.
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 List, Plant Schedule, or Plant Legend indicated
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,
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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 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 are
unacceptable.
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
begins at root flare according to ANSI Z60.1. Root flare shall be visible before planting.
D. Labeling: Label [each] [at least one] 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.
E. If formal arrangements or consecutive order of plants is indicated on Drawings, select stock for
uniform height and spread, and number the labels to assure symmetry in planting.
F. [Annuals] [and] [Biennials]: 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[ and that are in bud but not yet in bloom].
2.2 FERTILIZERS
A. Planting Tablets: Tightly compressed chip-type, long-lasting, slow-release, commercial-grade
planting fertilizer in tablet form. Tablets shall break down with soil bacteria, converting
nutrients into a form that can be absorbed by plant roots.
1. Size: [5-gram] [10-gram] [21-gram] <Insert size> tablets.
2. Nutrient Composition: 20 percent nitrogen, 10 percent phosphorous, and 5 percent
potassium, by weight plus micronutrients.
2.3 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: Medium size, hardwood bark and wood chips.
2. Size Range: 3 inches maximum, 1/2 inch minimum
3. Color: Natural.
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B. Compost Mulch: Well-composted, stable, and weed-free organic matter, pH of 5.5 to 8;
moisture content 35 to 55 percent by weight; 100 percent passing through a 1-inch sieve;
soluble-salt content of [2 to 5] <Insert range or value> dS/m; not exceeding 0.5 percent inert
contaminants and free of substances toxic to plantings; and as follows:
1. Organic Matter Content: [50 to 60] <Insert number range> percent of dry weight.
2. Feedstock: Agricultural, food, or industrial residuals; biosolids; yard trimmings; or
source-separated or compostable mixed solid waste.
C. 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: [Rounded riverbed gravel or smooth-faced stone] [Crushed stone or gravel]
[Marble chips] [Granite chips] <Insert stone type>.
2. Size Range: [1-1/2 inches maximum, 3/4 inch minimum] [3/4 inch maximum, 1/4 inch
minimum] <Insert dimensions>.
3. Color: [Uniform tan-beige color range acceptable to Architect] [Readily available
natural gravel color range] <Insert color>.
2.4 WEED-CONTROL BARRIERS
A. Nonwoven Geotextile Filter Fabric: Polypropylene or polyester fabric, 3 oz./sq. yd. minimum,
composed of fibers formed into a stable network so that fibers retain their relative position.
Fabric shall be inert to biological degradation and resist naturally encountered chemicals,
alkalis, and acids.
B. Composite Fabric: Woven, needle-punched polypropylene substrate bonded to a nonwoven
polypropylene fabric, 4.8 oz./sq. yd..
2.5 PESTICIDES
A. General: Pesticide registered and approved by the 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 Nonselective): 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 Nonselective): Effective for controlling weed growth
that has already germinated.
2.6 TREE-STABILIZATION MATERIALS
A. Trunk-Stabilization Materials:
1. Upright and Guy Stakes: Rough-sawn, sound, new [hardwood] [softwood with
specified wood pressure-preservative treatment], free of knots, holes, cross grain, and
other defects, 2-by-2-inch nominal by length indicated, pointed at one end.
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2. Wood Deadmen: Timbers measuring 8 inches in diameter and 48 inches long, treated
with specified wood pressure-preservative treatment.
3. Flexible Ties: Wide rubber or elastic bands or straps of length required to reach stakes or
[turnbuckles] [compression springs].
4. Guys and Tie Wires: ASTM A 641/A 641M, Class 1, galvanized-steel wire, two-strand,
twisted, 0.106 inch in diameter.
5. Tree-Tie Webbing: UV-resistant polypropylene or nylon webbing with brass grommets.
6. Guy Cables: Five-strand, 3/16-inch-diameter, galvanized-steel cable, with zinc-coated
[turnbuckles] [compression springs], a minimum of 3 inches long, with two 3/8-inch
galvanized eyebolts.
7. Flags: Standard surveyor's plastic flagging tape, white, 6 inches long.
8. Proprietary Staking-and-Guying Devices: Proprietary stake or anchor and adjustable tie
systems to secure each new planting by plant stem; sized as indicated and according to
manufacturer's written recommendations.
a. <Double click here to find, evaluate, and insert list of manufacturers and
products.>
B. Root-Ball Stabilization Materials:
1. Upright Stakes and Horizontal Hold-Down: Rough-sawn, sound, new hardwood or
softwood, free of knots, holes, cross grain, and other defects, 2-by-2-inch nominal by
length indicated; stakes pointed at one end.
2. Wood Screws: ASME B18.6.1.
3. Proprietary Root-Ball Stabilization Devices: Proprietary at- or below-grade stabilization
systems to secure each new planting by root ball and that do not encircle the trunk; sized
according to manufacturer's written recommendations unless otherwise indicated.
a. <Double click here to find, evaluate, and insert list of manufacturers and
products.>
2.7 LANDSCAPE EDGINGS
A. Steel Edging: Standard commercial-steel edging, fabricated in sections of standard lengths, with
loops stamped from or welded to face of sections to receive stakes.
1. <Double click here to find, evaluate, and insert list of manufacturers and products.>
2. Edging Size: [3/16 inch thick by 4 inches deep] [1/4 inch thick by 5 inches deep] [1/4
inch thick by 4 inches deep] [1/8 inch thick by 4 inches deep] [1/8 inch thick by 6
inches deep] [0.1 inch thick by 4 inches deep] <Insert dimensions>.
3. Stakes: Tapered steel, a minimum of [12 inches] [15 inches] <Insert dimension> long.
4. Accessories: Standard tapered ends, corners, and splicers.
5. Finish: [Manufacturer's standard paint] [Zinc coated] [Unfinished].
a. Paint Color: [Black] [Green] [Brown].
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2.8 TREE-WATERING DEVICES
A. Watering Pipe: PVC pipe 4 inches in diameter, site-cut to length as required, and with snug-
fitting removable cap.
B. Slow-Release Watering Device: Standard product manufactured for drip irrigation of plants and
emptying its water contents over [an extended time period] [two to nine hours] [two to three
weeks] <Insert number or range>; manufactured from UV-light-stabilized nylon-reinforced
polyethylene sheet, PVC, or HDPE plastic.
1. <Double click here to find, evaluate, and insert list of manufacturers and products.>
2. Color: [As selected by Architect from manufacturer's full range] [black] [dark
chocolate] [green] [or] [tan] <Insert color>.
2.9 MISCELLANEOUS PRODUCTS
A. Wood Pressure-Preservative Treatment: AWPA U1, Use Category UC4a; acceptable to
authorities having jurisdiction, and containing no arsenic or chromium.
B. Root Barrier: Black, molded, modular panels [18 inches] [24 inches] <Insert dimension> high
(deep), 85 mils thick, and with vertical root deflecting ribs protruding 3/4 inch out from panel
surface; manufactured with minimum 50 percent recycled polyethylene plastic with UV
inhibitors.
1. <Double click here to find, evaluate, and insert list of manufacturers and products.>
C. Antidesiccant: Water-insoluble emulsion, permeable moisture retarder, film forming, for trees
and shrubs. Deliver in original, sealed, and fully labeled containers and mix according to
manufacturer's written instructions.
D. Burlap: Non-synthetic, biodegradable.
E. Planter Drainage Gravel: Washed, sound crushed stone or gravel complying with
[ASTM D 448 for Size No. 8] <Insert requirements>.
F. Planter Filter Fabric: [Woven] [Nonwoven] geotextile manufactured for separation applications
and made of polypropylene, polyolefin, or polyester fibers or combination of them.
G. Mycorrhizal Fungi: Dry, granular inoculant containing at least 5300 spores per lb of vesicular-
arbuscular mycorrhizal fungi and 95 million spores per lb of ectomycorrhizal fungi, 33 percent
hydrogel, and a maximum of 5.5 percent inert material.
PART 3 - EXECUTION
3.1 EXAMINATION
A. Examine areas to receive plants, with Installer present, for compliance with requirements and
conditions affecting installation and performance of the Work.
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1. Verify that no foreign or deleterious material or liquid such as paint, paint washout,
concrete slurry, concrete layers or chunks, cement, plaster, oils, gasoline, diesel fuel,
paint thinner, turpentine, tar, roofing compound, or acid has been deposited in soil within
a planting area.
2. Verify that plants and vehicles loaded with plants can travel to planting locations with
adequate overhead clearance.
3. Suspend planting operations during periods of excessive soil moisture until the moisture
content reaches acceptable levels to attain the required results.
4. Uniformly moisten excessively dry soil that is not workable or which is dusty.
B. If contamination by foreign or deleterious material or liquid is present in soil within a planting
area, remove the soil and contamination as directed by Architect and replace with new planting
soil.
C. Proceed with installation only after unsatisfactory conditions have been corrected.
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. 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.
C. Lay out individual tree and shrub locations and areas for multiple plantings. Stake locations,
outline areas, adjust locations when requested, and obtain Architect's acceptance of layout
before excavating or planting. Make minor adjustments as required.
D. Lay out plants at locations directed by Architect. Stake locations of individual trees and shrubs
and outline areas for multiple plantings.
3.3 PLANTING AREA ESTABLISHMENT
A. General: Prepare planting area for soil placement and mix planting soil according to
[Section 329113 "Soil Preparation."] [Section 329115 "Soil Preparation (Performance
Specification)."]
B. Placing Planting Soil: [Place and mix planting soil in-place over exposed subgrade] [Place
manufactured planting soil over exposed subgrade] [Blend planting soil in place] <Insert
requirement>.
C. Before planting, obtain Architect's acceptance of finish grading; restore planting areas if eroded
or otherwise disturbed after finish grading.
D. Application of Mycorrhizal Fungi: At time directed by Architect, broadcast dry product
uniformly over prepared soil at application rate [indicated on Drawings] [according to
manufacturer's written recommendations] <Insert application rate>.
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3.4 EXCAVATION FOR TREES AND SHRUBS
A. Planting Pits and Trenches: Excavate circular planting pits.
1. Excavate planting pits with sides sloping inward at a 45-degree angle. Excavations with
vertical sides are unacceptable. 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 root ball will sit on undisturbed base soil to prevent settling.
Scarify sides of planting pit smeared or smoothed during excavation.
2. Excavate approximately three times as wide as ball diameter for [balled and burlapped]
[balled and potted] [container-grown] [fabric bag-grown] stock.
3. Excavate at least 12 inches wider than root spread and deep enough to accommodate
vertical roots for bare-root stock.
4. Do not excavate deeper than depth of the root ball, measured from the root flare to the
bottom of the root ball.
5. 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.
6. Maintain angles of repose of adjacent materials to ensure stability. Do not excavate
subgrades of adjacent paving, structures, hardscapes, or other new or existing
improvements.
7. Maintain supervision of excavations during working hours.
8. Keep excavations covered or otherwise protected [overnight] [after working hours]
[when unattended by Installer's personnel].
9. If drain tile is indicated on Drawings or required under planting areas, excavate to top of
porous backfill over tile.
B. Backfill Soil: Subsoil and topsoil removed from excavations [may] [may not] be used as
backfill soil unless otherwise indicated.
C. Obstructions: Notify Architect if unexpected rock or obstructions detrimental to trees or shrubs
are encountered in excavations.
1. Hardpan Layer: Drill 6-inch-diameter holes, 24 inches apart, into free-draining strata or
to a depth of 10 feet, whichever is less, and backfill with free-draining material.
D. Drainage: Notify Architect 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, AND VINE PLANTING
A. Inspection: At time of 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. Roots: Remove stem girdling roots and kinked roots. Remove injured roots by cutting cleanly;
do not break.
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C. Balled and Burlapped Stock: Set each plant plumb and in center of planting pit or trench with
root flare [1 inch above] [2 inches above] <Insert requirement> adjacent finish grades.
1. Backfill: Planting soil <Insert drawing designation>.[ For trees, use excavated soil for
backfill.]
2. After placing some backfill around root ball to stabilize plant, carefully cut and remove
burlap, rope, and wire baskets from tops of root balls and from sides, but do not remove
from under root balls. Remove pallets, if any, before setting. Do not use planting stock if
root ball is cracked or broken before or during planting operation.
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. Place planting tablets equally distributed around each planting pit when pit is
approximately one-half filled. Place tablets beside the root ball about 1 inch from root
tips; do not place tablets in bottom of the hole.
a. Quantity: [As indicated on Drawings] [Two per plant] [Three for each caliper
inch of plant] <Insert requirement>.
5. Continue backfilling process. Water again after placing and tamping final layer of soil.
D. [Balled and Potted] [and] [Container-Grown] Stock: Set each plant plumb and in center of
planting pit or trench with root flare [1 inch above] [2 inches above] <Insert requirement>
adjacent finish grades.
1. Backfill: Planting soil <Insert drawing designation>.[ For trees, use excavated 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. Place planting tablets equally distributed around each planting pit when pit is
approximately one-half filled. Place tablets beside the root ball about 1 inch from root
tips; do not place tablets in bottom of the hole.
a. Quantity: [As indicated on Drawings] [Two per plant] [Three for each caliper
inch of plant] <Insert requirement>.
5. Continue backfilling process. Water again after placing and tamping final layer of soil.
E. Fabric Bag-Grown Stock: Set each plant plumb and in center of planting pit or trench with root
flare [1 inch above] [2 inches above] <Insert requirement> adjacent finish grades.
1. Backfill: Planting soil <Insert drawing designation>.[ For trees, use excavated soil for
backfill.]
2. Carefully remove root ball from fabric bag without damaging root ball or plant. Do not
use planting stock if root ball is cracked or broken before or during planting operation.
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.
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4. Place planting tablets equally distributed around each planting pit when pit is
approximately one-half filled. Place tablets beside the root ball about 1 inch from root
tips; do not place tablets in bottom of the hole.
a. Quantity: [As indicated on Drawings] [Two per plant] [Three for each caliper
inch of plant] <Insert requirement>.
5. Continue backfilling process. Water again after placing and tamping final layer of soil.
F. Bare-Root Stock: Set and support each plant in center of planting pit or trench with root flare [1
inch above] [2 inches above] <Insert requirement> adjacent finish grade.
1. Backfill: Planting soil <Insert drawing designation>.[ For trees, use excavated soil for
backfill.]
2. Spread roots without tangling or turning toward surface. Plumb before backfilling, and
maintain plumb while working.
3. Carefully work backfill in layers around roots by hand. Bring roots into close contact
with the soil.
4. When planting pit is approximately one-half filled, water thoroughly before placing
remainder of backfill. Repeat watering until no more water is absorbed.
5. Place planting tablets equally distributed around each planting pit when pit is
approximately one-half filled. Place tablets beside soil-covered roots about 1 inch from
root tips; do not place tablets in bottom of the hole or touching the roots.
a. Quantity: [As indicated on Drawings] [Two per plant] [Three for each caliper
inch of plant] <Insert requirement>.
6. Continue backfilling process. Water again after placing and tamping final layer of soil.
G. Watering Pipe: During backfilling, install watering pipe 4 feet deep into the planting pit outside
the root ball [as indicated on Drawings] [and] [with top of pipe 1 inch above the mulched
surface].
H. Slopes: 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.
3.6 MECHANIZED TREE-SPADE PLANTING
A. Trees [shall] [may] be planted with an approved mechanized tree spade at the designated
locations. Do not use tree spade to move trees larger than the maximum size allowed for a
similar field-grown, balled-and-burlapped root-ball diameter according to ANSI Z60.1, or larger
than manufacturer's maximum size recommendation for the tree spade being used, whichever is
smaller.
B. Use the same tree spade to excavate the planting hole as will be used to extract and transport the
tree.
C. When extracting the tree, center the trunk within the tree spade and move tree with a solid ball
of earth.
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D. Cut exposed roots cleanly during transplanting operations.
E. Plant trees following procedures in "Tree, Shrub, and Vine Planting" Article.
F. Where possible, orient the tree in the same direction as in its original location.
3.7 TREE, SHRUB, AND VINE PRUNING
A. Remove only dead, dying, or broken branches. Do not prune for shape.
B. Prune, thin, and shape trees, shrubs, and vines as directed by Architect.
C. Prune, thin, and shape trees, shrubs, and vines according to standard professional horticultural
and arboricultural practices. Unless otherwise indicated by Architect, do not cut tree leaders;
remove only injured, dying, or dead branches from trees and shrubs; and prune to retain natural
character.
D. Do not apply pruning paint to wounds.
3.8 TREE STABILIZATION
A. Trunk Stabilization by Upright Staking and Tying: Install trunk stabilization as follows unless
otherwise indicated:
1. Upright Staking and Tying: Stake trees of 2- through 5-inch caliper. Stake trees of less
than 2-inch caliper only as required to prevent wind tip out. Use a minimum of two stakes
of length required to penetrate at least 18 inches below bottom of backfilled excavation
and to extend [to the dimension indicated on Drawings] [at least 72 inches] [one-third
of trunk height] <Insert dimension or requirement> above grade. Set vertical stakes
and space to avoid penetrating root balls or root masses.
2. Upright Staking and Tying: Stake trees with two stakes for trees up to 12 feet high and 2-
1/2 inches or less in caliper; three stakes for trees less than 14 feet high and up to 4 inches
in caliper. Space stakes equally around trees.
3. Support trees with bands of flexible ties at contact points with tree trunk. Allow enough
slack to avoid rigid restraint of tree.
4. Support trees with two strands of tie wire, connected to the brass grommets of tree-tie
webbing at contact points with tree trunk. Allow enough slack to avoid rigid restraint of
tree.
B. Trunk Stabilization by Staking and Guying: Install trunk stabilization as follows unless
otherwise indicated on Drawings. Stake and guy trees more than 14 feet in height and more than
3 inches in caliper unless otherwise indicated.
1. Site-Fabricated, Staking-and-Guying Method: Install no fewer than three guys spaced
equally around tree.
a. Securely attach guys to stakes 30 inches long, driven to grade. Adjust spacing to
avoid penetrating root balls or root masses. Provide [turnbuckle] [compression
spring] for each guy wire and tighten securely.
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b. For trees more than [6 inches in caliper] <Insert size>, anchor guys to wood
deadmen buried at least 36 inches below grade. Provide [turnbuckle]
[compression spring] for each guy wire and tighten securely.
c. Support trees with bands of flexible ties at contact points with tree trunk and
reaching to [turnbuckle] [compression spring]. Allow enough slack to avoid
rigid restraint of tree.
d. Support trees with [guy cable] [or] [multiple strands of tie wire], connected to
the brass grommets of tree-tie webbing at contact points with tree trunk and
reaching to [turnbuckle] [compression spring]. Allow enough slack to avoid
rigid restraint of tree.
e. Attach flags to each guy wire, 30 inches above finish grade.
f. Paint [turnbuckles] [compression springs] with luminescent white paint.
2. Proprietary Staking and Guying Device: Install staking and guying system sized and
positioned as recommended by manufacturer unless otherwise indicated and according to
manufacturer's written instructions.
C. Root-Ball Stabilization: Install at- or below-grade stabilization system to secure each new
planting by the root ball unless otherwise indicated.
1. Wood Hold-Down Method: Place vertical stakes against side of root ball and drive them
into subsoil; place horizontal wood hold-down stake across top of root ball and screw at
each end to one of the vertical stakes.
a. Install stakes of length required to penetrate at least [to the dimension indicated
on Drawings] [18 inches] <Insert dimension> below bottom of backfilled
excavation. Saw stakes off at horizontal stake.
b. Install screws through horizontal hold-down and penetrating at least 1 inch into
stakes. Predrill holes if necessary to prevent splitting wood.
c. Install second set of stakes on other side of root trunk for larger trees.
2. Proprietary Root-Ball Stabilization Device: Install root-ball stabilization system sized and
positioned as recommended by manufacturer unless otherwise indicated and according to
manufacturer's written instructions.
3.9 ROOT-BARRIER INSTALLATION
A. Install root barrier where trees are planted within [60 inches] [48 inches] <Insert dimension>
of paving or other hardscape elements, such as walls, curbs, and walkways, unless otherwise
indicated on Drawings.
B. Align root barrier [vertically] [with bottom edge angled at 20 degrees away from the paving
or other hardscape element], and run it linearly along and adjacent to the paving or other
hardscape elements to be protected from invasive roots.
C. Install root barrier continuously for a distance of [60 inches] <Insert dimension> in each
direction from the tree trunk, for a total distance of [10 feet] <Insert dimension> per tree. If
trees are spaced closer, use a single continuous piece of root barrier.
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1. Position top of root barrier [flush with finish grade] [1/2 inch above finish grade]
[according to manufacturer's written recommendations].
2. Overlap root barrier a minimum of 12 inches at joints.
3. Do not distort or bend root barrier during construction activities.
4. Do not install root barrier surrounding the root ball of tree.
3.10 PLACING SOIL IN PLANTERS
A. Place a layer of drainage gravel at least 4 inches thick in bottom of planter. Cover bottom with
filter fabric and wrap filter fabric [4 inches] [6 inches] <Insert dimension> up on all sides.
Duct tape along the entire top edge of the filter fabric, to secure the filter fabric against the sides
during the soil-filling process.
B. Fill planter with planting soil <Insert drawing designation>. Place soil in lightly compacted
layers to an elevation of 1-1/2 inches below top of planter, allowing natural settlement.
3.11 GROUND COVER AND PLANT PLANTING
A. Set out and space ground cover and plants other than trees, shrubs, and vines [9 inches apart]
[12 inches apart] [18 inches apart] [24 inches apart] [as indicated on Drawings] in even
rows with triangular spacing.
B. Use planting soil <Insert drawing designation> for backfill.
C. Dig holes large enough to allow spreading of roots.
D. For rooted cutting plants supplied in flats, plant each in a manner that minimally disturbs the
root system but to a depth not less than two nodes.
E. Work soil around roots to eliminate air pockets and leave a slight saucer indentation around
plants to hold water.
F. Water thoroughly after planting, taking care not to cover plant crowns with wet soil.
G. Protect plants from hot sun and wind; remove protection if plants show evidence of recovery
from transplanting shock.
3.12 PLANTING AREA MULCHING
A. Install weed-control barriers before mulching according to manufacturer's written instructions.
Completely cover area to be mulched, overlapping edges a minimum of [6 inches] [12 inches]
and secure seams with galvanized pins.
B. Mulch backfilled surfaces of planting areas and other areas indicated.
1. Trees and Treelike Shrubs in Turf Areas: Apply organic mulch ring of 4- inch average
thickness, with [12-inch] [24-inch] [36-inch] <Insert dimension> radius around trunks
or stems. Do not place mulch within 3 inches of trunks or stems.
a. Apply mulch at one (1) cubic yard per eighty (80) square feet
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2. Organic Mulch in Planting Areas: Apply 4-inch average thickness of organic mulch
extending 12 inches beyond edge of individual planting pit or trench and over whole
surface of planting area, and finish level with adjacent finish grades. Do not place mulch
within 3 inches of trunks or stems.
a. Apply mulch at one (1) cubic yard per eighty (80) square feet
3. Mineral Mulch in Planting Areas: Apply [2-inch] [3-inch] <Insert dimension> average
thickness of mineral mulch [extending 12 inches beyond edge of individual planting
pit or trench] [and] [over whole surface of planting area], and finish level with
adjacent finish grades. Do not place mulch within [3 inches] [6 inches] <Insert
distance> of trunks or stems.
3.13 EDGING INSTALLATION
A. Wood Edging: Install edging where indicated.[ Mitre cut joints and connections at a 45-
degree angle.] Fasten each cut joint or connection with two galvanized nails. Anchor with
wood stakes spaced up to 36 inches apart, driven at least 1 inch below top elevation of edging.
Use two galvanized nails per stake to fasten edging, of length as needed to penetrate both
edging and stake and provide 1/2-inch clinch at point. Predrill stakes if needed to avoid
splitting. Replace stakes that crack or split during installation process.
B. Steel Edging: Install steel edging where indicated according to manufacturer's written
instructions. Anchor with steel stakes spaced approximately 30 inches apart, driven below top
elevation of edging.
C. Aluminum Edging: Install aluminum edging where indicated according to manufacturer's
written instructions. Anchor with aluminum stakes spaced approximately [36 inches] [48
inches] apart, driven below top elevation of edging.
D. Plastic Edging: Install plastic edging where indicated according to manufacturer's written
instructions. Anchor with steel stakes spaced approximately [36 inches] [48 inches] apart,
driven through upper base grooves or V-lip of edging.
E. Shovel-Cut Edging: Separate mulched areas from turf areas[, curbs, and paving] with a 45-
degree, 4- to 6-inch-deep, shovel-cut edge[ as indicated on Drawings].
F. Mow-Strip Installation:
1. Excavate for mow strip[ as indicated on Drawings].
2. Compact subgrade uniformly beneath mow strip.
3. Apply nonselective, pre-emergent herbicide that inhibits growth of grass and weeds.
4. Install [wood] [steel] [aluminum] [plastic] edging, delineating the edge of mow strip.
5. Install weed-control barrier before mulching, covering area of mow strip, and
overlapping and pinning edges of barrier at least 6 inches and according to manufacturer's
written instructions.
6. Place indicated thickness of [organic] [mineral] mulch, fully covering weed barrier.
7. Rake mulch to a uniform surface level with adjacent finish grades.
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3.14 INSTALLING SLOW-RELEASE WATERING DEVICE
A. Provide one device for each tree.
B. Place device on top of the mulch at base of tree stem and fill with water according to
manufacturer's written instructions.
3.15 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.
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.
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 when possible to minimize use
of pesticides and reduce hazards. Treatments include physical controls such as hosing off
foliage, mechanical controls such as traps, and biological control agents.
3.16 PESTICIDE APPLICATION
A. Apply pesticides and other chemical products and biological control agents according to
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 Nonselective): Apply to tree, shrub, and ground-cover
areas according to manufacturer's written recommendations. Do not apply to seeded areas.
C. Post-Emergent Herbicides (Selective and Nonselective): Apply only as necessary to treat
already-germinated weeds and according to manufacturer's written recommendations.
3.17 REPAIR AND REPLACEMENT
A. General: Repair or replace existing or new trees and other plants that are damaged by
construction operations, in a manner approved by Architect.
1. Submit details of proposed pruning and repairs.
2. Perform repairs of damaged trunks, branches, and roots within 24 hours, if approved.
3. Replace trees and other plants that cannot be repaired and restored to full-growth status,
as determined by Architect.
B. Remove and replace trees that are more than [25] <Insert number> percent dead or in an
unhealthy condition[ before the end of the corrections period] or are damaged during
construction operations that Architect determines are incapable of restoring to normal growth
pattern.
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1. Provide new trees of same size as those being replaced for each tree of [6 inches] [4
inches] <Insert dimension> or smaller in caliper size.
2. Provide [one] [two] <Insert number> new tree(s) of [6-inch] [4-inch] <Insert
dimension> caliper size for each tree being replaced that measures more than [6 inches]
[4 inches] in caliper size.
3. Species of Replacement Trees: [Same species being replaced] [Species selected by
Architect] <Insert species>.
3.18 CLEANING AND PROTECTION
A. During planting, keep adjacent paving and construction clean and work area in an orderly
condition. Clean wheels of vehicles before leaving site to avoid tracking soil onto roads, walks,
or other paved areas.
B. Remove surplus soil and waste material including excess subsoil, unsuitable soil, trash, and
debris and legally dispose of them off Owner's property.
C. 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.
D. After installation and before [Substantial Completion] <Insert time>, remove nursery tags,
nursery stakes, tie tape, labels, wire, burlap, and other debris from plant material, planting areas,
and Project site.
E. At time of Substantial Completion, verify that tree-watering devices are in good working order
and leave them in place. Replace improperly functioning devices.
3.19 MAINTENANCE SERVICE
A. Maintenance Service for Trees and Shrubs: Provide maintenance by skilled employees of
landscape Installer. Maintain as required in "Plant Maintenance" Article. Begin maintenance
immediately after plants are installed and continue until plantings are acceptably healthy and
well established, but for not less than maintenance period below:
1. Maintenance Period: [12] [Six] [Three] months from date of [planting completion]
[Substantial Completion] <Insert starting time>.
B. Maintenance Service for Ground Cover and Other Plants: Provide maintenance by skilled
employees of landscape Installer. Maintain as required in "Plant Maintenance" Article. Begin
maintenance immediately after plants are installed and continue until plantings are acceptably
healthy and well established, but for not less than maintenance period below:
1. Maintenance Period: [Six] [Three] months from date of [planting completion]
[Substantial Completion] <Insert starting time>.
END OF SECTION 329300
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