Delete: Section 920 — Landscaping Materials, in its entirety. Insert

1. 
   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	Elytrigia repens (L.) Gould
Rough Cocklebur	Xanthium strumarium L.
Serrated Tussock	Nassella trichotoma (Nees) Hack.
Wild Garlic	Allium vineale L.
Yellow Nutsedge	Cyperus esculentus L.

2. 
   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. var. vulgaris
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.

3. 
   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

1. 
   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.
   

2. 
   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.
   

3. 
   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.
   

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 Operations Division. The seed will be subject to use at increased seeding rates or measures to compensate for substandard seed purity, germination. weed content.

1. 
   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:
   

2. 
   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:
   

3. 
   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 Operations Division at increased seeding rates, or with measures to compensate for increased weed or crop seed content.
   

2. 
   Origin. 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 Operations 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
Bearded Beggarticks = Showy Tickseed	Bidens aristosa (Michx.) Britton
Blackeyed Susan	Rudbeckia hirta L. var. hirta Rudbeckia hirta L. var. pulcherrima Farw.
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.
Crimsoneyed Rose Mallow	Hibiscus moscheutos L.
Eastern Purple Coneflower	Echinacea purpurea (L.) Moench
Flat-top Goldenrod = 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
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
Trumpetweed = Joe Pye Weed	Eupatoriadelphus fistulosus (Barratt) King and H. Rob.
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.

4. 
   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: