HomeMy WebLinkAboutFile Documents.754 Moore Dr.0034.2018 (37).ARBK754 Moore Drive, Aspen, CO 81611 December 2018
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. Landscape edgings.
B. Related Sections:
1. Section 329200 "Turf and Grasses" for turf (lawn) and meadow planting, and
hydroseeding.
1.3 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 ball size not less than sizes indicated; 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.
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 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. Duff Layer: The surface layer of native topsoil that is composed of mostly decayed leaves,
twigs, and detritus.
G. 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.
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Water Efficient Landscaping
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Fabric bag size is not less than diameter, depth, and volume required by ANSI Z60.1 for type
and size of plant.
H. Finish Grade: Elevation of finished surface of planting soil.
I. Manufactured Topsoil: Soil produced off-site by homogeneously blending mineral soils or sand
with stabilized organic soil amendments to produce planting soil.
J. 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.
K. 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.
L. Planting Area: Areas to be planted.
M. Planting Soil: 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. Refer to Section 329300 “Plants” for
requirements.
N. 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.
O. 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.
P. Stem Girdling Roots: Roots that encircle the stems (trunks) of trees below the soil surface.
Q. Subgrade: Surface or elevation of subsoil remaining after excavation is complete, or the top
surface of a fill or backfill before planting soil is placed.
R. Subsoil: All soil beneath the topsoil layer of the soil profile, and typified by the lack of organic
matter and soil organisms.
S. 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.
1.4 ACTION SUBMITTALS
A. Product Data: For each type of product indicated, including soils.
1. Plant Materials: Include quantities, sizes, quality, and sources for plant materials.
2. Pesticides and Herbicides: Include product label and manufacturer's application
instructions specific to the Project.
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3. Plant Photographs: Include color photographs in digital format of each required species
and size of plant material as it will be furnished to the 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. Identify each photograph with
the full scientific name of the plant, plant size, and name of the growing nursery.
Photographs shall be at minimum resolution of standard 1280x720 definition.
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. Edging Materials and Accessories: Manufacturer's standard size, to verify color selected.
C. Product Certificates: For each type of Sod or Chemical product, from manufacturer, and
complying with the following:
1. Manufacturer's certified analysis of standard products.
1.5 INFORMATIONAL SUBMITTALS
A. Material Test Reports: For salvaged native surface topsoil, existing in-place surface soil and
imported or manufactured topsoil.
B. Materials Recommendation Reports: Provided recommendation of chemical and mechanical
means of modification for all soils by a certified testing or soils science laboratory.
C. Maintenance Instructions: Recommended procedures to be established by Owner for
maintenance of plants during a calendar year. Submit before start of required maintenance
periods.
D. Warranty: Sample of special warranty.
1.6 QUALITY ASSURANCE
A. Soil-Testing Laboratory Qualifications: An independent laboratory or university laboratory,
recognized by the State Department of Agriculture, with the experience and capability to
conduct the testing indicated and that specializes in types of tests to be performed.
B. Soil Analysis: For each unamended soil type, furnish soil analysis and a written report by a
qualified soil-testing laboratory stating percentages of organic matter; gradation of sand, silt,
and clay content; cation exchange capacity;deleterious material; pH; and mineral and plant-
nutrient content of the soil.
1. Testing methods and written recommendations shall comply with USDA's Handbook
No. 60.
2. A representative sample shall be taken for each soil to be used or amended for planting
purposes.
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3. Report suitability of tested soil for turf growth.
a. Based on the test results, state recommendations for soil treatments and soil
amendments to be incorporated. State recommendations in weight per 1000 sq. ft.
or volume per cu. yd. for nitrogen, phosphorus, and potash nutrients and soil
amendments to be added to produce satisfactory planting soil suitable for healthy,
viable plants.
b. Report presence of problem salts, minerals, or heavy metals, including aluminum,
arsenic, barium, cadmium, chromium, cobalt, lead, lithium, and vanadium. If such
problem materials are present, provide additional recommendations for corrective
action.
C. 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 will be made by Landscape Architect,
who will tag plants at their place of growth before they are prepared for transplanting.
D. 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.
E. Plant Material Observation: Landscape 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. Landscape Architect 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 Landscape Architect of sources of planting materials seven days in advance of
delivery to site.
1.7 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.
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3. Accompany each delivery of bulk fertilizers, lime, and soil amendments with appropriate
certificates.
C. Bare-root stock plants are not allowed in Project.
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. 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. Set balled stock on ground and cover ball with soil, peat moss, sawdust, or other
acceptable material.
2. Do not remove container-grown stock from containers before time of planting.
3. 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.
1.8 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. Do not proceed with interruption of services or utilities without Owner's written
permission.
C. Planting Restrictions: Plant during one of the following periods unless written approval granted
by Landscape Architect stating otherwise. Coordinate planting periods with maintenance
periods to provide required maintenance from date of Substantial Completion.
1. Spring Planting: April 15.
2. Fall Planting: October 31.
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.
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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.
1. When planting trees, shrubs, and other plants after planting turf areas, protect turf areas,
and promptly repair damage caused by planting operations.
1.9 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, or incidents that are beyond
Contractor's control.
b. Structural failures including plantings falling or blowing over.
c. Faulty performance of tree stabilization and edgings.
d. Deterioration of metals, metal finishes, and other materials beyond normal
weathering.
2. Warranty Periods from Date of Substantial Completion:
a. Trees, Shrubs, Vines, and Ornamental Grasses: 24 months.
b. Ground Covers, Biennials, Perennials, and Other Plants: 12 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 will be 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.
1.10 MAINTENANCE SERVICE
A. Initial Maintenance Service for Trees and Shrubs: Provide maintenance by skilled employees
of landscape Installer. Maintain as required in Part 3. 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: Three planting season months from date of Substantial Completion.
B. Initial Maintenance Service for Ground Cover and Other Plants: Provide maintenance by
skilled employees of landscape Installer. Maintain as required in Part 3. Begin maintenance
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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: Three planting season months from date of Substantial Completion.
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 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 Landscape
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.
D. Labeling: Label 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 as shown on Drawings.
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.
2.2 INORGANIC SOIL AMENDMENTS
A. Lime: ASTM C 602, agricultural liming material containing a minimum of 80 percent calcium
carbonate equivalent and as required.
B. Sulfur: Granular, biodegradable, containing a minimum of 90 percent sulfur, and with a
minimum of 99 percent passing through No. 6 sieve and a maximum of 10 percent passing
through No. 40 sieve.
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C. Iron Sulfate: Granulated ferrous sulfate containing a minimum of 20 percent iron and 10
percent sulfur.
D. Aluminum Sulfate: Commercial grade, unadulterated.
E. Perlite: Horticultural perlite, soil amendment grade.
F. Agricultural Gypsum: Minimum 90 percent calcium sulfate, finely ground with 90 percent
passing through No. 50 sieve.
G. Sand: Clean, washed, natural or manufactured, and free of toxic materials.
H. Diatomaceous Earth: Calcined, 90 percent silica, with approximately 140 percent water
absorption capacity by weight.
I. Zeolites: Mineral clinoptilolite with at least 60 percent water absorption by weight.
2.3 ORGANIC SOIL AMENDMENTS
A. Compost: Well-composted, stable, and weed-free organic matter, pH range of 5.5 to 8;
moisture content 35 to 55 percent by weight; 100 percent passing through 3/4-inch sieve;
soluble salt content of 5 to 10 decisiemens/m; not exceeding 0.5 percent inert contaminants and
free of substances toxic to plantings; and as follows:
B. Sphagnum Peat: Partially decomposed sphagnum peat moss, finely divided or of granular
texture, with a pH range of 3.4 to 4.8.
C. Manure: Well-rotted, unleached, stable or cattle manure containing not more than 25 percent by
volume of straw, sawdust, or other bedding materials; free of toxic substances, stones, sticks,
soil, weed seed, and material harmful to plant growth.
2.4 FERTILIZERS
A. Bonemeal: Commercial, raw or steamed, finely ground; a minimum of 1 percent nitrogen and
10 percent phosphoric acid.
B. Superphosphate: Commercial, phosphate mixture, soluble; a minimum of 20 percent available
phosphoric acid.
C. Commercial Fertilizer: Commercial-grade complete fertilizer of neutral character, consisting of
fast- and slow-release nitrogen, 50 percent derived from natural organic sources of urea
formaldehyde, phosphorous, and potassium in a composition as recommended in the soils
analysis from a qualified soil-testing laboratory.
D. Slow-Release Fertilizer: Granular or pelleted fertilizer consisting of 50 percent water-insoluble
nitrogen, phosphorus, and potassium in a composition as recommended in the soils analysis
from a qualified soil-testing laboratory.
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2.5 PLANTING SOILS
A. Planting Soil: Existing, native surface topsoil formed under natural conditions with the duff
layer retained during excavation process and stockpiled on-site. Verify suitability of native
surface topsoil to produce viable planting soil. Clean soil of roots, plants, sod, stones, clay
lumps, and other extraneous materials harmful to plant growth.
1. Supplement with Planting Soil Type 2 when quantities are insufficient.
2. Mix stripped and stockpiled native surface topsoil with the soil amendments and
fertilizers according to the recommendations set forth by the soils-testing laboratory soils
analysis to produce planting soil.
B. Planting Soil Type 2: Imported topsoil or manufactured topsoil from off-site sources. Obtain
topsoil displaced from naturally well-drained construction or mining sites where topsoil occurs
at least 4 inches deep; do not obtain from agricultural land, bogs or marshes.
1. Additional Properties of Imported Topsoil or Manufactured Topsoil: Screened and free
of stones 1 inch or larger in any dimension; free of roots, plants, sod, clods, clay lumps,
pockets of coarse sand, paint, paint washout, concrete slurry, concrete layers or chunks,
cement, plaster, building debris, oils, gasoline, diesel fuel, paint thinner, turpentine, tar,
roofing compound, acid, and other extraneous materials harmful to plant growth; free of
obnoxious weeds and invasive plants including quackgrass, Johnsongrass, poison ivy,
nutsedge, nimblewill, Canada thistle, bindweed, bentgrass, wild garlic, ground ivy,
perennial sorrel, and bromegrass; not infested with nematodes, grubs, other pests, pest
eggs, or other undesirable organisms and disease-causing plant pathogens; friable and
with sufficient structure to give good tilth and aeration. Continuous, air-filled, pore-
space content on a volume/volume basis shall be at least 15 percent when moisture is
present at field capacity. Soil shall have a field capacity of at least 15 percent on a dry
weight basis.
2. Mix imported topsoil or manufactured topsoil with the soil amendments and fertilizers
according to the recommendations set forth by the soils-testing laboratory soils analysis
to produce planting soil.
3. Provide imported or manufactured topsoil when quantities of on-site, stripped, stockpiled,
and amended topsoil are insufficient.
2.6 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, 1-1/2 inch minimum.
3. Color: Natural.
2.7 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
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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.
2.8 TREE STABILIZATION MATERIALS
A. Stakes and Guys:
1. Upright and Guy Stakes: Rough-sawn, sound, new hardwood, free of knots, holes, cross
grain, and other defects, 2-by-2-inch nominal by length indicated, pointed at one end.
2. Flexible Ties: Wide rubber or elastic bands or straps of length required to reach stakes or
turnbuckles.
3. Guys and Tie Wires: ASTM A 641/A 641M, Class 1, galvanized-steel wire, two-strand,
twisted, 0.106 inch in diameter.
4. Tree Straps: 12 inch, woven polypropylene with brass grommets, minimum tear strength
of 200 lbs., color – beige.
5. Tree-Tie Webbing: UV-resistant polypropylene or nylon webbing with brass grommets.
6. Flags: Standard surveyor's plastic flagging tape, white, 6 inches long.
2.9 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. Basis of Design Product: Steel landscape edging, as manufactured by Pro-Steel, Fort
Worth, TX, 817-572-4959 or approved equal.
2. Edging Size: 3/16 inch thick by 4 inches deep, 14 Gauge.
3. Stakes: Tapered steel, a minimum of 12 inches long.
4. Accessories: Standard tapered ends, corners, and splicers.
5. Finish: Manufacturer's standard powder coat paint.
a. Paint Color: Black.
2.10 MISCELLANEOUS PRODUCTS
A. 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.
B. Burlap: Non-synthetic, biodegradable.
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PART 3 - EXECUTION
3.1 EXAMINATION
A. 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 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. Do not mix or place soils and soil amendments in frozen, wet, or muddy conditions.
3. 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.
4. Uniformly moisten excessively dry soil that is not workable and which is too dusty.
B. Proceed with installation only after unsatisfactory conditions have been corrected.
C. 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 Landscape Architect 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. Install erosion-control measures in accordance with Section 312500 “Erosion and
Sedimentation Control.
C. Lay out plants at locations directed by Landscape Architect. Stake locations of individual trees
and shrubs and outline areas for multiple plantings.
D. 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.
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. General: Prepare planting areas for soil placement and mix planting soil according to Section
329113 “Soil Preparation.”
B. Placing Planting Soil: In accordance with Section 329113 “Soil Preparation.”
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C. Before planting, obtain Landscape Architect's acceptance of finish grading; restore planting
areas if eroded or otherwise disturbed after finish grading.
3.4 EXCAVATION FOR TREES AND SHRUBS
A. Planting Pits and Trenches: 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 root ball will sit on undisturbed base soil
to prevent settling. Scarify sides of planting pit smeared or smoothed during excavation.
1. Excavate approximately three times as wide as ball diameter for balled and burlapped and
container-grown stock.
2. Excavate at least 12 inches wider than root spread and deep enough to accommodate
vertical roots for bare-root stock.
3. Do not excavate deeper than depth of the root ball, measured from the root flare to the
bottom of the root ball.
4. 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.
5. 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.
6. Maintain supervision of excavations during working hours.
7. Keep excavations covered or otherwise protected after working hours.
8. If drain tile is shown on Drawings or required under planting areas, excavate to top of
porous backfill over tile.
B. Subsoil and topsoil removed from excavations may be used as planting soil if comply with the
requirements set forth in the Section 329113 “Soil Preparation.”
C. Obstructions: Notify Landscape 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 Landscape 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 AND SHRUB 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.
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B. Remove stem girdling roots and kinked roots. Remove injured roots by cutting cleanly; do not
break.
C. Set balled and burlapped stock plumb and in center of planting pit or trench with root flare 2
inches above adjacent finish grades.
1. Use planting 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 in each planting pit when pit is approximately one-half filled; in
amounts recommended in soil reports from soil-testing laboratory. Place tablets beside
the root ball about 1 inch from root tips; do not place tablets in bottom of the hole.
5. Continue backfilling process. Water again after placing and tamping final layer of soil.
D. Set container-grown or balled and potted stock plumb and in center of planting pit or trench
with root flare 2 inches above adjacent finish 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. Place planting tablets in each planting pit when pit is approximately one-half filled; in
amounts recommended in soil reports from soil-testing laboratory. Place tablets beside
the root ball about 1 inch from root tips; do not place tablets in bottom of the hole.
5. Continue backfilling process. Water again after placing and tamping final layer of soil.
E. 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. Large caliper trees 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 the manufacturer's maximum size recommendation for the tree spade being used,
whichever is smaller.
B. When extracting the tree, center the trunk within the tree spade and move tree with a solid ball
of earth.
C. Cut exposed roots cleanly during transplanting operations.
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D. Use the same tree spade to excavate the planting hole as was used to extract and transport the
tree.
E. Plant trees as shown on Drawings, following procedures in "Tree and Shrub Planting" Article.
F. Where possible, orient the tree in the same direction as in its original location.
3.7 TREE AND SHRUB PRUNING
A. Remove only dead, dying, or broken branches. Do not prune for shape.
B. Prune, thin, and shape trees and shrubs as directed by Landscape Architect and Arborist.
C. Do not apply pruning paint to wounds.
3.8 TREE STABILIZATION
A. 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 shown on Drawings above grade. Set vertical
stakes and space to avoid penetrating root balls or root masses.
2. Use 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 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. Staking and Guying: Stake and guy trees more than 14 feet in height and more than 3 inches in
caliper unless otherwise indicated. Securely attach no fewer than three guys to stakes 30 inches
long, driven to grade.
3.9 GROUND COVER AND PLANT PLANTING
A. Set out and space ground cover and plants other than trees and shrubs as indicated in even rows
with triangular spacing.
B. Use planting soil 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 will minimally disturb 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.
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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.
3.10 PLANTING AREA MULCHING
A. Mulch backfilled surfaces of planting areas and other areas indicated.
1. Trees and Tree-like Shrubs in Turf Areas: Apply organic mulch ring of 4-inch average
thickness, with 24-inch radius around trunks or stems. Do not place mulch within 6
inches of trunks or stems.
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.
3.11 EDGING INSTALLATION
A. Metal Edging: Install metal edging where indicated according to manufacturer's written
instructions. Anchor with metal stakes spaced approximately 36 inches apart, driven below top
elevation of edging.
3.12 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.
C. Apply treatments as required to keep plant materials, planted areas, and soils free of pests and
pathogens or disease. Use integrated past 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.
3.13 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.
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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.
3.14 CLEANUP AND PROTECTION
A. During planting, keep adjacent paving and construction clean and work area in an orderly
condition.
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 before Substantial Completion, remove nursery tags, nursery stakes, tie
tape, labels, wire, burlap, and other debris from plant material, planting areas, and Project site.
3.15 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.
END OF SECTION 329300
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