The intent of these regulations is to promote practical community
development by reducing erosion and sedimentation and stimulating
groundwater recharge, to reduce glare and heat pollution, to stimulate
air purification and oxygen regeneration, to provide for noise abatement,
to assist in vehicular and pedestrian control, to maintain the Township's
natural amenities, and to provide for the harmonious development of
contiguous properties in different zoning districts by providing certain
minimum landscaping requirements for all future subdivisions and land
developments.
Street trees, softening buffers, screen buffers, parking area landscaping, stormwater management facility landscaping, and other landscaping shall be provided according to the standards listed under §
205-49, General requirements, and the following specific planting requirements:
A. Street trees.
(1) When required. Street trees shall be required for any subdivision
or land development where suitable street trees do not exist as part
of the design and construction of:
(b)
Existing streets when they abut or lie within the subdivision
or land development.
(c)
Access and/or private driveways to residential developments
serving four or more dwelling units.
(2) Street tree types and spacing.
(a)
Street tree types shall be selected and coordinated to provide
adequate separation from overhead and underground utilities, to provide
a cohesive street tree frontage that does not interfere with proposed
or existing features, to provide adequate visibility to the site,
and to fit well spatially.
(b)
Shade street trees.
[1]
Shade street trees shall be provided in accordance with the requirements of SLDO §
205-56A.
[2]
Shade street trees shall be spaced to permit the healthy growth
of each tree, but shall not be spaced closer than 35 feet on center
nor farther than 60 feet on center for each side of the street.
(c)
Small street trees.
[1]
Small street trees shall be used where overhead utility lines are present and where site layout, site density or good design practice necessitates the use of small street trees, in accordance with the requirements of SLDO §
205-56B.
[2]
Small street trees shall be located at a distance where the
mature size of the proposed tree species will not interfere with the
overhead utility lines.
[3]
Small street trees shall be provided at a ratio of two small
street trees for each required shade street tree, at a minimum spacing
of 24 feet on center.
(d)
Existing trees. Where existing trees over 2 1/2 inches
DBH are located within 10 feet of the legal or ultimate right-of-way,
whichever is greater, they may be counted toward the street tree requirement.
(e)
Informal street tree arrangements. Where appropriate, street
trees may be planted in informal groupings. If this method of street
tree arrangement is selected, the distance between tree groupings
or other street trees may not exceed 80 feet and shall be provided
in the required quantities for shade and small street trees as specified
above.
(3) Location.
(a)
Street trees shall be planted no closer than one foot outside
the legal or ultimate street right-of-way, whichever is greater.
(b)
Shade street trees shall be planted no closer than six feet to any public sidewalk or roadway, or 10 to 12 feet from any public sidewalk or roadway, as specified by species in SLDO §
205-56A(1) and
(2). Where small street trees are to be planted in accordance with this section, they shall be planted no closer than five feet to any public sidewalk or roadway.
(c)
At intersections, trees shall be located no closer than 50 feet
to the intersection of the curb.
(5) Where the location of required street trees overlaps with the locations
for required softening buffer, parking lot or stormwater management
facility landscaping, the required street trees may be used to count
toward those landscape requirements.
B. Softening buffers.
(1) Definition. A "softening buffer" is a mixed perimeter landscape planting
intended to provide an informal separation between neighboring developments.
It is not intended to be an impenetrable screen.
(2) Intent. Softening buffers shall be landscaped to "soften" and aesthetically
enhance the boundary between dissimilar land uses. They shall be designed
to provide light visual screening as well as light and noise abatement
between dissimilar land uses. A softening buffer should work in tandem
with any street trees, parking area landscaping, and stormwater management
facility landscaping that may be required adjacent to the buffer.
A softening buffer and any adjacent planting requirements should be
designed together to maximize plant health, aesthetic appeal, and
functional requirements without reducing visibility to the site or
overplanting the site.
(a)
The buffer area shall be used for no purpose other than the
planting of trees, shrubs and lawn to meet planting requirements and
shall be maintained and kept clean of debris, rubbish, noxious weeds
and invasive species.
(3) Location. Softening buffers shall be aligned adjacent and parallel
to the property perimeter adjacent to dissimilar land uses as indicated
in Table 1, including rights-of-way, but may be sited on any position
of the property if permitted by the Board of Supervisors. Plant material
used in the softening buffer shall be located within 20 feet of the
property line or within 20 feet of the legal or ultimate right-of-way
lines, whichever is farther from the street center line, and may be
grouped informally.
(a)
A softening buffer is not required where a screen buffer is
provided.
(b)
Softening buffers may be required in locations and along land
uses that are not listed at Table 1 at the discretion of the Board
of Supervisors.
(c)
Where softening buffer landscaping is located adjacent to parking
area plantings or stormwater facility perimeter plantings, trees and
shrubs for one requirement may be used, where appropriate, to count
towards multiple requirements so long as the design and functionality
of the plantings meet the intent of all landscape requirements.
(d)
Where softening buffers are required along an existing or proposed
street right-of-way where street trees exist or are proposed, only
softening buffer shrubs shall be required.
(4) Performance standards.
(a)
Existing vegetation should be maintained in buffer and yard
areas and may be used to meet, or partially meet, softening buffer
requirements. However, any existing vegetation proposed to be used
to meet or partially meet buffer requirements shall be free of noxious
weeds and invasive species. If the existing vegetation contains noxious
weeds and/or invasive species, these plants shall be removed and eradicated
prior to the acceptance of such areas for the start of maintenance.
(b)
Within the buffer area, no slopes shall be steeper than one
foot in height for each four feet in width (slope of 25%).
(c)
Softening buffers may include a wall or fence that meets the standards outlined in §
230-148, Fences and walls, of the Montgomery Township Zoning Code. Any wall or fence shall be constructed in such a manner that it will not conflict with sight lines or conflict with the character of the abutting land use.
(d)
Softening buffers should be planted with a mix of shade trees,
ornamental trees and shrubs with evergreen trees added into planting
arrangements as deemed necessary or desired. Softening buffers shall
be landscaped to provide visual screening, light and noise abatement,
and safety barriers between dissimilar land uses and zoning districts.
(e)
All softening buffer landscaping shall be planted in such a
way to create a 50% visual screen within five years of planting.
(f)
Plant materials used in softening buffers shall meet the minimum size requirements for plant material as provided in SLDO §
205-56, Recommended Plant List.
(g)
Not more than 20% of plants shall be evergreen.
(i)
Refer to §
205-56 for recommended plant material.
C. Screen buffers.
(1) Definition. A "screen buffer" is a predominantly evergreen perimeter
landscape planting intended to provide a formal visual separation
between neighboring developments.
(2) Intent. A screen buffer is intended to be an impenetrable visual
screen. However, it is not intended to be a monocultural planting.
A variety of evergreen tree species in conjunction with deciduous
and/or evergreen shrubs should be utilized to provide complete screening
and aesthetic variety and appeal. Screen buffer landscaping should
work in tandem with any street trees, parking area landscaping, and
stormwater management facility perimeter landscaping that may be required
adjacent to the buffer. Screen buffers and any adjacent planting requirements
should be designed together to maximize screening, shade, plant health,
aesthetic appeal, and functional requirements without overplanting.
(3) When required.
(a)
Refer to Table 1 for requirements for each land use.
(b)
Screening buffers may be required in locations and along land
uses that are not listed at Table 1 at the discretion of the Board
of Supervisors.
(c)
In addition, all truck loading, outside storage areas, mechanical equipment and trash receptacles shall be screened from view from streets and abutting residential areas in accordance with the standards for screen buffer size and type [§
205-52C(4)(a) and
(b) below].
(4) Location.
(a)
The screen buffer is to provide a visual barrier between adjacent
land uses. The screen buffer shall be aligned adjacent and parallel
to side and rear property lines and/or may be sited in any position
on the property if permitted by the Board of Supervisors.
(b)
Screen buffers shall be located within 20 feet of the property
lines or within 20 feet of the legal or ultimate right-of-way lines,
whichever is farther from the street center line.
(c)
The screen buffer shall be arranged to provide clear-sight triangles
at street intersections and shall not obstruct sight distance requirements
of the Township. The screen planting shall be continuous and shall
be broken only at points of vehicular or pedestrian access.
(5) Performance standards.
(a)
Trees used for screen buffers shall be composed of 100% evergreen
varieties. Shrubs may be a combination of evergreen and deciduous
varieties. Where a screen buffer is required between a residential
use and a nonresidential use, the required plant material shall be
arranged so as to provide a 100% visual screen within four years of
planting. In all other instances where a screen buffer is required,
the plant material shall be arranged so as to provide a 100% visual
screen within eight years of planting.
(b)
Where the screen buffer planting requires more than 50 trees,
no more than 1/3 of these trees will be of a single variety.
(c)
Where space is limited or there are other site constraints, walls, fences and/or earth berms may be used in combination with plant material subject to the approval of the Board of Supervisors and in conformance with §
230-148, Fences and walls, of the Zoning Ordinance.
(d)
Where screen buffers are required adjacent to parking areas
or stormwater management facility landscaping, plantings from the
other requirements may be used to count towards the screen buffer
requirements as long they meet the intent of both requirements.
D. Parking area landscaping.
(1) Definition: Parking area landscaping includes shade and ornamental
trees and shrubs installed around and within off-street parking areas
including planting islands, divider islands, and around the parking
lot perimeter.
(2) Intent: The primary goal of parking area landscaping is to provide
shade and mitigate heat within parking areas through the planting
of shade and ornamental trees. The secondary goal of parking area
landscaping is to provide shrub groupings to soften, beautify, and
visually break up parking area paving, while providing screening and
protection from headlight glare, where needed. Parking area landscaping
should work in tandem with any street trees, softening buffers, parking
area landscaping, and stormwater management facility perimeter landscaping
that may be required adjacent to the parking area. Parking area landscaping
and any adjacent planting requirements should be designed together
to maximize shade, plant health, aesthetic appeal, and functional
requirements without reducing visibility, or overplanting.
(3) Location and plantings:
(a)
A maximum of 10 parking spaces shall be permitted in a row without
a landscape island of 15 feet in width. If required, this island shall
contain not less than 290 square feet of planting area.
(b)
Planter islands shall be placed at the end of each row of parking
spaces beginning and/or terminating at an internal circulation drive.
(c)
For any land use where the total number of parking spaces exceeds
100, the parking area shall be divided by continuous islands perpendicular
to the parking spaces every 124 feet. This is four rows of parking
at a total width of 80 feet and two aisles at a total width of 44
feet. These divider islands shall be a minimum of 20 feet wide. Entrance
driveways shall be 20 feet wide. Snow storage areas shall be provided
and planting design shall consider pedestrian circulation.
(e)
All aforementioned islands and the perimeter areas surrounding
parking lots shall be landscaped with a mix of shade trees, ornamental
trees, and shrubs.
(f)
Shade trees should be the primary planting type within parking
areas with a goal of providing some degree of shade to every space
in the parking area within five years of planting.
(g)
Ornamental trees may be used to supplement shade trees in locations
where space is limited or where desired for aesthetic affect, so long
as they do not account for more than 30% of the total trees provided
in the parking area. Ornamental tree shade may be used to count towards
the requirement of providing some degree of shade to every space within
the parking area within five years of planting.
(h)
Shrubs or shrub groupings should be provided within islands
and along parking perimeter areas with the intent of softening, beautifying,
and visually breaking up the parking areas.
(i)
When parking areas are located within 100 feet of a public street
or anytime a parking area for a nonresidential use is located adjacent
to a residential use, the perimeter of the parking area that is adjacent
to the public street or residential use shall be softened by a continuous
low hedge around the outside perimeter. The shrubs that create this
low hedge shall fully screen the glare from vehicle headlights within
two years of planting. Required softening or screening buffer shrubs
may be used to meet this requirement if the species are selected and
planted in such a manner as to provide full screening from headlight
glare, within two years of planting.
(j)
Where parking areas are located adjacent to required street
trees, softening or screening buffers, or stormwater management perimeter
plantings, the trees used to meet the other requirements may be used
to count towards parking area tree requirements as long as the shade
requirement is still met.
(k)
Where parking areas are located adjacent to required softening
buffers or stormwater management perimeter plantings, the shrubs used
to meet either of the other requirements may be used to count towards
the parking area shrub requirements.
E. Stormwater management facility landscaping.
(1) Whenever a stormwater management facility is provided, such facility shall conform to the requirements set forth in §
205-18D, Stormwater management, the standard specifications on file with the Township, and the landscaping requirements of this section.
(2) For the purposes of this section, "stormwater management facilities"
shall refer to aboveground man-made structures including, but not
limited to, detention and retention basins, rain gardens, vegetated
swales and drainageways that convey, store, or otherwise affect stormwater
runoff quality, rate or quantity.
(3) The facility shall be so designed that the planting in and adjacent
to it shall not have a negative effect on the hydrological function
of the facility.
(4) Stormwater management facilities should be aesthetically pleasing
and compatible with adjacent land uses. Stormwater management best
management practices (BMPs), creative grading, and innovative stormwater
management facility forms are encouraged. Where stormwater management
facilities adjoin existing woodlands, it is recommended that plantings
be selected to blend with the natural surroundings.
(5) Stormwater management facility floors.
(a)
Floors dry most of the year shall be landscaped in one or a
combination of the following:
[1]
Seeded in low-maintenance wildflowers and meadow grasses.
(b)
Floors, portions of a floor or channels which are wet most of
the year shall be landscaped in one or a combination of the following:
[1]
Wet habitat grasses and ground covers.
[2]
Seeded in wildflower mix for wet areas.
(6) Stormwater management facility slopes. Slopes shall be seeded in
PennDOT Formula "L" modified seed mix or an appropriate naturalized
seed mix.
(7) Stormwater management facility perimeter plantings.
(a)
Definition: Plantings placed around stormwater management facilities
which provide naturalization and aesthetic enhancement without impeding
the function of the facility.
(b)
Intent: stormwater management facility perimeter landscaping
is not intended to screen a proposed stormwater management facility.
Rather, it is intended to fulfill stormwater management BMP functional
requirements while allowing the facility to blend with its natural
surroundings and providing aesthetic, habitat, and stormwater benefits
to the site. Plantings should be placed around all aboveground stormwater
management facilities with the goals of naturalization, providing
aesthetic enhancement, and enhancing wildlife habitat without impeding
hydrological function of the facility in any way. Stormwater management
facility perimeter landscaping should work in tandem with any required
street trees, softening buffers, and/or parking area landscaping that
may be required adjacent to the stormwater facility. Stormwater management
facility landscaping and any adjacent planting requirements should
be designed together to maximize plant health, aesthetic appeal, and
functional requirements without reducing visibility, where needed,
or overplanting.
(c)
Location: Trees and shrub groupings shall be installed around
the perimeter of the stormwater management facility. No tree planting
shall be placed on the fill area of the berm or on the spillway.
[1]
Where stormwater management facility perimeter landscaping is
located adjacent to required street trees, parking area plantings
and/or softening buffers, the shade and ornamental trees from these
planting requirements may be used to count towards the stormwater
management facility perimeter landscaping tree requirements.
[2]
Where stormwater management facility perimeter landscaping is
located adjacent to required parking area plantings and/or softening
buffers, the shrubs from these planting requirements may be used to
count towards the stormwater facility management landscaping requirements.
(d)
Planting: Trees and shrub groupings shall be planted in such
an arrangement around stormwater management facility perimeters as
to allow for a naturalizing effect. In order to achieve this, a minimum
of 50% of the circumference of the facility shall be planted with
a mix of trees and shrubs to allow for adequate coverage. Shade, ornamental,
and evergreen trees must account for at least 25% of the total stormwater
management facility plantings provided. To promote diversity, shade
trees may be substituted with ornamental or evergreen trees, where
desired.
F. Steep slope landscaping.
(1) When required. Steep slope landscaping includes disturbed areas of
the site with slopes in excess of one foot vertical to six feet eight
inches horizontal (6.67:1, slope of 15%).
(2) Sodded lawn. Sodded lawn is required on slopes of 6.67:1 (15%) or
greater, except where ground cover plantings have been provided.
(3) Ground cover plantings.
(a)
Ground cover plantings are required on slopes of three to one
or greater (one foot vertical to three feet horizontal, 33%).
(b)
Refer to §
205-56, Recommended plant list, and planting practices for recommended ground covers.
(4) Supplemental plantings.
(a)
Supplemental plantings of shrubs, ornamental trees, evergreen
trees and shade trees may be planted as a part of steep slope landscaping.
(b)
Supplemental plantings may be applied toward the replacement tree requirements of §
205-54, except where these plantings are required by other sections of this chapter.
G. Landscaping of other areas. Any area not used for buildings, structures,
paved areas, planting beds or screening shall be planted in an all-season
ground cover or lawn and other landscape materials in accordance with
the landscape plan. Existing vegetative materials shall be preserved
wherever possible.
H. Existing vegetation. In cases where preserved natural features existing
on site duplicate or essentially duplicate the planting requirements
of this chapter, these requirements may be waived or amended by the
Board of Supervisors.
The following is the recommended list of trees, shrubs and ground
cover for use in Montgomery Township. The Board of Supervisors may
permit other planting types if they are hardy to the area, not subject
to blight or disease and of the same general character and growth
habit as those listed below, and are not identified by the Pennsylvania
Department of Conservation and Natural Resources (DCNR) as invasive.
Plants included on the DCNR "watch list" as potentially invasive,
and any associated varieties, hybrids, and cultivars of invasive species,
will not be permitted. Plants listed below that may be added to DCNR's
list of invasive plants after the adoption of this section shall not
be permitted. The size requirements listed herein for shade trees,
evergreen trees, ornamental trees, deciduous shrubs, evergreen shrubs
and ground cover are the minimum acceptable sizes at the time of installation.
Size and grading standards for all plants shall conform to those specified
by the American Nursery and Landscape Association's American
Standard for Nursery Stock, ANSI Z60.1-2014 or latest edition.
A. Shade Street Trees: minimum size of 2.5-inch caliper, 12 feet to
14 feet in height with a full branching structure. All main branches
shall be pruned to a height of six feet above the ground. Street trees
shall have a single, straight trunk and unpruned central leader free
of codominant stems within the lower half of the crown, and shall
be free of disease and mechanical damage. Where appropriate due to
proposed and/or existing site conditions, columnar form trees may
be used.
(1) The following street trees shall be located a minimum of six feet
from sidewalks and roadways.
Acer rubrum - Red maple
|
Carpinus betulus - European hornbeam
|
Cercidiphyllum japonica - Katsuratree
|
Gingko biloba - Gingko (Male varieties only)
|
Koelreuteria paniculata - Golden raintree
|
Liquidambar styraciflua var. 'Rotundiloba' - Seedless
sweetgum
|
Metasequoia glyptrostroboides - Dawn redwood
|
Nyssa sylvatica - Blackgum
|
Ostrya virginiana - American hophornbeam
|
Quercus acutissima - Sawtooth oak
|
Quercus alba - White oak
|
Quercus borealis - Northern red oak
|
Quercus coccinea - Scarlet oak
|
Quercus imbricaria - Shingle oak
|
Quercus lyrata - Overcup oak
|
Quercus montana - Chestnut oak
|
Quercus phellos - Willow oak
|
Quercus rubra - Red oak
|
Tilia cordata - Littleleaf linden
|
Tilia tomentosa - Silver linden
|
Ulmus spp. - Elm (Dutch elm disease resistant varieties only)
|
Zelkova serrata - Japanese zelkova
|
(2) The following street trees shall be located a minimum of 10 feet
to 12 feet from sidewalks and roadways.
Acer saccharum - Sugar maple (heat- and drought-resistant varieties
only)
|
Carya glabra - Pignut hickory
|
Carya ovata - Shagbark hickory
|
Celtis occidentalis - Hackberry
|
Cladrastis kentukea - Yellowwood
|
Fagus grandifolia - American beech
|
Fagus sylvatica - European beech
|
Gleditsia triacanthos var. 'inermis' - Thornless honeylocust
|
Gymnocladus dioicus - Kentucky coffeetree (fruitless forms)
|
Liriodendron tulipifera - Tulip poplar
|
Magnolia acuminata - Cucumbertree magnolia
|
Platanus x acerifolia - London planetree
|
Quercus palustris - Pin oak
|
B. Small Street Trees: the following trees shall be used when small street trees are required in accordance with SLDO §
205-52A(2)(c). Small street trees shall be a minimum of 1 1/2 inches in caliper, eight feet to 10 feet in height, and shall have a full branching structure. All main branches shall be pruned to a clearance height of five feet above the ground. Small street trees shall have a single, straight trunk and unpruned central leader free of codominant stems within the lower half of the crown, and shall be free of disease and mechanical damage. Where appropriate due to proposed and/or existing site conditions, columnar form trees may be used.
Acer griseum - Paperbark maple
|
Carpinus caroliniana - Ironwood
|
Cercis canadensis - Eastern redbud
|
Chionanthus virginicus - Fringetree
|
Cornus florida - Flowering dogwood
|
Cornus kousa - Kousa dogwood
|
Cornus mas - Cornelian cherry
|
Cornus x 'Rutban' - Aurora dogwood
|
Cotinus coggyria - "Smoke tree"
|
Crataegus crusgalli var. inermis - Thornless cockspur hawthorn*
|
Crataegus phaenopyrum - Washington hawthorn*
|
Crataegus viridis 'Winter King' - Winter king hawthorn*
|
Malus spp. - 'Adirondack,' 'Prairifire,'
or 'Professor Sprenger'*
|
Oxydendrum arboreum - Sourwood
|
Prunus spp. - 'Autumnalis,' 'Kwanzan,' 'Okame,'
or 'Yoshino'*
|
Syringa reticulata 'Ivory Silk' or 'Summer Snow'
|
Styrax japonicas - Japanese snowbell
|
Tilia cordata 'Halka
|
*
|
Other disease-resistant varieties permitted where the average
landscape size does not exceed 35 feet in height.
|
C. Shade trees: minimum of 2.5 inches in caliper, 12 feet to 14 feet
in height with a full branching structure. All main branches shall
be pruned to a height of six feet above the ground. Trees shall have
a single, straight trunk and unpruned central leader free of codominant
stems within the lower half of the crown and shall be free of disease
and mechanical damage. All trees shall be located a minimum of six
feet from sidewalks and roadways.
Acer rubrum - Red maple
|
Acer saccharinum - Silver maple
|
Acer saccharum - Sugar maple (heat- and drought-resistant varieties
only)
|
Carya glabra - Pignut hickory
|
Carya ovata - Shagbark hickory
|
Celtis occidentalis - Hackberry
|
Cercidiphyllum japonica - Katsuratree
|
Cladrastis kentukea - Yellowwood
|
Fagus grandifolia - American beech
|
Fagus sylvatica - European beech
|
Gingko biloba - Gingko (male varieties only)
|
Gleditsia triacanthos var. 'inermis' - Thornless honeylocust
|
Gymnocladus dioicus - Kentucky coffeetree (fruitless forms)
|
Koelreuteria paniculata - Golden raintree
|
Liquidambar styraciflua - Sweetgum, including var. 'Rotundiloba'
and 'Happidaze'
|
Liriodendron tulipifera - Tulip poplar
|
Metasequoia glyptrostroboides - Dawn redwood
|
Nyssa sylvatica - Blackgum
|
Ostrya virginiana - American hophornbeam
|
Platanus x acerifolia - London planetree
|
Quercus acutissima - Sawtooth oak
|
Quercus alba - White oak
|
Quercus bicolor - Swamp white oak
|
Quercus borealis - Northern red oak
|
Quercus coccinea - Scarlet oak
|
Quercus falcata - Southern red oak
|
Quercus imbricaria - Shingle oak
|
Quercus lyrata - Overcup oak
|
Quercus macrocarpa - Burr oak
|
Quercus montana - Chestnut oak
|
Quercus muehlenbergii - Chinkapin oak
|
Quercus palustris - Pin oak
|
Quercus phellos - Willow oak
|
Quercus rubra - Red oak
|
Quercus shumardii - Shumard oak
|
Taxodium distichum - Bald cypress
|
Tilia americana - American basswood
|
Tilia cordata - Littleleaf linden
|
Tilia tomentosa - Silver linden
|
Zelkova serrata - Japanese zelkova
|
D. Evergreen trees: minimum eight feet to 10 feet height, single leader
with no codominant stems, symmetrically branching to the ground, and
free of disease and mechanical damage.
Abies balsamea - Balsam fir
|
Abies concolor - White fir
|
Chamaecyparis thyoides - Atlantic white cedar
|
Ilex opaca - American holly
|
Juniperus virginiana - Eastern redcedar
|
Picea abies - Norway spruce
|
Picea glauca - White spruce
|
Picea mariana - Black spruce
|
Picea pungens - Colorado spruce
|
Pinus banksiana - Jack pine
|
Pinus echinata - Shortleaf pine
|
Pinus resinosa - Red pine
|
Pinus rigida - Pitch pine
|
Pinus strobus - White pine
|
Pinus sylvestris - Scotch pine
|
Pinus taeda - Loblolly pine
|
Pinus thunbergii - Japanese black pine
|
Pinus virginiana - Virginia scrub pine
|
Thuja spp. - Arborvitae (deer resistant varieties only)
|
E. Ornamental/flowering trees: minimum 1 1/4 inches caliper, eight
feet to 10 feet height and full branching structure. Trees shall have
a single, straight trunk and unpruned central leader free of codominant
stems within the lower half of the crown, and shall be free of disease
and mechanical damage. Clump, shrub and multistem forms shall be permitted
at a minimum height of eight feet to 10 feet and a minimum root ball
diameter of 28 inches to 32 inches.
Acer griseum - Paperbark maple
|
Acer pennsylvanicum - Striped maple
|
Amelanchier arborea - Downy serviceberry
|
Amelanchier canadensis - Serviceberry
|
Amelanchier laevis - Allegheny serviceberry
|
Asimina triloba - Common pawpaw
|
Betula lenta - Sweet birch
|
Betula nigra - River birch
|
Betula papyrifera - Paper birch
|
Betula populifolia - Gray birch
|
Carpinus caroliniana - American hornbeam
|
Cercis canadensis - Eastern redbud
|
Chionanthus virginicus - Fringetree
|
Cornus florida - Flowering dogwood
|
Cornus kousa - Kousa dogwood
|
Cornus mas - Cornelian cherry
|
Cornus x 'Rutban' - Aurora dogwood
|
Cotinus coggyria - "Smoke Tree"
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Crataegus crusgalli var. inermis - Thornless cockspur hawthorn*
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Crataegus phaenopyrum - Washington hawthorn*
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Crataegus viridis 'Winter King' - Winter king hawthorn*
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Diospyros virginiana - Common persimmon
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Halesia carolina - Carolina silverbell
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Larix laricina - American larch
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Magnolia tripetala - Umbrella magnolia
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Magnolia virginiana - Sweetbay magnolia
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Magnolia x soulangeana - Saucer magnolia
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Malus spp. - 'Adirondack,' 'Prairifire,'
or 'Professor Sprenger'*
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Oxydendrum arboreum - Sourwood
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Prunus spp. - 'Autumnalis,' 'Kwanzan,' 'Okame,'
or 'Yoshino'*
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Ptelea trifoliata - Wafer-ash
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Sassafras albidum - Common sassafras
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Styrax japonicas - Japanese snowbell
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Syringa reticulata - 'Ivory Silk' or 'Summer
Snow'
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Tilia cordata 'Halka'
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Taxodium distichum - Baldcypress
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*
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Other disease-resistant varieties permitted.
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F. Deciduous shrubs: minimum acceptable container classes #5, #7, #10,
with a thirty-inch minimum height, symmetrically branched to the ground,
and free of disease and mechanical damage.
Aesculus parviflora - Bottlebrush buckeye
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Alnus rugosa - Speckled alder
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Alnus serrulata - Smooth alder
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Aronia arbutifolia - Red chokecherry
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Aronia melanocarpa - Black chokecherry
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Callicarpa americana - American beautyberry
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Calycanthus florida - Sweetshrub
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Castanea pumila - Allgheny chinquapin
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Ceanothus americanus - New Jersey tea
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Cephalanthus occidentalis - Buttonbush
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Clethra alnifolia - Summersweet clethra
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Comptonia peregrina - Sweetfern
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Cornus amomum - Silky dogwood
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Cornus racemosa - Gray dogwood
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Cornus sericea - Redosier dogwood
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Corylus americana - American filbert
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Cotinus obovatus - American smoke tree
|
Deutzia spp. - Deutzia
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Euonymus americanus - Strawberrybush
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Fothergilla gardenii - Dwarf fothergilla
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Fothergilla major - Large fothergilla
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Hamamelis vernalis - Spring witch hazel
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Hamamelis virginiana - Common witch hazel
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Hydrangea arborescens - Smoothleaf hydrangea
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Hydrangea quercifolia - Oakleaf hydrangea
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Hypericum prolificum - Shrubby St. John's wort
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Ilex verticillata - Winterberry holly
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Itea virginica - Virginia sweetspire
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Leucothoe racemosa - Sweetbells leucothoe
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Lindera benzoin - Spicebush
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Myrica pennsylvanica - Northern bayberry
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Physocarpus opulifolius - Eastern ninebark
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Rhododendron spp. - Native deciduous azalea and rhododendron
varieties
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Rhus glabra - Smooth sumac
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Rosa carolina - Carolina rose
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Rosa palustris - Swamp rose
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Rosa virginiana - Virginia rose
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Salix discolor - Pussy willow
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Sambucus canadensis - Elderberry
|
Spiraea japonica 'Anthony Waterer' - Anthony Waterer
spiraea
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Spiraea x vanhouttei - Vanhoutte spiraea
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Styrax americanus - American snowbell
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Symphoricarpos albus - Snowberry
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Symphoricarpos orbiculatus - Coralberry
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Viburnum acerifiolium - Mapleleaf viburnum
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Viburnum carlesii - Koreanspice viburnum
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Viburnum cassinoides - Witherod viburnum
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Viburnum dentatum - Arrowwood viburnum
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Viburnum lentago - Nannyberry viburnum
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Viburnum prunifolium - Blackhaw viburnum
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Viburnum trilobum - American cranberrybush viburnum
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G. Evergreen shrubs: minimum acceptable container classes #5, #7, #10,
with a twenty-four-inch minimum height and eighteen-inch minimum spread,
symmetrically branched to the ground, and free of disease and mechanical
damage. Spreading evergreen shrub forms shall be permitted at a minimum
twenty-four-inch spread and in minimum acceptable container classes
#5, #7, and #10.
Ilex spp. - Japanese holly and other evergreen shrub hollies
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Ilex glabra - Inkberry holly
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Juniperus spp. - Juniper
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Kalmia spp.
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Leucothoe spp.
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Mahonia aquifolium - Oregon grape
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Pieris spp.
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Prunus laurocerasus - Cherry laurel
|
Rhododendron spp. - Native evergreen azalea and rhododendron
varieties
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Taxus spp.
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Viburnum spp. - Evergreen Viburnums
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H. Ground cover plants:
(1) Heavily rooted herbaceous plants provided in minimum four-inch pots
and spaced at a maximum of 12 inches on center, and free of disease
and mechanical damage.
Ajuga spp. - Bugleweed
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Asarum canadense - Wild ginger
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Carex pensylvanica - Pennsylvania sedge
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Chrysogonum virinianum - Green-and-gold
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Dennstaedtia punctolobula - Eastern hay-scented fern
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Hemerocallis hybrids - Daylilies (non-invasive species only)
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Heuchera spp. - Coral bells
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Liriope muscari - Liriope
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Liriope spicata - Lily turf
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Pachysandra procumbens - Alleghany pachysandra
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Phlox stolonifera - Creeping phlox
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Potentilla canadensis - Dwarf cinquefoil
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Sedum ternatum - Wild stonecrop
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Tiarella cordifolia - Heartleaf foamflower
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(2) Woody ground cover plants to be provided in minimum two-gallon containers
with a minimum 15 inches spread. Plants shall be spaced at a maximum
of 36 inches on center, and shall be free of disease and mechanical
damage.
Arctostaphylos uva-ursi - Bearberry
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Comptonia peregrina - Sweetfern
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Deutzia gracilis 'Nikko' - Nikko deutzia
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Itea virginica 'Sprich' - Little Henry Virginia sweetspire
|
Juniperus horizontalis - Creeping juniper
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Parthenocissus quinquefolia - Virginia creeper
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Paxistima canbyi - Mountain lover
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Rhus aromatica 'Gro Low'
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Xanthorhiza simplicissima - Yellowroot
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(3) Basin floor coverings:
Grass: PennDOT Formula "L" modified seed or other naturalized
mix
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Naturalized seed mix
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Wildflower sod
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