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Denmark Village City Zoning Code

ARTICLE VIII

Landscaping

§ 315-170 Purpose.

The purpose of requiring landscaping as an integral element of urban development is to:
A. 
Provide vegetation to visually soften paved areas and buildings.
B. 
Establish positive environmental conditions by providing shade, air purification, oxygen regeneration, groundwater recharge, stormwater runoff retardation, improved water quality, noise, glare and heat abatement, and protection from the forces of erosion.
C. 
Buffer uncomplimentary land uses, lessen the impact of high-intensity uses, and generally enhance the quality and appearance over the entire site of the project.
D. 
Provide habitat for beneficial animals and insects.
E. 
Improve quality of life for the residents of, and visitors to, the Village of Denmark.

§ 315-171 Principles.

Individual lots and conditions will afford distinctive and varied opportunities for landscape treatment. A landscape plan shall consider the preservation of existing, desired vegetation. Mature tree species that provide a substantial canopy shall be retained if possible. Installation of additional plant materials shall augment existing vegetation.

§ 315-172 Administration.

A. 
Site plans. All nonresidential site plans submitted in accordance with this chapter shall include a landscape plan. All landscape plans shall be prepared by a qualified person and shall contain the following information:
(1) 
North arrow and scale.
(2) 
Topographic information based upon U.S. Government datum, and final grading adequate to identify and properly specify planting for areas needing slope protection.
(3) 
The location, size, and surface materials of all structures and parking areas.
(4) 
The location, type, size, quantity and botanical name and common name of all proposed landscape materials.
(5) 
The location, size, and common name of all existing plant materials to be retained on the site.
(6) 
Plant materials shall be drawn to a scale to reflect mature sizes.
B. 
Application. Applications shall be submitted to the Village Clerk for proper distribution.
C. 
Review and approval.
(1) 
The Zoning Administrator shall review all site plans submitted under this section and make a recommendation to the Plan Commission to approve, conditionally approve, or deny the landscape plan.
(2) 
The Plan Commission shall approve, conditionally approve, or deny the proposed landscape plan.

§ 315-173 Design criteria.

A. 
General requirements.
(1) 
Relationship to existing vegetation.
(a) 
The addition of new plant materials shall augment existing vegetation.
(b) 
Existing healthy and noninvasive species of trees, shrubs, or woodlands shall be incorporated in a landscape plan and contribute toward any quantity requirement.
(c) 
Diversity of vegetation species is required, although the selection of a plant palette shall consider new flora that is compatible with the growing and environmental requirements of existing vegetation.
(2) 
Placement and setting.
(a) 
The location, dimensions, and spacing of required plantings shall be adequate for their proper growth and maintenance, taking into account the sizes of such plantings at maturity and their present and future environmental requirements, such as wind, soil, moisture, and sunlight.
(b) 
Plants shall be spaced to provide optimum growing conditions and resemble a natural setting. Evenly spaced "picket fence" style plantings shall be avoided.
(3) 
Street adjacent planting. Trees or shrubs that are planted immediately adjacent to street and road rights-of-way shall be moderately tolerant of both salt spray and salt absorbed into the soil.
(4) 
Size.
(a) 
Canopy trees that are newly installed shall reach a minimum height and spread of 30 feet at maturity (10 years growth) as determined by the American Association of Nurserymen (AAN) Standards. New canopy trees shall have a minimum caliper of two inches at planting.
(b) 
Ornamental trees that are newly installed shall reach a typical minimum height of 15 feet at maturity, based on AAN Standards. Ornamental trees shall have a distinctive ornamental character such as showy flowers, fruit, habit, foliage, bark, or growth habit. New ornamental trees shall have a minimum caliper of 1.5 inches.
(5) 
Ground cover. All areas not covered by buildings or paving shall be covered with landscaping.

§ 315-174 Plant material types and quantities.

A. 
Hardiness. All plants shall be selected based upon compatibility with United States Department of Agriculture (USDA) hardiness zone for the Village of Denmark (at this time, Hardiness Zones 5a and 5b).
B. 
Plant standards. All plants shall meet the minimum standards for health, form, and root condition as outlined in the AAN Standards.
C. 
Species variation.
(1) 
Native or naturalized plant species shall be the dominant elements of a landscaping plan unless the applicant can provide information explaining to the satisfaction of the Plan Commission and Zoning Administrator why such requirements are not applicable.
(2) 
No single species shall exceed 35% of the proposed landscape plan.
(3) 
The majority of plant species included in the landscape plan shall be natives.

§ 315-175 District-specific design criteria.

A. 
R-4 District.
(1) 
Preservation and visual blending of the existing natural landscape features shall be a priority in landscape planning.
(2) 
Landscape buffer areas.
(a) 
Landscape buffers shall be established and maintained within the street yard outside of any right-of-way and in rear and side yards with the plant quantities and general plant types as indicated in the table below.
(b) 
Such buffers shall be established and maintained so as to frame the view of existing structures from the roadway and adjoining parcels.
(3) 
Required plantings.
Area
Minimum Requirement
Street yard - for each 50 feet of street/road frontage
Two canopy trees or one evergreen
One ornamental tree
Five medium-to-tall shrubs
Five low shrubs
Rear yard - for each 50 feet of property line
One canopy tree or one evergreen
One ornamental tree
Five medium-to-tall shrubs
Side yards - for each 50 feet of property line
Five medium-to-tall shrubs
Five low shrubs
Native species: No less than 50% of all proposed canopy trees, evergreens, ornamentals, and shrubs shall be native species.
B. 
B-2 and B-3 Districts.
(1) 
Preservation and visual blending of the existing natural landscape features shall be a priority in landscape planning.
(2) 
Landscape buffer areas.
(a) 
Landscape buffers shall be established and maintained within the street yard outside of any right-of-way and in rear and side yards with the plant quantities and general plant types as indicated in the table below.
(b) 
Such buffers shall be established and maintained so as to frame the view of existing structures from the roadway and adjoining parcels.
(3) 
Required plantings.
Area
Minimum Requirement
Street yard - for each 50 feet of street/road frontage
Two canopy trees and one evergreen
One ornamental tree
Five medium-to-tall shrubs
Rear yard - for each 50 feet of property line
One canopy tree or one evergreen
Five medium-to-tall shrubs
Five low shrubs
Side yards - for each 50 feet of property line
Five medium-to-tall shrubs
Five low shrubs
Native species: No less than 50% of all proposed canopy trees, evergreens, ornamentals, and shrubs shall be native species.
C. 
I-1 and I-2 Districts.
(1) 
Preservation and visual blending of the existing natural landscape features shall be a priority in landscape planning.
(2) 
Landscape buffer areas.
(a) 
Landscape buffers shall be established and maintained within the street yard outside of any right-of-way and in rear and side yards with the plant quantities and general plant types as indicated in the table below.
(b) 
Such buffers shall be established and maintained so as to frame the view of existing structures from the roadway and diminish the view of said structures from abutting nonindustrial parcels.
(3) 
Required plantings.
Area
Minimum Requirement
Street yard - for each 50 feet of street/road frontage
Three canopy trees
Two evergreens
Five medium-to-tall shrubs
Rear yard - for each 50 feet of property line
One canopy tree or 1 evergreen
Five medium-to-tall shrubs
Ten low shrubs
Side yards - for each 50 feet of property line
Five medium-to-tall shrubs
Ten low shrubs
Rear and side yards when abutting nonindustrial parcels
A buffer installed the full length of the property line comprised of fencing and vegetation, the latter of which shall comprise no less then 30% of the property line associated with each yard. Vegetated buffer shall be a minimum of 4 feet in height at time of planting and may be comprised of any combination of canopy trees, evergreens, and/or shrubs.
Native species: No less than 50% of all proposed canopy trees, evergreens, ornamentals, and shrubs shall be native species.
D. 
IN District.
(1) 
Preservation and visual blending of the existing natural landscape features shall be a priority in landscape planning.
(2) 
Landscape buffer areas.
(a) 
Landscape buffers shall be established and maintained within the street yard outside of any right-of-way and in rear and side yards with the plant quantities and general plant types as indicated in the table below.
(b) 
Such buffers shall be established and maintained so as to diminish and frame the view of existing structures from the roadway.
(3) 
Required plantings.
Area
Minimum Requirement
Street yard - for each 50 feet of street/road frontage
Three canopy trees or 2 evergreens
One ornamental tree
Five medium-to-tall shrubs
Rear yard - for each 50 feet of property line
One canopy tree or 1 evergreen
One ornamental tree
Five medium-to-tall shrubs
Ten low shrubs
Side yards - for each 50 feet of property line
Five medium-to-tall shrubs
Ten low shrubs
Native species: No less than 50% of all proposed canopy trees, evergreens, ornamentals, and shrubs shall be native species.
E. 
PDD District. Landscape requirements in the PDD District shall be determined on a case-by-case basis based upon the following factors:
(1) 
The zoning district and use of abutting parcels.
(2) 
The intensity of uses on the parcel(s) in question.
(3) 
Existing vegetation on parcel(s) in question and abutting parcels.

§ 315-176 Recommended species.

Latin Name
Common Name and Description
Code
Canopy Trees - 30 to 45 Feet in Height at Maturity
Acer truncatum
Shantung maple
Attractive fall foliage, disease and insect pests are seldom serious
O
Tilia cordata 'Halka' Summer Sprite
Littleleaf linden
Leaf color shifts from light green to glossy dark green to yellow throughout the seasons. Offers great shade due to a dense canopy. Yields nutlike fruit 1/4 inch in diameter. Grows in a pyramidal to oval shape. (Dwarf linden grows to height of 15 feet.)
Canopy Trees - Over 45 Feet in Height at Maturity
Acer x freemanii 'Celzam'
Celebration Freeman maple
Broadly ovate, has a compact upright crown with strong crotch angles; adaptable over a wide range of climate and soils, from wet to dry but neutral or acid soil preferred; disease-resistant foliage and less prone to storm damage; long lasting, dependable colorful autumn foliage.
Acer x freemanii 'Armstrong'
Armstrong Freeman maple
Upright narrow, has a dense crown with ascending branches and a central leader; grows best in full sun, well-drained soils, tolerant of temporary wet conditions, five-lobed leaves have a silvery underside, fall color is an orange-red, depending upon the season. Height: 50 to 70 feet; spread: 15 to 20 feet; habit/form: upright narrow; growth rate: fast; zone: 3 to 6.
Acer Rubrum
Red maple
The colorful red maple (Acer rubrum) not only decorates the landscape of Wisconsin with brilliant displays of scarlet and burgundy during the fall months, it also produces beautiful red-and-orange flowers during April and May. The red maple is a medium-sized tree that reaches heights between 40 and 70 feet tall. Summer foliage is medium-green and leaves are 2 to 4 inches long. Red maples thrive in full sun, but will tolerate partial shade. Although they adapt well to most soil conditions, the red maple will flourish in moist, acidic soils.
N, O
Acer Saccharum
Sugar maple
One of Wisconsin's finest native trees, but needs good growing conditions and plenty of room for its roots.
N, X
Celtis occidentalis 'Prairie Pride'
Common hackberry
Crown broadly globose and compact, ascending branches with yellow fall foliage; bark develops attractive corky warts; tolerates drought and alkaline soils, wet to dry sites, soil compaction, salt, and pollution; susceptible to nipple gall on leaves; recovers slowly from transplant.
Celtis occidentalis 'Prairie Sentinel'
Common hackberry
A. columnar form of hackberry, grows to about 45 feet tall but only gets 12 feet wide. This tree has the characteristic toughness of the species trees and is narrow enough to be used in tough urban landscapes or areas where there isn't much room but a tree is needed. "Prairie Sentinel" has yellow fall color and bears fruits that attract wildlife. It is drought tolerant and hardy in zones 4 to 9.
Corylus colurna
Turkish filbert
Conical, symmetrical crown; withstands a range of adverse conditions; no serious diseases or pests; little maintenance required; leaves not particularly attractive in the fall, does produce nuts which can be a problem in the fall.
Gleditsia triacanthos var. inermis 'Skyline' or 'Street Keeper'
Thornless honeylocust
Broadly ovate to irregularly vase-shaped with a lacy texture; adaptable to a wide range of soils; tolerates salt, heat, drought, compaction and other adverse urban conditions; the most common problems include nectria canker, thyronectria canker, honeylocust plant bug, honeylocust leaf hopper, prone to produce surface roots and basal suckers, sunscald on trunk, transplants readily; lacy crown allows more light to reach surrounding turf. 'Street Keeper' is a more upright form.
Gymnocladus dioicus 'Espresso'
Espresso Kentucky coffeetree
Native, no pest problems, the male tree bears no fruit, colorful autumn foliage; irregularly ovate canopy; provides open, light shade in summer; slow recovery after transplanting, then medium to fast growth rate; adaptable to urban conditions including alkaline soils, salt and drought; no pest problems; colorful autumn foliage.
O
Quercus x bebbiana Schneid
Bebb oak
A naturally occurring hybrid of white oak and bur oak; native, disease seldom serious, massive tree with stout branches, bark and branches are attractive; slow grower; ovate becoming broadly globose with age; durable tree that tolerates urban stresses and a wide range of soils; does produce acorns; transplant in spring.
Quercus bicolor
Swamp white oak
Broadly ovate to globose; native to moist or swampy sites, tolerates imperfect drainage after establishment; tolerates drought, salt and soil compaction in urban environments; partial to full sun; chlorotic on alkaline soil and susceptible to some diseases and pests which seldom cause serious problems, less susceptible to oak wilt than red/black oaks; acorns can be a litter problem during mass fruitings; transplant in spring.
Quercus macrocarpa
Bur oak
Native; massive tree with stout branches, bark and branches are attractive; slow grower; ovate becoming broadly globose with age; durable tree that tolerates urban stresses and a wide range of soils, from moist to dry and acid to alkaline, although it is naturally occurring on alkaline soils; diseases and insects seldom cause serious problems; does produce acorns; transplant in spring.
N
Quercus x 'Pyramich' 'Skymaster'
Hybrid oak
Narrowly ovate crown, disease seldom serious, does produce acorns; transplant in spring.
Quercus muehlenbergii
Chinquapin oak
Native, disease seldom serious, does produce acorns; transplant B&B in spring
N
Quercus robur x Quercus bicolor 'Long'
'Regal Prince' hybrid oak
Disease seldom serious, does produce acorns; transplant in spring.
Quercus rubra
Northern red oak
Native; broadly ovate, somewhat open canopy; slow growth initially after transplanting then becomes fast; native to moist sites but prefers well drained, acid soils and partial to full sun; tolerates urban stresses — salt, compacted soil and pollutants; susceptible to some diseases and pests which seldom cause serious problems; acorns can be a litter problem during mass fruitings; transplant in spring.
N
Quercus x schuettei
Schuettei oak
Naturally occurring hybrid of swamp white oak and bur oak; native, disease seldom serious, massive tree with stout branches, bark and branches are attractive; slow grower; ovate becoming broadly globose with age; durable tree that tolerates urban stresses and a wide range of soils; does produce acorns; transplant in spring.
Tilia americana
Basswood
In addition to being a majestic tree in the landscape, basswood is a soft, light wood and prized for hand carvings and making baskets. The tree makes an excellent landscape plant with some tolerance to urban conditions depending on the cultivar. It is a perfect shade tree and can be used as a residential street tree.
Ulmus x 'Frontier'
Frontier elm
Released in 1990 by the USDA; high degree of resistance to DED, moderate resistance to elm leaf beetle, and high tolerance to the phytoplasma-caused elm yellows. Emerging leaves in spring are red, gradually changing to yellow-green in summer, finally turning red-purple in autumn; pyramidal instead of vase-shaped as it matures; sustained some low-temperature injury in Minnesota, reliably hardy only through USDA zone 5.
Evergreen Trees
Abies concolor
White fir
Native to the United States; gray-green foliage; moderate growth rate, broadly conical; height up to about 70 feet; tolerates dry soil, heat; no serious pests; a good alternative to Colorado blue spruce.
Juniperus virginiana
Easter red cedar
An evergreen tree that may grow 30 to 40 feet tall. The tree has scale-like, closely oppressed, glandular leaves. The bark is red-brown in color, exfoliating in long, fibrous strips, often ashy gray where exposed. Small, light blue-green clusters of flowers mature in late winter or early spring.
Picea glauca
White spruce
A large tree with a narrow crown, it can grow to 40 meters tall and 1 meter in diameter when mature. Needles are four-sided, sharp, and stiff, and are arranged spirally on the twigs; whitish-green and foul smelling when young, they become pleasant smelling with age.
N
Pinus nigra
Austrian pine
Features dark green needles grown in bundles of two that sometimes curve or twist slightly. They are 3 to 6 inches long and persist for 4 to 8 years, giving the tree its dense crown. Produces somewhat oval, light brown cones that are 2 to 4 inches in length. Each scale is tipped with a small prickle.
Pinus strobus
Eastern white pine
Eastern white pine is an evergreen gymnosperm tree that may grow 50 to 80 feet tall. The tree has 3- to 5-inch slender needles in clusters of 5. The needle clusters are deciduous. The bark is green with some lighter patches in young trees.
N
Thuja occidentalis
American arborvitae (also Northern white cedar)
American arborvitae (Thuja occidentalis) is a fast-growing evergreen hedge with feathery foliage. Emerald green arborvitae (Thuja occidentalis 'Smaragd') is a dense, columnar evergreen that is very popular for privacy hedges due to its consistent green color, natural thickness, and low-maintenance habit.
N
Thuja occidentalis - Techny
Techny American arborvitae
Techny is a compact, broad-based, upright, conical-pyramidal, dwarf cultivar that typically matures to 10 to 15 feet tall. It is noted for its rich dark green foliage that does not yellow in winter. Foliage is scale-like and appears in flat, fan-shaped clusters.
Tsuga canadensis
Canadian hemlock
Features soft, feathery deep green needles that form flat, horizontal sprays on the twigs. Yields an abundance of small brown cones 1/2 to 1 inch long that hang from the branches like ornaments. May be sheared to any height or shape.
N
Ornamental Trees - Under 30 Feet in Height at Maturity
Amelanchier x grandiflora 'Robin Hill'
Robin Hill apple serviceberry
White flowers in the spring and purple fruit in the fall, colorful fall foliage, bark and branches are attractive, neutral or acid soils preferred, low tolerance for compacted, poorly drained soils, medium tolerance to salt.
N, O, X
Cercis canadensis
Eastern redbud
Reddish purple buds open to rosy pink before leaves appear, picturesque small tree, approx. 20 feet at age 30, neutral or acid soils preferred, look for Columbus, WI, strain to assure hardiness.
O
Crataegus viridis 'Winter King'
Winter King hawthorn
White flowers, red fruit, attractive fall foliage, crown width at maturity will be equal to or greater than the height.
N, O
Malus spp.
Flowering crabapple.
The most common problems include apple scab, fireblight, cedar apple rust, frog-eye leaf spot, eastern tent caterpillar, spider mites, Japanese beetles, gypsy moth, prone to basal suckers and watersprouts, poor form, fruit mess, rabbit or vole injury susceptible. Select disease-resistant cultivars.
O
Syringa reticulata 'Ivory Silk'
Ivory Silk Japanese tree lilac
White flowers in the spring, bark and branches are attractive, neutral or acid soils preferred, low tolerance for compacted, poorly drained soils, medium tolerance to salt.
O
Ornamental Trees - 30 to 35 Feet in Height at Maturity
Betula nigra 'Heritage'
River birch
Native; tree form: grows rapidly when established; salmon-white peeling bark; leaves are glossy dark green; briefly yellow in fall; susceptible to leaf miner and chlorosis (yellowing of leaves) if pH is too high; prefers moist but well drained acid soils.
O, X
Pyrus calleryana 'Autumn Blaze' 'Chanticleer'
Autumn Blaze callery pear
White flowers in spring, attractive fall foliage.
O
Ornamental Trees - Over 45 Feet in Height at Maturity
Ginkgo biloba 'Autumn Gold' or 'Princeton Sentry'
Ginkgo, male cultivars
Variable and irregular, large spreading branches; slow growth for about 15 years, then medium; tolerates wide range of soils, salt and pollutants; very disease-resistant and low maintenance; partial to full sun: colorful autumn foliage, leaves are distinctive.
Oamerican filbert
Tall Shrubs
Amelanchier spp.
Serviceberry, juneberry or salmonberry
Upright, clump or bush form. Partial shade, alkaline soil, white flowers in spring, edible purple fruits in fall. Smooth gray bark; yellow to orange fall foliage.
O
Cornus racemosa
Gray dogwood
Erect small tree. Dry or wet soil, prefer shade; woods edges. White flowers, purple fruits (birds like them), purple fall foliage.
O
Cornus stolonifera
Red osier dogwood
Spreading bush form. Wet, moist soil; tolerates poor drainage. White flowers, white fruits, red twigs.
O
Cornus stolonifera
Common witchhazel
Spreading bush form. Prefers shade. Yellow flowers in October; yellow fall foliage.
N, O
Euonymus atropurpurea
Eastern wahoo
N
Physocarpus opulifolius
Common (or Eastern) ninebark
Vase-shaped bush form. Prefers dry soil in partial shade. White flowers, red capsular fruits; shredded bark.
N, O
Viburnum dentatum
Arrowwood viburnum
Vase-shaped shrub. Prefers moist soil and shade. White flowers in June, blue fruits and maroon fall foliage.
O
Viburnum lentago
Nannyberry viburnum
N
Viburnum trilobum
American cranberrybush viburnum
Upright shrub that prefers moist soil. Lacy appearance, white flowers and persistent, edible red fruits.
O
Medium Deciduous Shrubs
Aronia arbutifolia
Red Chokeberry
Red chokeberry is a tall, multi-stemmed native shrub with abundant white flowers, red glossy berries, and outstanding red fall color.
O
Corylus americana
American filbert (also American hazelnut)
American hazelnut is a thicket-forming, spreading shrub to 10 feet high, the leaves can be very colorful in autumn, varying from orange to brick red or purplish red, or with combinations of rose, orange, yellow, and pale green.
N, O
Ilex verticillata
Winterberry
This slow-growing, multi-stemmed shrub typically develops an upright to rounded habit and grows between 5 and 15 feet tall. The leaves are typically two to three inches long, elliptic, toothed, and dark green. In the fall, the foliage turns yellow or, in some cases, maroon. The berries provide significant color and interest in the winter landscape.
N, O
Viburnum cassinoides
Witherod viburnum
Witherod viburnum grows to 5 to 6 feet in height and is typically found in wetter conditions such as swamps and marshes, moist fields, and woods. This native North American shrub offers visual interest during all four seasons with white flowers in the spring, beautiful red-orange leaves in the fall, and fruit that changes colors as it matures throughout the growing season.
N, O
Medium Evergreen Shrubs
Juniper chinensis 'Pfitzerana'
Pfitzer Juniper (also Golden Pfitzer)
Golden Pfitzer Juniper is a fast-growing evergreen conifer shrub that can reach 3 to 5 feet in height with a width of 10 feet or more. It has main branches which emerge at a 45° angle to the ground. Branch tips often droop.
O
Junipers communis depressa
Oldfield Common Juniper
Oldfield Common Juniper is a Wisconsin native ground cover evergreen. It's a cold-hardy, shrubby evergreen which inhabits the sandy hills of the Kettle Moraine and the clay bluffs along Lake Michigan.
N
Thuja occidentalis 'Woodwardii'
Woodward Globe Arborvitae
Woodward globe arborvitae is a compact to medium-sized shrub that naturally maintains its broadly rounded shape. The fine-textured, lacy foliage is a rich green, turning shades of green and brown in winter.
Low Deciduous Shrubs
Amelanchier stolonifera
Running Serviceberry
Serviceberry is a small deciduous tree or shrub with attractive white spring blossoms, that provides year-round interest in the landscape, as well as producing edible fruits.
N
Aronia melanocarpa
Black Chokeberry
Black chokeberry is a multi-stemmed, deciduous, eastern North American shrub which reaches 4 to 8 feet in height. Its ornamental attributes include three seasons of interest: white flowers in spring, lustrous green foliage in summer and black fruits in late summer, and bright yellow-orange-red foliage in autumn.
N, O
Juniper horizontalis
Creeping Juniper
Creeping juniper is a ground-hugging shrub native to North America that is often used as ground cover in gardens and landscapes.
N
Ribes alpinum
Alpine Currant
Alpine currant is a hardy, low-mounded shrub commonly used as a hedge. Plants are tolerant of full sun to full shade. Very low-maintenance with little ornamental appeal other than its dense green foliage.
Viburnum acerifolium
Mapleleaf Viburnum
Maple-leaf arrowwood is a low, densely branched shrub, 4 to 6 feet tall and 3 to 4 feet wide. Flat-topped clusters of white flowers are followed by berries turning from red to blue-black. Bright- to dark-green, deciduous foliage, maple-like in shape, is very colorful in fall. A shrub with maple-like leaves and small, white flowers or uniform size in flat-topped clusters.
N
Viburnum opulus 'Nanum'
Dwarf European Cranberrybush
A dense, rigidly upright-growing small shrub with good fall color; does not have the flowers or fruit of the species; hardy and adaptable; makes an excellent low hedge or garden background shrub, excellent in groupings
Codes:
N - Species native to Wisconsin
O - Also an ornamental
X - Not permissible as street tree

§ 315-177 Prohibited landscape species.

A. 
The following species are prohibited for use in all landscaping plans in the Village of Denmark.
(1) 
Trees.
(a) 
Amur maple: non-native; invades open grasslands, prairies and forests; outcompetes native vegetation, reducing overall biodiversity.
(b) 
Ash: emerald ash borers.
(c) 
Black locust: invade forests, prairies, old fields and roadsides; vegetative reproduction forms groves of clones excluding native vegetation; vigorous sprouting, root suckering and lateral spread caused by damage to roots or stems, making it difficult to control.
(d) 
Box elder: weak wood and branch attachments are subject to storm damage; trees can be high maintenance due to drooping branches and poor growth form; attract box elder bugs, which can be a nuisance.
(e) 
Callery pear, Bradford: This cultivar of callery pear should be avoided due to poor branching structure. The narrow crotches make this tree susceptible to storm damage.
(f) 
Cottonwood: susceptible to storm damage due to shallow root system and weak wood and branch attachments; female cottonwoods produce large numbers of cottony seeds which litter the landscape.
(g) 
Gingko, female: fruit has pungent odor.
(h) 
Macho corktree: non-native; allelopathic, exuding chemicals from the roots which impact soil microorganisms and surrounding vegetation; tolerates a wide variety of site and soil conditions; prolific seed producers and stump sprouters.
(i) 
Norway maple: non-native, has escaped urban environment and now poses a threat to native maple species; aggressive roots frequently result in self-girdling; shallow, fibrous root system prevents grass from growing under the tree and is susceptible to being blown over in windy, wet environments.
(j) 
Poplar or aspen: Poplar/aspen trees are subject to canker and prone to branch failure in cold snowy climates like Wisconsin; trees are very short lived and have a poor growth form.
(k) 
Red oak: oak wilt.
(l) 
Siberian elm: non-native; tolerates a wide variety of growing/site conditions; seeds develop and germinate quickly allowing dense stands to form rapidly and outcompete native vegetation; reduces forage for native fauna.
(m) 
Silver maple: subject to branch breakage following ice storms; aggressive roots can clog drains and buckle sidewalks; susceptible to wood and root decay; trees can be high maintenance due to poor growth form.
(n) 
Willows: Willow trees are extremely fast-growing and quickly expand beyond their growing space; roots can interfere with water and sewer lines; weak wood is subject to storm damage and branch failure in high winds and heavy snow loads.
(2) 
Shrubs.
(a) 
Autumn olive: non-native, introduced from Asia; invades open and forested areas; produces numerous fruits in high light conditions; alters nutrient cycling by adding nitrogen to the soil.
(b) 
Buckthorn - common, glossy: non-native; tolerate a wide variety of site conditions; leaf-out early and retain leaves late into season allowing for a longer growing season than native vegetation; shades out regeneration of native tree and shrub species; can quickly take over the understory of woodlots.
(c) 
Burning bush: non-native, introduced from Asia in the 1860s as an ornamental; tolerates a wide variety of site and soil conditions; produces large amounts of seed; nonpalatable to deer, giving it a competitive advantage over native vegetation.
(d) 
Honeysuckle: non-native species include Japanese honeysuckle, Morrow's honeysuckle, Tatarian honeysuckle, Bell's honeysuckle and Amur honeysuckle; outcompete native vegetation; will take over prairies, forests, fields and roadsides.
(e) 
Japanese barberry: non-native ornamental; tolerates a wide variety of site and environmental conditions; spines deter deer browse, giving it an advantage over native vegetation; spreading horizontal branches will root freely when they touch the ground leading to dense thickets; research has shown higher rates of Lyme-disease carrying ticks in forests infested with this plant.
(f) 
Multiflora rose: non-native; produces up to 500,000 seeds per year that remain viable in the soil for 10 to 20 years; tolerates a wide variety of site conditions; can form dense thickets that exclude native vegetation.
(g) 
Russian olive: non-native; invades open areas, including wet areas; can dry up riparian areas as it uses more water than native species; alters nutrient cycling by adding nitrogen to the soil.
(h) 
Smooth sumac: Sumac growth can block rain and sunlight and begin to change the ecosystem's soil chemistry, temperature, and light levels. This can cause existing plants and small shrubs in the area to wither. By blocking the sunlight, sumac trees may also prevent new plants and vegetation from growing.
(i) 
White mulberry: Produces abundant pollen debris which may cause allergic reactions in some people.
(3) 
Vines.
(a) 
American bittersweet.
(b) 
Oriental bittersweet.
(4) 
Ground covers.
(a) 
Birdsfoot trefoil.
(b) 
Crown vetch.
(5) 
Flowers.
(a) 
Dames rocket.
(b) 
Multiflora rose.
(c) 
Purple loosestrife.
(d) 
Yellow iris.
(6) 
Grasses.
(a) 
Maiden grass.
(b) 
Reed canary grass.
(7) 
Aquatic.
(a) 
Flowering rush.
(b) 
Water hyacinth.
(c) 
Water lettuce.
(d) 
Yellow floating heart.

§ 315-178 Preservation of landscaping.

A. 
Maintenance. All landscaped areas shall be maintained and preserved in accordance with the approved landscape plan.
B. 
Responsibility for maintenance.
(1) 
Maintenance of all landscaping shall be the responsibility of the owner, lessee, heirs, assigns, agents, homeowners' association, or other liable entity of the property.
(2) 
The owner or liable entity in control of any private premises shall at all times maintain the premises free of litter and weeds.
C. 
Plant replacement. Any plant materials included in an approved landscaping plan that do not survive a plant establishment period of two years after installation shall be replaced with plant material(s) of the same or like species of equal size within the next planting season, but in any event, within six months of the plant's demise.