920 LANDSCAPING MATERIALS

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920.01 SOILS
Topsoil, Subsoil, and Bioretention Soil Mix shall conform to requirements of this section. Soils shall be sampled, tested and approved by the Soils and Aggregates Technology Division of the Office of Materials Technology, or by other approved tests or laboratories. Soils shall be amended as specified by the Nutrient Management Plan (NMP).
920.01.01 Existing Topsoil and Salvaged Topsoil.
(a) Existing Topsoil. Existing topsoil is the surface material of existing landscaped areas on SHA property that will be used for seeding or other landscape construction without excavation or significant grading.
(b) Salvaged Topsoil. Salvaged topsoil is the surface material of existing landscaped areas on SHA property that will be used for seeding or other landscape construction after being excavated, stockpiled, and placed in designated areas.
(c) Composition. Existing topsoil and salvaged topsoil shall conform to the following:
COMPOSITION - EXISTING TOPSOIL & SALVAGED TOPSOIL
TEST

PROPERTY

TEST

METHOD

TEST VALUE AND AMENDMENT
Prohibited

Weeds

Free of live stems or roots of Shattercane, Johnsongrass, Canada Thistle, Bull Thistle, Plumeless Thistle, Musk Thistle, Common Reed and Japanese Knotweed when inspected before transportation.
Debris 1.0 % or less by weight of cement, concrete, asphalt, crushed gravel or construction debris when inspected.
Grading

Analysis

R-58 Sieve Size Passing by Weight

Minimum %

2 in. 100
No. 4 90
No. 10 80
Textural

Analysis

T-88 Particle % Retained by Weight
Size mm Minimum Maximum
Sand 2.0 – 0.050 15 77
Silt 0.050 – 0.002 Combined Silt and Clay

23

80
Clay less than 0.002 30
Soil pH ASTM D4972 pH of 4.8 to 7.6. Apply limestone to Existing Topsoil and Salvaged Topsoil with pH 4.8 to 6.1 per NMP. Apply sulfur to Existing Topsoil and Salvaged Topsoil with pH 7.1 to 7.6 per NMP.
Organic

Matter

T-267 1.0 to 8.0 percent OM by weight. Apply compost to Existing Topsoil and Salvaged Topsoil with 1.0 to 3.7 percent OM per NMP.
Nutrient

Content

Administration will assess. Apply fertilizer per NMP for nitrogen requirement and optimum fertility index values (FIV) for phosphorus and potassium.
Soluble

Salts

EC 1:2

(V:V)

800 ppm (1.25 mm hos/cm) or less. Apply gypsum to Existing Topsoil and Salvaged Topsoil with 500 to 800 ppm (0.78 to 1.25 mhos/cm) per NMP.
Harmful

Materials

Topsoil shall not contain substances in concentrations that are harmful to human health, water quality, or plant growth. Industrial waste such as ash, slag, raw sludge, or similar materials shall not be soil components.
920.01.02 Furnished Topsoil. A natural, friable, surface soil that is uniform in color and texture, and not derived from the project. Producers shall be included in the Qualified Products List maintained by the Administration for Furnished Topsoil.
(a) Composition. Furnished topsoil shall conform to the following.
COMPOSITION - FURNISHED TOPSOIL
TEST

PROPERTY

TEST

METHOD

TEST VALUE AND AMENDMENT
Prohibited

Weeds

Free of live stems and roots of species in 920.01.01 as well as live stems and roots of Bermudagrass, Quackgrass, and Yellow Nutsedge.
Debris 920.01.01
Grading

Analysis

R-58 920.01.01
Textural

Analysis

T-88 Particle % Retained by Weight
Size mm Minimum Maximum
Sand 2.0 – 0.050 20 75
Silt 0.050 – 0.002 Combined Silt and Clay

25

75
Clay less than 0.002 30
Soil pH ASTM D4972 pH 6.1 to pH 7.4
Organic

Matter

T-267 4.0 to 8.0% OM by weight
Nutrient

Content

920.01.01
Soluble

Salts

EC 1:2

(V:V)

500 ppm (0.78 mm hos/cm) or less.
Harmful

Materials

920.01.01
(b) Storage. Furnished topsoil shall be a homogenous mixture stored at a specific, identifiable site in a stockpile constructed as specified in 308.03.20 and 701.03.03(c).
(c) Approval. Tests shall be completed and approval will be granted before furnished topsoil is delivered. Ensure that Form 27B has been completed and that a source of supply letter for the furnished topsoil soil has been submitted and approved.
(d) Delivery. Certification shall be submitted that the furnished topsoil is delivered from an approved stockpile. A bill of lading or other acceptable documentation that identifies the approved source of supply shall be submitted when furnished topsoil is delivered.
920.01.03 Salvaged Subsoil. Salvaged subsoil is the subsurface material of existing areas that will be used for landscape construction after being excavated, stockpiled, and placed in designated areas.
(a) Composition. Salvaged subsoil shall conform to the following:
COMPOSITION - SALVAGED SUBSOIL
TEST

PROPERTY

TEST

METHOD

TEST VALUE AND AMENDMENT
Prohibited

Weeds

920.01.01
Debris 5.0 percent or less by weight of any combination of cement, concrete, asphalt, or other construction debris when inspected.
Grading

Analysis

R-58 Sieve Size Passing by Weight

Minimum %

2 in. 90
No. 4 85
No. 10 60
Textural

Analysis

T-88 Particle % Retained by Weight
Size mm Minimum Maximum
Sand 2.0 – 0.050 10 85
Silt 0.050 – 0.002 10 85
Clay less than 0.002 5 40
Soil pH ASTM D4972 pH of 4.5 to 7.8.
Organic

Matter

T-267 0.1 to 5.0 % by weight.
Soluble

Salts

EC 1:2

(V:V)

1000 ppm (1.56 mm hos/cm) or less.
Harmful

Materials

920.01.01
920.01.04 Furnished Subsoil. A natural subsurface soil that is uniform in texture and not derived from the project. Furnished subsoil shall conform to the following:
(a) Composition. Furnished subsoil shall conform to the following:
COMPOSITION - FURNISHED SUBSOIL
TEST

PROPERTY

TEST

METHOD

TEST VALUE AND AMENDMENT
Prohibited

Weeds

920.01.01
Debris 920.01.03
Grading

Analysis

R-58 920.01.03
Textural

Analysis

T-88 920.01.03
Soil pH ASTM D4972 920.01.03
Organic

Matter

T-267 920.01.03
Soluble

Salts

EC 1:2

(V:V)

800 ppm (1.25 mm hos/cm) or less
Harmful

Materials

920.01.01
(b) Storage. Refer to 920.01.02(b).
(c) Approval. Refer to 920.01.02(c).
(d) Certification and Delivery. Refer to 920.01.02(d).
920.01.05 Bioretention Soil Mix (BSM). BSM shall be a homogenous mixture as follows:
(a) Components. BSM shall be composed of Sand, Furnished Topsoil, and Hardwood Mulch. BSM may include approved soil amendments. No other components shall be used.
(1) Sand. Sand shall be washed silica sand that conforms to ASTM C-33 or ASTM M-6 with less than 1 percent by weight of any combination of diabase, greystone, calcareous, or dolomitic sand.
(2) Furnished Topsoil. Refer to 920.01.02.
(3) Hardwood Mulch. Hardwood Mulch shall be the bark and wood of hardwood trees that is milled and screened to a uniform particle size of 2 in. or less. Hardwood Mulch shall be aged for 6 months or longer, with negligible quantity of sawdust and no foreign materials.
(4) Amendments. Refer to 920.02. Limestone, Sulfur, and Iron Sulfate may be used to adjust pH of BSM. No other amendments shall be used.
(b) Composition. BSM shall conform to the following:
COMPOSITION- BIORETENTION SOIL MIX (BSM)
TEST

PROPERTY

TEST

METHOD

TEST VALUE
Weeds Free of seed and viable plant parts of species in 920.06.02(a)(b)(c) when inspected.
Debris No observable content of cement, concrete, asphalt, crushed gravel or construction debris.
Hardwood Mulch 20 percent of the loose volume of BSM when inspected.
Textural Analysis T-88 Particle % Retained by Weight
Size mm Minimum Maximum
Sand 2.0 – 0.050 79 94
Silt 0.050 – 0.002 4 20 Combined Silt and Clay

21

Clay less than 0.002 1 10
Soil pH ASTM D4972 pH of 5.7 to 7.4.
Organic Matter T-267 Minimum 1.5 percent by weight.
Soluble Salts EC 1:2

(V:V)

500 ppm (0.78 mm hos/cm) or less.
Harmful Materials 920.01.01(a).
(c) Storage. Refer to 920.01.02(b).
(d) Approval. Refer to 920.01.02(c).
(e) Certification and Delivery. Refer to 920.01.02(d).
920.02 SOIL AMENDMENTS
920.02.01 Limestone. Limestone shall be an agricultural product manufactured and labeled for sale in Maryland for increasing soil pH. Limestone shall contain at least 85 percent calcium and magnesium carbonates. Dolomitic limestone shall contain at least 10 percent magnesium as magnesium oxide and 85 percent calcium and magnesium carbonates.
Limestone shall be supplied as a fine powder, or as pellets produced from fine powder, that conforms to the following:
LIMESTONE GRADING ANALYSIS
SIEVE

Size Number

PASSING BY WEIGHT

Minimum %

10 100
20 98
100 50
920.02.02 Sulfur. Sulfur shall be an agricultural product manufactured and labeled for sale in Maryland for reducing soil pH. Sulfur labeled as a fertilizer may also be used to supply sulfur as a plant nutrient. Sulfur shall be supplied as a fine powder or pelletized powder with a minimum purity of 90 percent elemental sulfur.
920.02.03 Iron Sulfate. Iron sulfate shall be an agricultural product manufactured and labeled for sale in Maryland for reducing soil pH. Iron sulfate labeled as a fertilizer may also be used to supply sulfur or iron as a plant nutrient. Iron sulfate shall be supplied as a fine powder or pelletized powder with a minimum purity of 15 percent water soluble iron derived from ferrous sulfate.
920.02.04 Gypsum. Gypsum shall be an agricultural product manufactured and labeled for sale in Maryland as an aid for improving soil structure and removing soil soluble salts, or as a fertilizer to supply calcium and sulfate. Gypsum shall be supplied as a fine powder or pelletized powder with a minimum purity of 68 percent calcium sulfate dihydrate.
920.02.05 Compost. Compost products shall by Type A, Type B, or Type C in conformance with this specification. All compost types shall be biologically mature and no longer able to reheat to thermophilic temperatures per DeWar Self Heating > 5 stable; shall have a moisture content of 30 to 55 percent; shall have a weight of 1400 lb/yd2 or less when delivered.
(a) Type A Compost. Type A Compost shall be composed primarily of biosolids, manure, and similar compost source materials with low Carbon to Nitrogen ratios. Type A Compost shall be used as a soil amendment when specified in a Nutrient Management Plan (NMP).
The typical fertilizer analysis of Type A Compost shall be provided on bagged products offered for sale. The typical fertilizer analysis of bulk Type A Compost products offered for sale by CY or Ton shall be provided to the Administration as a requirement of prequalification, or the analysis may accompany the delivery of bulk compost products.
Type A Compost shall conform to the table below:
COMPOST PHYSICAL PROPERTIES PARTICLE SIZE AND GRADING ANALYSIS

Type A and Type B Compost

Type A and Type B Compost shall have pH of 6.0 to 7.5; shall have soluble salt concentration less than 10.0 mm hos/cm; shall have a moisture content of 30 percent to 55 percent; and shall be screened as follows.
SIEVE PASSING BY VOLUME
SIZE mm
0.5 in. 12.5 100 percent minimum
No. 4 4.75 90 percent maximum
No. 40 0.425 25 percent maximum
No. 200 0.075 2.2 percent maximum
(b) Type B Compost. Type B Compost shall be composed primarily of tree leaves, lawn clippings, and similar compost source materials with high Carbon to Nitrogen ratios. Type B Compost shall be used as a soil amendment when specified in a Nutrient Management Plan (NMP).
The typical fertilizer analysis of Type B Compost shall be provided on bagged products offered for sale. The typical fertilizer analysis of bulk Type B Compost products offered for sale by CY or Ton shall be provided to the Administration as a requirement of prequalification, or the analysis may accompany the delivery of bulk compost products.
Type B Compost shall conform to the table in 920.02.05(a) above.
(c) Type C Compost. Type C Compost shall be composed primarily of chipped, ground or granulated wood, bark, and similar compost source materials with very high Carbon to Nitrogen ratios. Type C Compost shall be used to construct compost socks, compost logs, compost berms and other manufactured products for sediment and erosion control.
Type C Compost shall conform to the table, below:
COMPOST PHYSICAL PROPERTIES PARTICLE SIZE AND GRADING ANALYSIS

Type C Compost

Type C Compost shall have pH of 5.0 to 8.0; shall have soluble salt concentration less than 4.0 mm hos/cm; shall have a moisture content of 30 percent to 55 percent; and shall be screened as follows.
SIEVE SIZE PASSING BY VOLUME
6 in. 100 percent minimum
3/4 in. 75 percent minimum
920.02.06 Peat Moss. A milled sphagnum peat moss with negligible woody substances.
920.02.07 Aged Pine Bark Fines. Derived from the bark of pine trees that have been composted and milled to a fineness approved for use by the Landscape Programs Division.
920.02.08 Water Absorbent Gel. A cross linked polyacrylamide agricultural product used to maintain moisture around bare root plants and as a soil conditioner. Formulas used shall conform to the manufacturer's recommendations.
920.03 FERTILIZERS
920.03.01 Composition. Standard Fertilizers and Special Fertilizers shall be commercial grade products labeled for sale and use as agricultural fertilizer, and shall conform to Federal and Maryland State regulations and the Standards of the Association of Official Analytical Chemists. All analyses are subject to approval by the Landscape Programs Division prior to application.
(a) Standard Fertilizer. Standard fertilizers shall be produced of ingredients, analysis, and composition as follows:
(1) Ingredients. Standard fertilizers shall include one or more of the following:
FERTILIZER INGREDIENTS

Abbreviation and Chemical Name of Ingredient

ammonium nitrate polymer coated urea
ammonium sulfate potassium chloride
biosolids potassium nitrate
calcium nitrate SOP potassium sulfate
DAP diammonium phosphate SCU sulfur coated urea
isobutylidene diurea triple super phosphate
methylene urea urea
MAP monoammonium phosphate UF ureaform
(2) Analysis and Composition. Standard fertilizers shall contain nitrogen (N), phosphorus (P), potassium (K), and sulfate (SO4) derived from ingredients above.
STANDARD FERTILIZER ANALYSIS AND COMPOSITION
FERTILIZER USE
0-0-50 SOPa Source of potassium (K) and sulfate (SO4) fertilizer. Used alone or in fertilizer mixtures for turfgrass and other groundcover establishment.
11-52-0 MAPa Source of nitrogen (N) and phosphorus (P) fertilizer. Used alone or in fertilizer mixtures for turfgrass and other groundcover establishment.
20-16-12 (83 percent UF with MAP & SOP)b Source of slow-release nitrogen (N), phosphorus (P), potassium (K) and sulfate (SO4). Fertilizer mixture used for turfgrass and other groundcover establishment.
38-0-0 UFa Source of slow-release nitrogen (N) fertilizer. Used in fertilizer mixtures for turfgrass and other groundcover establishment.
37-0-0 SCU Source of slow-release nitrogen (N) and sulfate (SO4). Fertilizer used for Temporary Seed and Refertilizing for groundcover establishment.
Note:

aPurity shall be at least 98 percent UF, MAP, or SOP as indicated.

bMixture of UF, MAP, and SOP with no more than 2 percent of any combination of other materials.

(b) Special Fertilizers. Special fertilizers shall be of ingredients, analysis, and composition as follows:
(1) Ingredients. Special fertilizers shall provide label analysis guaranteeing nitrogen, phosphorus, and potassium from ingredients in 920.03.01(a) and also include plant micronutrients, coatings, or materials to augment their performance.
(2) Analysis and Composition. As follows:
STANDARD FERTILIZER ANALYSIS AND COMPOSITION
FERTILIZERa USE
14-14-14

Polymer-coated fertilizer with minor nutrients

Slow-release fertilizer used to install trees, shrubs, perennials and other plant materials.
14-14-14

Granular fertilizer with minor nutrients

Slow-release fertilizer used to install trees, shrubs, perennials and other plant materials.
20-10-5

21 to 23 grams per fertilizer tablet. 13 percent water insoluble and 7 percent water soluble N, with minor nutrients

Slow release fertilizer tablet used to install trees, shrubs, perennials and other plant materials.
20-20-20

Water soluble powder fertilizer with minor nutrients

Fertilizer solution used to refertilize trees, shrubs, perennials and other plant materials.
Note:

aShall be a mixture of any ingredients listed in 920.03.01(a)(1) and (b)(1) with no more than 5 pecent by weight of any combination of other materials.

920.04 MULCHES
Materials used as mulch shall have a uniform texture and be free from foreign materials or concentrations of metals, chemicals, or other substances that are harmful to human health, water quality, or plant growth.
920.04.01 Straw Mulch. Shall consist of thoroughly threshed stems and leaves of barley, oats, rye, and wheat. Straw mulch shall be in an air dry condition suitable for application with a mulch blower or other equipment. Straw mulch shall be visually inspected to ensure it is free of objectionable quantities of mold, foreign substances, and weed seeds.
920.04.02 Wood Cellulose Fiber Mulch. A uniformly processed wood product that is able to form a homogenous slurry with seed, fertilizer, and other materials under agitation with water.
The fiber shall perform satisfactorily in hydraulic seeding equipment without clogging or damaging the system. The slurry shall contain a green dye to provide easy visual inspection for uniformity of application.
The manufacturer shall furnish certification as specified in TC-1.03 of the Technical Association of Pulp and Paper Industry (TAPPI) in conformance with the following:
WOOD CELLULOSE FIBER
TEST PROPERTY TEST VALUE
Particle Length Approx. 0.5 in.
Particle Thickness Approx. 0.063 in.
Net Dry Weight Content Minimum as stated on bag
pH, TAPPI Standard T 509 4.0 – 8.5
Ash Content, TAPPI Standard T 413 7.0 percent maximum
Water Holding Capacity 90 percent minimum
The material shall be delivered in packages of uniform weight, which shall not exceed 75 lb net weight and shall bear the name of the manufacturer, the net weight, and a supplemental statement of the net weight content.
920.04.03 Shredded Hardwood Bark (SHB) Mulch. Shall consist of natural bark derived from hardwood trees that has been milled and screened to a maximum 4 in. particle size. SHB mulch shall contain negligible quantities of sawdust or other non-bark woody materials.
920.04.04 Composted Wood Chip (CWC) Mulch. Shall consist of natural wood mechanically reduced to a maximum size of 2 in. x 2 in. x 0.5 in. by a chipping machine before being composted. Grading analysis of CWC mulch shall be as follows:
COMPOSTED WOOD CHIP MULCH
SIEVE SIZE

in.

PASSING BY VOLUME

Maximum %

2 100
1 30
0.5 10
920.05 SOIL STABILIZATION MATTING
920.05.01 Soil Stabilization Matting (SSM). SSM products shall be selected from the Office of Materials Technology’s Qualified Products List (QPL) for Soil Stabilization Matting Manufacturers.
SSM shall consist of machine-produced matting of uniform thickness, weave, or distribution of fibers, supplied in rolls at least 40 in. wide. SSM shall be smolder resistant.
The chemical components shall be nonleaching, nontoxic to vegetation and germinating seed, and noinjurious to the skin.
(a) Type A. Degradable; excelsior or nonwoven coconut fibers with biodegradable netting on top and bottom; netting shall be cotton, cotton blend or coir. Type A soil stabilization matting products shall be listed in the current AASHTO National Transportation Product Evaluation Program (NTPEP) Report for Erosion Control Products. Large scale results shall be obtained by a Geosynthetic Institute Accredited or other approved laboratory for Criteria marked *.
COMPOSITION - TYPE A SSM
CRITERIA METHOD MEASUREMENT
Thickness D6525 At least 0.25 in.
Weight D6475 At least 7.9 oz/yd2
Tensile Strength – MD D6818 At least 6.25 lb/in.
Tensile Strength – TD D6818 At least 4.7 lb/in.
Light Penetration D6567 At least 5 percent
Slope Erosion – C Factor* D6459 No more than 0.2
Shear for 0.5 in Soil Loss* D6460 At least 1.75 lb/ft2
Netting Opening No more than 2.0 x 1.0 in.
Thread Biodegradable
Stitching and Spacing No more than 4.0 in. apart
(b) Type B. Permanent; non-woven, nondegradable, UV stabilized, synthetic fibers; with non-degradable, UV stabilized, synthetic netting on top and bottom. Type B soil stabilization matting products shall be listed in the current AASHTO National Transportation Product Evaluation Program (NTPEP) Report for Erosion Control Products. Large scale results shall be obtained by a Geosynthetic Institute Accredited or other approved laboratory for Criteria marked *.
COMPOSITION - TYPE B SSM
CRITERIA METHOD MEASUREMENT
Thickness D6525 At least 0.3 in.
Weight D6655 At least 10.0 oz/yd2
Tensile Strength – MD D6818 At least 12.5 lb/in.
Tensile Strength – TD D6818 At least 12.5 lb/in.
Tensile Strength > 500 hr. exp D4355 At least 80 percent of original
Light Penetration D6567 At least 10 percent
Slope Erosion – C Factor* D6459 No more than 0.2
Shear for 0.5 in Soil Loss* D6460 At least 2.25 lb/ft2
Netting Opening No more than 1.0 x 0.75 in.
Thread Nondegradable, UV stabilized, synthetic
Stitching and Spacing No more than 4.0 in. apart
(c) Type C. Permanent; nondegradable, synthetic lattice; and easily filled with soil.
COMPOSITION - TYPE C SSM
CRITERIA METHOD MEASUREMENT
Thickness D6525 At least 0.4 in.
Weight D6655 At least 7.0 oz/yd2
Tensile Strength – MD D6818 At least 12.5 lb/in.
Tensile Strength – TD D6818 At least 9.5 lb/in.
Tensile Strength > 500 hr. exp. D4355 At least 80 percent of original
Porosity or Open Area At least 80 percent
(d) Type D Degradable; woven coir.
COMPOSITION - TYPE D SSM
CRITERIA METHOD MEASUREMENT
Thickness D6525 At least 0.30 in.
Weight D6475 At least 19.0 oz/yd2
Porosity or Open Area At least 35 percent
(e) Type E. Degradable; excelsior, straw, or straw/coconut blend fibers; biodegradable netting on top and bottom; netting shall be cotton, cotton blend or coir. Type E soil stabilization matting products shall be listed in the current AASHTO National Transportation Product Evaluation Program (NTPEP) Report for Erosion Control Products. Large scale results shall be obtained by a Geosynthetic Institute Accredited or other approved laboratory for Criteria marked *.
COMPOSITION - TYPE E SSM
CRITERIA METHOD MEASUREMENT
Thickness D6525 At least 0.25 in.
Weight D \6475 Excelsior: 6.0 to 7.9 oz/yd2
Straw; Straw & Coconut: At least 6.0 oz/yd2
Tensile Strength – MD D6818 At least 6.25 lb/in.
Tensile Strength – TD D6818 At least 2.5 lb/in.
Light Penetration D6567 At least 5 percent
Slope Erosion – C Factor* D6459 No more than 0.2
Shear for 0.5 in Soil Loss* D6460 At least 1.5 lb/ft2
Netting Opening Excelsior: 2.0 in. x 1.0 in. or less
Straw; Straw & Coconut: 0.75 in. x 0.75 in. or less
Thread Biodegradable
Stitching and Spacing Excelsior: 4.0 in. apart or less
Straw, or Straw & Coconut: 2.0 in. apart or less
920.05.02 Fasteners for Soil Stabilization Matting and Turfgrass Sod. Fasteners shall be selected as specified in Section 709.03.06 and conform to the following:
(a) Wood Peg. Wood, biodegradable, untreated; single leg is driven into the soil so that wider top is flush with turfgrass sod and SSM.
6 Inch. Approx. 6 in. long, 3/8 in. thick; top 1 in. wide, tapered to base.
(b) T-Head Pin. Molded plastic; biodegradable. Single leg with barbs is driven into the soil so that molded T-Head top is flush with turfgrass sod and SSM.
6 Inch. Approx. 6 in. long, 3/8 in. thick; head 1 in. wide.
8 Inch. Approx. 8 in. long, 3/8 in. thick; head 1 in. wide.
(c) Circle-Top Pin. Steel wire; single leg is driven into the soil so that coil or loop top is flush with turfgrass sod and SSM.
6 Inch. 11 gauge; leg 6 in. long.
8 Inch. 11 gauge; leg 8 in. long.
(d) Round-Head Pin. Molded plastic; biodegradable. Single leg with barbs is driven into the soil so that molded disk top is flush with turfgrass sod and SSM.
6 Inch. Approx. 6 in long; head 1 in. diameter.
8 Inch. Approx. 8 in long; head 1 in. diameter.
(e) U-Shape Staple. Steel wire; two main legs are driven into the soil so that top of staple is flush with turfgrass sod and SSM.
6 Inch. 11 gauge bent into U shape; legs 6 in. long; top 1 in. to 1-1/2 in. wide.
8 Inch. 8 gauge bent into U shape; legs 8 in. long; top 1 in. to 1-1/2 in. wide.
12 Inch. 8 gauge bent into U shape; legs 12 in. long; top 1 in. to 1-1/2 in. wide.
(f) Fabric Pin. Steel nail; single leg is driven into the soil so that steel washer top is flush with SSM.
12 Inch. 11 gauge approx. 12 in. long.
18 Inch. 3/16 in. approx 18 in. long.
920.06 SEED AND TURFGRASS SOD STANDARDS
920.06.01 Names and Naming. The authority for common and scientific names shall be the USDA NRCS The Plants Database website at plants.usda.gov. Cultivar names shall be those of the registered cultivar.
Plant and seed identification, tags, and labels shall correspond to the common name and scientific name of the species in The Plants Database. Any conflict in names or naming shall be resolved by the Engineer in consultation with the Landscape Programs Division.
920.06.02 Prohibited Weeds.
(a) Weeds Prohibited in Turfgrass Sod and SHA Seed Mixtures. Turfgrass Sod, SHA Turfgrass Seed Mix, SHA Temporary Seed Mix, and Additive Seed shall be free from seed or viable parts of the following species:
WEEDS PROHIBITED

IN TURFGRASS SOD & SHA SEED MIXTURES

COMMON NAME SCIENTIFIC NAME
Annual Bluegrass Poa annua L.
Balloonvine Cardiospermum halicacabum L.
Bermudagrass Cynodon dactylon (L.) Pers. (approved for Bermudagrass sod)
Canada Thistle Cirsium arvense (L.) Scop.
Carolina Horsenettle Solanum carolinense L.
Common Corncockle Agrostemma githago L.
Common Reed = Phragmites Phragmites australis (Cav.) Trin. ex Steud.
Crested Anoda = Spurred Anoda Anoda cristata (L.) Schltdl.
Dodder Cuscuta spp. L.
Field Bindweed Convolvulus arvensis L.
Japanese Bristlegrass = Giant Foxtail Setaria faberi Herrm.
Java-Bean = Sicklepod Senna obtusifolia (L.) Irwin and Barneby
Johnsongrass Sorghum halepense (L.) Pers. and hybrids
Meadow Garlic = Wild Onion Allium canadense L.
Plumeless Thistle, Musk Thistle Carduus L.
Quackgrass Elymus repens (L.) Gould
Rough Cocklebur Xanthium strumarium L.
Serrated Tussock Nassella trichotoma (Nees) Hack
Wild Garlic Allium vineale L.
Yellow Nutsedge Cyperus esculentus L.
(b) Weeds Prohibited in Meadow and Wildflower Seed. Meadow and Wildflower Seed shall be free of species listed in (a) and the following species:
WEEDS PROHIBITED

IN MEADOW & WILDFLOWER SEED

COMMON NAME SCIENTIFIC NAME
Asiatic Tearthumb = Mile-a-Minute Polygonum perfoliatum L.
Burdock and related species Arctium L.
Canarygrass = Reed Canarygrass and related spp. Phalaris L.
Common Wormwood = Mugwort Artemisia vulgaris L.
Dogbane and related spp. Apocynum L.
Eastern Poison Ivy Toxicodendron radicans (L.) Kuntze
Fig Buttercup = Lesser Celandine Ranunculus ficaria L. var. bulbifera Marsden-Jones
Garlic Mustard Alliaria petiolata (M. Bieb.) Cavara and Grande
Giant Hogweed Heracleum mantegazzianum Sommier and Levier
Japanese Honeysuckle, Tatarian Honeysuckle, related spp. Lonicera L.
Japanese Knotweed Polygonum cuspidatum Siebold and Zucc.
Lesser Knapweed = Spotted Knapweed Centaurea nigra L.
Multiflora Rose Rosa multiflora Thunb.
Nepalese Browntop = Japanese Stiltgrass Microstegium vimineum (Trin.) A. Camus
Poison Hemlock Conium maculatum L.
Purple Loosestrife and related spp. Lythrum L.
Silvergrass and related spp. Miscanthus Andersson
Thistle and related spp. Cirsium Mill., Onopordum L.
(c) Weeds Prohibited in Shrub Seed. Shrub Seed shall be free of species listed in (a) and (b) and the following species:
WEEDS PROHIBITED

IN SHRUB SEED

COMMON NAME SCIENTIFIC NAME
Burningbush Euonymus alatus (Thunb.) Siebold
Common Buckthorn Rhamnus cathartica L.
Japanese Barberry Berberis thunbergii DC.
Oriental Bittersweet Celastrus orbiculatus Thunb.
Oleaster; Russian Olive, Autumn Olive, and related spp. Elaeagnus L.
Privet, and related species Ligustrum L.
Tree of Heaven Ailanthus altissima (Mill.) Swingle
920.06.03 Turfgrass Sod. Turfgrass sod shall be Maryland Certified Tall Fescue Sod unless Bermudagrass Sod or Zoysiagrass Sod is specified.
Sod shall be field grown in the State of Maryland in compliance with the Maryland Turfgrass Law and Regulations of the State of Maryland. Each load of tall fescue sod shall bear a Maryland State Certified Label.
Sod shall be sufficiently knitted when harvested to resist breakage under normal handling and be in good health at the time of delivery. Sod shall be machine cut in strips at least 14 in. wide. Tall Fescue Sod shall be uniform thickness of 0.75 in. to 1.25 in., excluding top growth, with thatch thickness less than 3/8 in.
Prior to harvest, Tall Fescue Sod shall be mowed to a height of 2.0 in. to 3.5 in. Bermudagrass Sod and Zosiagrass Sod shall be mowed to a height of 0.75 in. to 3.0 in.
920.06.04 Approved Cultivars. Refer to ‘University of Maryland Turfgrass Technical Update TT-77 Recommended Turfgrass Cultivars for Certified Sod Production and Seed Mixtures in Maryland’. Only cultivars included in TT-77 may be used. When no cultivar is specified, any common type cultivar of the species may be used.
920.06.05 Seed Testing and Sampling. Seed shall comply with the Maryland Seed Law and Regulations of the State of Maryland. Seed suppliers shall assume charges for seed inspections and testing.
(a) Certified Seed. Component cultivars of SHA Turfgrass Seed Mix, SHA Special Purpose Seed Mix, SHA Temporary Seed Mix, and any seed used as additives for these mixes, shall be certified and carry the tags of their state of origin that show the percent purity, percent germination, percent weed seed, and types and content of noxious weed seed.
(b) SHA Seed Mixtures. Turfgrass Seed Mix, SHA Special Purpose Seed Mix, and SHA Temporary Seed Mix shall be sampled and tested by an inspector of the Maryland Department of Agriculture, Turf and Seed Section (MDA) for percent purity, percent germination, percent weed seed, and types and content of noxious weed seed. These seed mixtures shall conform to MDA Standards for Maryland Certified Seed and carry the certified tag of the State of Maryland.
(c) Unmixed Seed. Seed supplied for use as Meadow Seed, Wildflower Seed, and Shrub Seed shall be supplied in containers of a single species, unmixed. Each species shall be tested by the producer or supplier and carry a tag that shows the percent purity, percent germination, percent weed seed; and types and content of noxious weed seed.
920.06.06 Standards for Seed Species. Seed supplied in lots of individual species or used to produce mixes shall conform to the requirements of this section for minimum percent germination, minimum purity, and maximum percent of weed seed.
Meadow seed, wildflower seed, and shrub seed that does not conform to these standards may be used after review and approval by the Engineer in consultation with the Landscape Programs Division. The seed will be subject to use at increased seeding rates or measures to compensate for substandard seed purity, germination, or weed content.
(a) SHA Turfgrass Seed Mix and SHA Special Purpose Seed Mix. Species included in SHA Turfgrass Seed Mix and SHA Special Purpose Seed Mix shall be MDA Certified Seed of approved cultivars and conform to the following requirements for minimum percent purity, maximum percent weed seed, and minimum percent germination:
TURFGRASS SEED SPECIES
COMMON NAME,

and SCIENTIFIC NAME

PURITY

Min %

WEED

Max %

GERM

Min %

Chewings Fescue

Festuca rubra L. ssp. fallax (Thuill.) Nyman

98 0.5 85
Red Fescue

Festuca rubra L. ssp. rubra

98 0.5 85
Hard Fescue

Festuca brevipila Tracey

98 0.5 85
Kentucky Bluegrass

Poa pratensis L. ssp. pratensis

95 0.4 80
Sheep Fescue

Festuca ovina L.

98 0.5 85
Tall Fescue

Schedonorus arundinaceus (Schreb.) Dumort., nom. cons.

98 0.5 85
(b) Temporary and Grass Additive Seed. Species included in SHA Temporary Seed Mix, or used as Additive Seed with SHA Turfgrass Seed Mix or SHA Special Purpose Seed Mix shall conform to the following requirements for minimum percent purity, maximum percent weed seed, and minimum percent germination:
TEMPORARY AND GRASS ADDITIVE SEED SPECIES
COMMON NAME,

and SCIENTIFIC NAME

PURITY

Min %

WEED

Max %

GERM

Min %

Cereal Rye

Secale cereale L.

98 0.1 85
Common Barley, winter type

Hordeum vulgare L.

98 0.3 85
Common Oat, winter type

Avena sativa L.

98 0.5 85
Common Wheat, winter type

Triticum aestivum L.

98 0.1 85
Foxtail Millet

Setaria italica (L.) P. Beauv.

99 0.1 80
Perennial Ryegrass

Lolium perenne L. ssp. perenne

97 0.5 85
Weeping Alkaligrass

Puccinellia distans (Jacq.) Parl.

97 0.5 85
(c) Meadow Forb Seed. Seed shall be supplied in lots of individual species, unmixed, labeled with common name and scientific name in conformance with the following:
(1) Purity. Weed and/or other crop seed content shall be 2.5 percent or less by weight. Seed that does not conform to this specification may be used after approval by the Engineer in consultation with the Landscape Programs Division at increased seeding rates, or with measures to compensate for increased weed or crop seed content.
(2) Origin. Except as noted with asterisk*, Seed shall either be collected from native sources in USDA Hardiness Zone 5b, 6a, 6b and 7a in the States of Maryland, Pennsylvania, New York, New Jersey, Delaware, Virginia, West Virginia, or North Carolina, or shall be grown and produced from seed certified to have been collected from sites in the USDA Hardiness Zones of those States.
Seed that does not conform to origin requirements may be used after review and approval by the Engineer in consultation with the Landscape Programs Division.
(3) Species. Seed shall conform to the following species, subspecies and varieties:
MEADOW FORB SEED SPECIES
COMMON NAME SCIENTIFIC NAME
Allegheny Monkeyflower = Square Stem Monkeyflower Mimulus ringens L. var. ringens
Birds-Foot Trefoil * Lotus corniculatus L.
Bearded Beggarticks = Showy Tickseed Bidens aristosa (Michx.) Britton
Blackeyed Susan Rudbeckia hirta L. var. hirta

Rudbeckia hirta L. var. pulcherrima Farw.

Blanket Flower Gaillardia aristata Pursh
Browneyed Susan Rudbeckia triloba L. var. triloba

Rudbeckia triloba L. var. pinnatiloba Torr. and A. Gray

Common Boneset Eupatorium perfoliatum L. var. perfoliatum
Common Evening Primrose Oenothera biennis L.
Common Yarrow * Achillea millefolium L.
Crimsoneyed Rose Mallow Hibiscus moscheutos L.
Eastern Purple Coneflower Echinacea purpurea (L.) Moench
Flat-top Goldentop = Grass-Leaved Goldenrod Euthamia graminifolia (L.) Nutt.

Euthamia graminifolia (L.) Nutt. var. graminifolia Euthamia graminifolia (L.) Nutt. var. hirtipes (Fernald) C.E.S. Taylor and R.J. Taylor

Gray Goldenrod Solidago nemoralis Aiton var. nemoralis
King of the Meadow = Tall Meadow Rue Thalictrum pubescens Pursh
Lanceleaf Tickseed = Lanceleaf Coreopsis Coreopsis lanceolata L.
Maryland Senna Senna marilandica (L.) Link
Maximilian Sunflower Helianthus maximiliani Schrad.
New England Aster Symphyotrichum novae-angliae (L.) G.L. Nesom
New York Aster Symphyotrichum novi-belgii (L.) G.L. Nesom var.

elodes (Torr. and A. Gray) G.L. Nesom Symphyotrichum novi-belgii (L.) G.L. Nesom var. novi-belgii Symphyotrichum novi-belgii (L.) G.L. Nesom var. villicaule (A. Gray) J. Labrecque and L. Brouillet

New York Ironweed Vernonia noveboracensis (L.) Michx.
Partridge Pea Chamaecrista fasciculata (Michx.) Greene

Chamaecrista fasciculata (Michx.) Greene var. fasciculata Chamaecrista fasciculata (Michx.) Greene var. macrosperma (Fernald) C.F. Reed

Red Clover Trifolium pratense L.
Seedbox Ludwigia alternifolia L.
Smooth Blue Aster Symphyotrichum laeve (L.) A. Löve and D. Löve var. laeve

Symphyotrichum laeve (L.) A. Löve and D. Löve var. concinnum (Willd.) G.L. Nesom

Smooth Oxeye = Ox-eye Sunflower Heliopsis helianthoides (L.) Sweet var. helianthoides

Heliopsis helianthoides (L.) Sweet var. scabra (Dunal) Fernald

Spotted Trumpetweed = Spotted Joe Pye Weed Eupatoriadelphus maculatus (L.) King and H. Rob. var. maculatus
Stiff Goldenrod Oligoneuron rigidum (L.) Small var. rigidum
Sundial Lupine = Wild Blue Lupine Lupinus perennis L. ssp. perennis

Lupinus perennis L. ssp. perennis var. perennis Lupinus perennis L. ssp. perennis var. occidentalis S. Watson

Swamp Milkweed Asclepias incarnata L.

Asclepias incarnata L. ssp. incarnata Asclepias incarnata L. ssp. pulchra (Ehrh. ex Willd.) Woodson

Swamp Sunflower = Narrow-Leaved Sunflower Helianthus angustifolius L.
Swamp Verbena = Blue Vervain Verbena hastata L. var. hastata
Talus Slope Penstemon = Tall White Beardtongue Penstemon digitalis Nutt. ex Sims
Joe Pye Weed = Trumpetweed Eutrochium maculatum (L.) E.E. Lamont var. maculatum
White Clover * Trifolium repens L.
Wild Bergamot Monarda fistulosa L. ssp. fistulosa

Monarda fistulosa L. ssp. fistulosa var. mollis (L.) Benth. Monarda fistulosa L. ssp. fistulosa var. rubra A. Gray Monarda fistulosa L. ssp. brevis (Fosberg and Artz) Scora, ined.

(d) Meadow Grass, Sedge, and Rush Seed. Seed shall be supplied in lots of individual species, unmixed, labeled with common name, scientific name, and cultivar in conformance with the following:
(1) Purity. Refer to 920.06.06(c)(1). Grasses with awns shall be debearded or deawned.
(2) Origin. Refer to 920.06.06(c)(2). Cultivars may be produced in any state east of the Mississippi River.
(3) Species. Seed shall conform to the following species, subspecies, varieties, and cultivars:
MEADOW GRASS, SEDGE AND RUSH SEED SPECIES
COMMON NAME and CULTIVARS SCIENTIFIC NAME
Big Bluestem cv. Niagara Andropogon gerardii Vitman
Broomsedge Bluestem = Broomsedge Andropogon virginicus L.

Andropogon virginicus L. var. virginicus

Andropogon virginicus L. var. decipiens C.S. Campbell

Common Rush = Soft Rush = Lamp Rush Juncus effusus L. var. conglomeratus (L.) Engelm.

Juncus effusus L. var. decipiens Buchenau

Juncus effusus L. var. pylaei (Laharpe) Fernald and Wiegand

Juncus effusus L. var. solutus Fernald and Wiegand

Deertongue cv. ‘Tioga’ Dichanthelium clandestinum (L.) Gould
Fowl Bluegrass Poa palustris L.
Fox Sedge Carex vulpinoidea Michx. var. vulpinoidea
Gamagrass cv. ‘Meadowcrest’, ‘Pete’ Tripsacum dactyloides (L.) L.
Indiangrass cv. ‘Rumsey’ Sorghastrum nutans (L.) Nash
Little Bluestem cv. ‘Aldous’ Schizachyrium scoparium (Michx.) Nash var. scoparium

Schizachyrium scoparium (Michx.) Nash var. divergens (Hack.) Gould

Longhair Sedge = Bristly Sedge Carex comosa Boott
Rattlesnake Mannagrass Glyceria canadensis (Michx.) Trin.
Shallow Sedge = Lurid Sedge Carex lurida Wahlenb.
Switchgrass cv. ‘Blackwell’, ‘Shelter’ Panicum virgatum L. var. virgatum

Panicum virgatum L. var. spissum Linder

Virginia Wildrye Elymus virginicus L., Elymus virginicus L. var. halophilus (E.P. Bicknell) Wiegand
Woolgrass Scirpus cyperinus (L.) Kunth
(e) Wildflower Seed. Seed shall be supplied in lots of individual species, unmixed, labeled with common name, scientific name, and cultivar in conformance with the following:
(1) Purity. Species shall be 98 percent purity or greater, with 75 percent germination or greater, and with weed and/or other crop seed content of 2.5 percent or less by weight. Seed that does not conform to purity requirements may be used after approval by the Engineer in consultation with the Landscape Programs Division at increased seeding rates, or with measures to compensate for increased weed or crop seed content.
(2) Origin. Any State of the United States.
(3) Species. Seed shall conform to the following species, subspecies, varieties, and cultivars:
WILDFLOWER SEED SPECIES
COMMON NAME and CULTIVARS SCIENTIFIC NAME
Blackeyed Susan Rudbeckia hirta L. var. hirta

Rudbeckia hirta L. var. pulcherrima Farw.

Calendula Calendula officinalis L.
Common Sunflower cv. ‘Autumn Beauty’ Helianthus annuus L.
Corn Poppy, cv. ‘Shirley Mix’ Papaver rhoeas L.
Doubtful Knight’s-spur = Rocket Larkspur Consolida ajacis (L.) Schur
Firewheel = Annual Gaillardia Gaillardia pulchella Foug.

Gaillardia pulchella Foug. var. pulchella

Garden Cornflower = Bachelors Button Centaurea cyanus L.
Garden Cosmos = Pink Cosmos, cv. ‘Sensation’ Cosmos bipinnatus Cav.
Golden Tickseed Coreopsis tinctoria Nutt.
Lemon Beebalm Monarda citriodora Cerv. ex Lag.
Moroccan Toadflax = Spurred Snapdragon Linaria maroccana Hook. f.
Siberian Wallflower Erysimum ×marshallii (Henfr.) Bois
Sulphur Cosmos = Yellow Cosmos, cv. ‘Bright Lights’ Cosmos sulphureus Cav.
(f) Shrub Seed. Seed shall be supplied in lots of individual species, unmixed, labeled with common name and scientific name in conformance with the following:
(1) Purity. Weed and/or other crop seed content shall be 0.5 percent or less by weight. Minimum purity and minimum germination shall conform to the requirements of (3), below.
(2) Origin. Refer to 920.06.06(c)(2).
(3) Species. Seed shall conform to the following species, subspecies, and varieties:
SHRUB SEED SPECIES
SPECIES

Including Subspecies and Variety

PURITY

Min %

GERM

Min %

American Black Elderberry

Sambucus nigra L. ssp. canadensis (L.) R. Bolli

98 60
American Cranberrybush

Viburnum opulus L. var. americanum Aiton

99 70
Black Chokeberry

Photinia melanocarpa (Michx.) K.R. Robertson and Phipps

99 70
Bristly Locust

Robinia hispida L. var. fertilis (Ashe) R.T. Clausen

Robinia hispida L. var. hispida

99 90
Chokecherry

Prunus virginiana L. var. viginiana

99 70
Common Buttonbush

Cephalanthus occidentalis

98 60
Common Ninebark

Physocarpus opulifolius (L.) Maxim., orth. cons.

99 75
Common Winterberry

Ilex verticillata (L.) A. Gray

99 60
Desert False Indigo

Amorpha fruticosa L.

98 70
Fragrant Sumac

Rhus aromatica var. aromatica

99 85
Gray Dogwood

Cornus racemosa Lam.

99 70
Inkberry

Ilex glabra (L.) A. Gray

98 60
Mapleleaf Viburnum

Viburnum acerifolium L.

99 70
Maryland Senna

Senna marilandica (L.) Link

99 70
Nannyberry

Viburnum lentago L.

99 75
Red Chokeberry

Photinia pyrifolia (Lam.) K.R. Robertson and Phipps

85 60
Red Elderberry

Sambucus racemosa L. var. racemosa

95 70
Redosier Dogwood

Cornus sericea L. ssp. sericea

99 70
Silky Dogwood

Cornus amomum Mill.

98 70
Smooth Sumac

Rhus glabra L.

99 80
Southern Arrowwood

Viburnum dentatum L. var. dentatum

Viburnum dentatum L. var. venosum (Britton) Gleason

Viburnum recognitum Fernald

99 70
Spicebush

Lindera benzoin (L.) Blume var. benzoin

95 60
Staghorn Sumac

Rhus typhina L.

99 85
Steeplebush

Spiraea tomentosa L.

85 70
Swamp Rose

Rosa palustris Marsh.

99 65
Witch Hazel

Hamamelis virginiana L.

99 70
920.06.07 Seed Mixes. Refer to 920.06.01 thru .06 and the document ‘Specifications for Seed and Seed Mixes’ maintained by the Landscape Programs Division, which includes lists of approved cultivars.
(a) SHA Turfgrass Seed Mix.
SHA TURFGRASS SEED MIX
MIX

%

SPECIES
Common Name Scientific Name
95 Tall Fescue Schedonorus arundinaceus (Schreb.) Dumort., nom. cons.
5 Kentucky Bluegrass Poa pratensis L. ssp. pratensis
(b) SHA Special Purpose Seed Mix.
SHA SPECIAL PURPOSE SEED MIX
MIX

%

SPECIES
Common Name Scientific Name
75 Hard Fescue Festuca brevipila Tracey
25 Chewings Fescue Festuca rubra L. ssp. fallax (Thuill.) Nyman
Note: When pre-mixed SHA Special Purpose Seed Mix is not available, a small quantity exception will allow the mix to be performed at the seeding location using Certified seed of the required species.
(c) SHA Temporary Seed Mix.
SHA TEMPORARY SEED MIX
MIX % SPECIES
Common Name Scientific Name
95 One or more of the following:

Common Wheat, winter type

Common Barley, winter type

Common Oat, winter type

Cereal Rye, winter type

        

Triticum aestivum L.

Hordeum vulgare L.

Avena sativa L.

Secale cereale L.

5 Foxtail Millet Setaria italica (L.) P. Beauv.
920.07 PLANT MATERIALS
920.07.01 Certificate and Licenses. Sellers, distributors, installers or producers of nursery stock shall possess the Plant Dealer License, Plant Broker License, or Nursery Inspection Certificate of the Maryland Department of Agriculture, or substitute a similar certificate or licenses from another State where they do business.
920.07.02 Plant Material Inspection. Refer to 920.06.01 regarding common and scientific names of plants. Plant material will be inspected for conformance with 920.07.03 thru .05, and tagged with Administration Plant Material Inspection Seals (Seals) as follows:
(a) Inspection. The Plant Material Inspection will be conducted in Maryland at the nursery where the plant material is grown, or at the brokerage where the plant material is sold. When plant material is produced by a nursery outside Maryland, the Inspection will be conducted at the Contractor’s holding area, or at the project site before planting, unless otherwise specified in the Contract Documents.
The Contractor shall ensure that the plant material is present for inspection on the scheduled date, and that it meets the requirements of 920.07. The condition and identity of plant material will be subject to re-inspection for the duration of the Contract.
(b) Scheduling. The Inspection will be scheduled by the Engineer in consultation with the Landscape Programs Division. At least 14 days notice to schedule an Inspection within Maryland, and at least 45 days notice to schedule an Inspection outside Maryland.
(c) Seals. The Administration will determine which plants, if any, will be tagged with Seals. When Seals are placed upon representative plants within a block of plant material, the plant material delivered for installation shall be similar in size, shape and character to the plant material that received Seals. Plant material that is delivered with broken or missing Seals, or that is not similar to the plant material within the block that was tagged with Seals will be rejected.
(d) Rejected Plants. Plant materials which do not meet these requirements will be rejected. Plant material rejected at the nursery or holding area shall not be delivered to the project; if delivered, it shall immediately be removed. Plants shall not be installed until the Plant Material Inspection has been completed and satisfactory identification has been provided.
920.07.03 Plant Material Standards. Plant material shall be grown, identified, graded, and delivered in good condition as specified in this section.
(a) Hardiness Zones and Origin. Trees, shrubs, perennials and ornamental grasses shall be nursery grown within plant hardiness zones 5, 6, or 7 according to the ‘USDA Plant Hardiness Zone Map’ in the following states, unless specified otherwise: Maryland, Ohio, Pennsylvania, New York, New Jersey, Delaware, Virginia, West Virginia, North Carolina, Tennessee, Kentucky, Georgia. Annuals and bulbs shall be nursery grown.
(b) Names and Identification. Refer to 920.06.01. Plant material shall be clearly and correctly identified by the grower or distributor. Plant materials that are misidentified, or not satisfactorily tagged or labeled, or do not conform to the accepted characteristics of the species or cultivar, will be rejected.
(c) ANSI Standards. Plant material shall conform to ‘American Standard for Nursery Stock (ANSI Z60.1) of the American Nursery and Landscape Association. Plant grades shall be those established in ANSI Z60.1, and shall include plants from that size up to but not including the next larger grade size. When specimen plants are specified by the Contract Documents, the specimen requirement shall also be met. Plant material which does not meet the standards of this section shall be rejected.
(d) Health and Sanitation. Plant material shall be dug and transported in conformance ANSI Z60.1. Bare root deciduous plants shall be delivered in a dormant condition. Roots shall be adequately protected and kept moist.
Plant material shall be in good health and be declared and certified free from disease and insects as required by law for transportation, and shall be free from pest-related stress and pest damage.
Plants shall be healthy, free from physical defects and stresses, and have well-developed branches and a vigorous root system. Plants shall not exhibit wilt, shriveling, insufficient root mass, broken or loose root balls, or inadequate protection.
Container grown plants shall be well rooted, vigorous and established in the size pot specified, shall have well balanced tops for their pot size, and shall not be root bound. Plants grown in fields or containers which include Ailanthus, Canada Thistle, Johnsongrass, or Yellow Nutsedge will be rejected.
(e) Shade and Flowering Trees. Shade and flowering trees shall be symmetrically balanced. Major branch unions shall not have ‘V’ shaped crotches, bark inclusion or unions derived from water sprouts (epicormic growth) capable of causing structural weakness.
Trees shall be free of unhealed branch removal wounds greater than 1 in. diameter, or wounds or scars caused by staking, wire or ties, or any other defect which could cause structural failure or disfigurement.
Shade trees and central leader flowering trees shall have a single main trunk. Trunk height to the lowest branch shall conform to the following:
HEIGHT TO LOWEST BRANCH
CALIPER

in.

HEIGHT

ft

1-1/2 and 1-3/4 4
2 to 2-1/2 5
3 6
(f) Unacceptable Plants. Plant material that becomes unacceptable after installation shall be rejected as specified in 710.03.18.
920.07.04 American Holly (Ilex opaca Aiton). Unless other cultivars or ratios are specified in the Contract Documents, each lot of plants shall include 90 percent female plants and 10 percent male plants of cultivars selected from the following list, unless specified otherwise.
AMERICAN HOLLY CULTIVARS
FEMALE MALE
Angelica Miss Helen David
Arlene Leach Old Heavy Berry Jersey Knight
B and O Patterson Leather Leaf
Dan Fenton Satyr Hill Nelson West
Jersey Princess Wyetta North Wind
920.07.05 Plant Storage and Handling. Adequate facilities shall be provided for plant storage. Plants shall be handled with care to avoid damage.
(a) Bulbs. Bulbs shall be stored under appropriate climate control.
(b) Perennials, Ornamental Grasses, Plug Plants and Annuals. Perennials, ornamental grasses, plug plants and annuals shall be kept moist.
(c) Bare Root Plants and Live Stakes. Bare root plants and live stakes shall be kept moist and heeled into moist soil or other suitable material until installed. During transport, the roots shall be covered with canvas, burlap or straw.
(d) Balled and Burlapped and Container Grown Plants. Balled and burlapped plants and container grown plants shall be kept moist and installed within seven days of delivery, or the root balls or containers shall be covered with mulch or straw until removed for installation.
920.08 MARKING AND STAKING MATERIALS
920.08.01 Outline Stakes. Outline stakes shall be full cut 1.75 in. x 1.75 in. sound hardwood, 48 in. long, as approved.
920.08.02 Stakes. Stakes for supporting trees shall be rough sawn, straight grain hardwood reasonably free from bark, knot holes, excessive warping, or other imperfections. Stakes shall be full cut 2.0 in. x 2.0 in. thickness.
920.08.03 Wire. Wire shall be No. 12 and 14 gauge new annealed galvanized wire.
920.08.04 Wire Rope. Wire rope shall be 0.25 in. zinc coated steel wire seven strand as commonly used for guying large trees.
920.08.05 Cable Clamps. Cable clamps shall be zinc galvanized steel.
920.08.06 Hose. Hose shall be 5/8 in. inside diameter corded synthetic rubber hose.
920.08.07 Turnbuckles. Turnbuckles shall be zinc galvanized with 4.5 in. openings and 5/16 in. threaded ends with screw eyes.
920.08.08 Anchors. Tree anchors shall be earth anchors of a type commonly used for anchoring large trees.
920.09 WATER, PESTICIDES, AND ADJUVANTS
920.09.01 Water. Water used for the installation and establishment of vegetation shall not contain concentrations of substances that are harmful to plant growth. Water derived from public and municipal water systems in Maryland shall be acceptable for irrigation, fertilization, or mixing with pesticides. Water derived from wells or other sources may be used when it has soluble salts concentration less than 500 ppm, sodium less than 50 percent of total salts, and pH between 5.0 to 7.8.
920.09.02 Seed Carrier. Seed carrier shall be one or more inert, horticultural-grade materials used to improve seed mixing and distribution through a spreader or drill. Seed carriers shall be free flowing, easily mixable with seed, and nontoxic to seed, plants, humans, and wildlife. Seed carrier shall include one or more of the following:
(a) Calcined Clay. Calcined clay shall be a furnace-baked clay product.
(b) Cocoa Shell. Cocoa shell shall be processed cocoa seeds.
(c) Oyster Shell. Oyster shell shall be crushed shells of oyster or other mollusk.
(d) Vermiculite. Vermiculite shall be heat-expanded mineral mica.
(e) Perlite. Perlite shall be heat-expanded mineral perlite.
920.09.03 Pesticides. Pesticides shall be EPA-approved and registered for use in Maryland to control plants, fungi, insects or other pests. Pesticides shall be approved for use, and acceptable application rates established by the Landscape Programs Division as follows:
(a) Herbicide. Herbicide shall control or prevent regrowth of plants or vegetation.
(b) Insecticide. Insecticide shall control or protect against insect or other arthropod pests.
(c) Fungicide. Fungicide shall control or protect against fungal or bacterial pests.
(d) Other Pesticides. Other pesticides shall control or protect against other pests such as deer, beaver, etc.
920.09.04 Marking Dye. Marking dyes shall be used to color spray solutions, be nonphytotoxic, oil or water soluble, and compatible with the pesticide products they are applied with. Marking dye products and application rates shall be approved by the Landscape Programs Division.
920.09.05 Spray Adjuvant and Wetting Agent. Spray adjuvant and wetting agents shall be compatible with the pesticides or other products they are applied with.
920.09.06 Antidesiccant. Antidesiccant and antitranspirant products shall be materials that provide a film over plant surfaces to limit water loss. These products and application rates shall be approved by the Landscape Programs Division.