8
This Front Range Tree Recommendation List © was developed through the collaborative efforts of 12 individuals, three from each of the four participating professional groups: the American Society of Landscape Architects(ASLA), the Col- orado Nursery & Greenhouse Association (CNGA), municipal arborists representing the Colorado Tree Coalition (CTC), and the Colorado State University (CSU) Extension. Based on the committee’s collective education, knowledge, and experience over 250 trees or varieties were evaluated and rated, resulting in a single reference list for professionals to use and share with their customers or residents. The purpose of this project was to create a Front Range tree list for use by Green Industry professionals based on decades of actual experience growing and caring for trees in our area. This list is intended to assist those involved in the buying, growing, selling, selection, siting, and specification of trees, with the ultimate goal of a healthy, diverse, and geographically appropriate landscape and urban forest. The ratings apply to the Colorado Front Range, generally defined as the region from Colorado Springs to the Wyoming border and from the foothills to the eastern plains. We encourage industry profes- sionals to prepare similar lists for other geographic regions using this as a template. The initial list of evaluated trees was based on a compilation of six 2010 Front Range Nursery catalogs plus recommenda- tions from committee members. The group evaluated each tree based upon 5 Critical and 8 Cautionary Cultural Factors, result- ing in one of four ratings: A - Generally Recommended. A tree is Generally Recommended if it has consistently displayed no serious vitality issues related to any of the five Critical factors. B - Conditionally Recommended. A tree is Conditionally Rec- ommended if it has consistently displayed serious vitality issues related to one or more of the five Critical factors. Some cultural factors such as sun scald can be mitigated thru proper horticul- tural care, in this case using tree wrap. C - Potential/Unproven. A tree is listed as Potential/Unproven if it is offered for sale locally and has the potential to do well here (a USDA Hardiness Zone Rating of 5 or below), but the committee has less than ten years of experience growing and maintaining a significant population of the tree in our area. As this list is periodically updated, the intention is to move trees with a C rating to one of the other categories based upon the collective experience of the list users. D - Not Recommended. A tree is Not Recommended if it has consistently displayed overwhelming vitality issues related to one or more of the five Critical factors or can be expected to do poorly under normal circumstances. When using this list to assist in tree selection for a specific planting location, a site analysis relating to the cultural factors, including a soil test to determine pH, texture, and composition should be performed. We assume the list users are aware of the physical attributes of these trees (mature size, fall color, growth habit, texture, flowers, fruit, etc) or have access to this information. The Front Range Tree Recommendation List © is downloadable on the websites of the CNGA, ASLA, CTC, and CSU Extension. This hardcopy document was paid for with contributions from the GreenCO Foundation and the Colorado Nursery Research and Education Foundation (CNREF). If you are interested in participating in future updates of this list, please provide your contact information on the CNGA website, coloradonga.org. Click on Resources and Tree List. COMMITTEE MEMBERS Landscape Architects - ASLA: Gail Barry; David Flaig; Don Godi Nurserymen - CNGA: Stan Brown; Matt Edmundson; Gary Epstein CSU Representatives: Robert Cox; Jim Klett, PhD; Alison O’Connor Municipal Arborists - CTC: Tim Buchanan, Fort Collins; Scott Grimes, South Suburban Parks; Michael Swanson, Denver Front Range Tree Recommendation List © Copyright 2010 Colorado Nursery & Greenhouse Association

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Page 1: Front Range Tree Recommendation List - Extensionextension.colostate.edu/docs/pubs/garden/treereclist.pdf ·  · 2014-03-10This Front Range Tree Recommendation List ... Freeman -

This Front Range Tree Recommendation List© was developed through the collaborative efforts of 12 individuals, three from each of the four participating professional groups: the American Society of Landscape Architects(ASLA), the Col-orado Nursery & Greenhouse Association (CNGA), municipal arborists representing the Colorado Tree Coalition (CTC), and the Colorado State University (CSU) Extension. Based on the committee’s collective education, knowledge, and experience over 250 trees or varieties were evaluated and rated, resulting in a single reference list for professionals to use and share with their customers or residents.

The purpose of this project was to create a Front Range tree list for use by Green Industry professionals based on decades of actual experience growing and caring for trees in our area. This list is intended to assist those involved in the buying, growing, selling, selection, siting, and specifi cation of trees, with the ultimate goal of a healthy, diverse, and geographically appropriate landscape and urban forest. The ratings apply to the Colorado Front Range, generally defi ned as the region from Colorado Springs to the Wyoming border and from the foothills to the eastern plains. We encourage industry profes-sionals to prepare similar lists for other geographic regions using this as a template.

The initial list of evaluated trees was based on a compilation of six 2010 Front Range Nursery catalogs plus recommenda-tions from committee members. The group evaluated each tree based upon 5 Critical and 8 Cautionary Cultural Factors, result-ing in one of four ratings:

A - Generally Recommended.A tree is Generally Recommended if it has consistently displayed no serious vitality issues related to any of the fi ve Critical factors. B - Conditionally Recommended. A tree is Conditionally Rec-ommended if it has consistently displayed serious vitality issues related to one or more of the fi ve Critical factors. Some cultural factors such as sun scald can be mitigated thru proper horticul-tural care, in this case using tree wrap.C - Potential/Unproven. A tree is listed as Potential/Unproven if it is offered for sale locally and has the potential to do well here (a USDA Hardiness Zone Rating of 5 or below), but the committee has less than ten years of experience growing and maintaining a signifi cant population of the tree in our area. As this list is periodically updated, the intention is to move trees with a C rating to one of the other categories based upon the collective experience of the list users.D - Not Recommended. A tree is Not Recommended if it has consistently displayed overwhelming vitality issues related to one or more of the fi ve Critical factors or can be expected to do poorly under normal circumstances.

When using this list to assist in tree selection for a specifi c planting location, a site analysis relating to the cultural factors, including a soil test to determine pH, texture, and composition should be performed. We assume the list users are aware of

the physical attributes of these trees (mature size, fall color, growth habit, texture, fl owers, fruit, etc) or have access to this information.

The Front Range Tree Recommendation List© is downloadable on the websites of the CNGA, ASLA, CTC, and CSU Extension. This hardcopy document was paid for with contributions from the GreenCO Foundation and the Colorado Nursery Research and Education Foundation (CNREF). If you are interested in participating in future updates of this list, please provide your contact information on the CNGA website, coloradonga.org. Click on Resources and Tree List.

COMMITTEE MEMBERSLandscape Architects - ASLA: Gail Barry; David Flaig; Don GodiNurserymen - CNGA: Stan Brown; Matt Edmundson; Gary EpsteinCSU Representatives: Robert Cox; Jim Klett, PhD; Alison O’ConnorMunicipal Arborists - CTC: Tim Buchanan, Fort Collins; Scott Grimes, South Suburban Parks; Michael Swanson, Denver

Front Range TreeFront Range TreeFront Range TreeRecommendation List ©

Copyright 2010 Colorado Nursery & Greenhouse Association

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CRITICAL: SC=Soil Chemistry • ST=Soil Texture • ID=Insects & Diseases • CH= Cold Hardiness • SA=Salt ToleranceCAUTIONARY: TS=Tree Wrap/Sun Scald • WW=Weak Wood • SL=Short Lived • SU=Suckers • RS= Re-seeds • TR=Transplants • LS=Leaf Scorch • EX=Exposure OTHER: WN= Water Needs • LA= Limited AvailabilityKE

YDECIDUOUS ALPHA-BOTANICBotanical Name Variety or Common Name Rating Cultural Factors

SC ST ID CH SA TS WW SL SU RS TR LS EX WN LAAcer MapleAcer campestre Hedge B x l-m x

Acer x freemanii

Freeman - 'Armstrong', Autumn Blaze®, Autumn Fantasy®, Celebration®, Sienna Glen® B x x x m

Acer ginnala Amur/ Ginnala - 'Flame' B x x x l-mAcer glabrum Rocky Mountain B x m-hAcer grandidentatum Big Tooth A l-m xAcer grandidentatum Big Tooth - Manzano™ C x l-m xAcer griseum Paperbark C x x x m xAcer miyabei Miyabe C x x l-m xAcer negundo Boxelder/ Ash-leaved - 'Sensation' C x l-m xAcer palmatum Japanese B x x x x x m-h

Acer platanoides

Norway - 'Columnare', 'Crimson King', 'Crimson Sentry', 'Deborah', Emerald Lustre®, 'Emerald Queen', Fairview®, 'Royal Red' B x x m

Acer pseudosieboldianum Korean/Purplebloom C x x m xAcer rubrum Red - Autumn Flame® B x x x mAcer rubrum Red - Burgundy Belle® C x x x m xAcer rubrum Red - Northwood® B x x x mAcer rubrum Red - October Glory® B x x x mAcer rubrum Red - Redpointe® C x x x m xAcer rubrum Red - Red Sunset® B x x x mAcer saccharinum Silver - 'Silver Queen' B x x x x mAcer saccharinum Silver - 'Skinner' B x x x x m xAcer saccharum Sugar - Green Mountain® B x x x x mAcer saccharum Sugar - Legacy® B x x x x m x

Acer saccharum Sugar - Caddo 'John Pair', 'Autumn Splendor' C x x x l-m x

Acer tataricum Tartarian A x l-m xAcer tataricum Tatarian -Hot Wings® A x l-mAcer tataricum Tatarian - Pattern Perfect™ A x l-mAcer truncatum x platanoides Norwegian Sunset® C x l-m xAesculus Buckeye/HorsechestnutAesculus arguta Texas A l-m xAesculus glabra Ohio A x m xAesculus hippocastanum Common Horsechestnut A x m xAesculus octandra(flava) Yellow C x m xAesculus x carnea 'Briotti' C x m xAesculus x carnea 'Fort McNair' C x mAlnus AlderAlnus glutinosa Common /Black B x x m-hAlnus tenuifolia Thinleaf/ Mountain A x x m-hAmelanchier ServiceberryAmelanchier alnifolia Saskatoon A x l-m

Critical Cautionary OtherPlant Nomenclature from Manual of Woody Landscape Plants by Michael A. Dirr 2009 edition.

Deciduous Alpha-Botanic

Comments:

Variable hardiness from seed; prone to winter dieback in hard early freezes

Develops chlorosis in alkaline soilsCan develop chlorosis in alkaline soilsPrefers more moisture

More tree-like than Acer grandidentatumNeeds a protected site; does not transplant well when bare rootedTypically budded to A.campestre that shows variable hardiness from seedTolerant of alkaline soils; holds a strong dominate leader; male tree so no boxelder bugsPrefers well drained soils low in salt content with some protection

Acer platanoides is prone to sunscald and leaf scorch in hot dry sitesMore tolerant of heavy soils than Acer palmatum , but still needs protectionChlorosis; Acer rubrum needs an acidic soilDevelops chlorosis in alkaline soilsDevelops chlorosis in alkaline soilsDevelops chlorosis in alkaline soilsDevelops chlorosis in alkaline soilsDevelops chlorosis in alkaline soilsDevelops chlorosis in alkaline soilsDevelops chlorosis in alkaline soilsAcer saccharum prefers well drained, neutral to acidic soilsCan develop chlorosis in alkaline soils

Alkaline tolerant; needs protected site

Prone to winter dieback in early hard freezes & possible death at -30°

More heat tolerant than A.glabraSome chlorosis; prone to leaf scorch in hot dry sites

Leaf miner; leaf scorch in hot dry sitesLeaf miner; leaf scorch in hot dry sites

Best used as multi-stem

2

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DECIDUOUS ALPHA-BOTANIC

CRITICAL: SC=Soil Chemistry • ST=Soil Texture • ID=Insects & Diseases • CH= Cold Hardiness • SA=Salt ToleranceCAUTIONARY: TS=Tree Wrap/Sun Scald • WW=Weak Wood • SL=Short Lived • SU=Suckers • RS= Re-seeds • TR=Transplants • LS=Leaf Scorch • EX=Exposure OTHER: WN= Water Needs • LA= Limited AvailabilityKE

YBotanical Name Variety or Common Name Rating Cultural Factors

SC ST ID CH SA TS WW SL SU RS TR LS EX WN LACritical Cautionary Other

Plant Nomenclature from Manual of Woody Landscape Plants by Michael A. Dirr 2009 edition.

Amelanchier canadensis Shadblow A x l-m x

Amelanchier laevis Allegheny -'Snowcloud', Spring Flurry® C x m xAmelanchier lamarckii Lamarck C x m x

Amelanchier x grandifloraAutumn Brilliance®, 'Princess Diana', 'Robin Hill' B x x m

Betula BirchBetula nigra River - Heritage® B x x x m-hBetula occidentalis Rocky Mountain/ Water B x m-hBetula papyrifera Paper B x m-hBetula pendula European White - 'Gracilis' B x m-hBetula platyphylla Asian White - 'Whitespire' B x x m-hCarpinus HornbeamCarpinus betulus European - 'Frans Fontaine' C x x mCarpinus betulus 'Fastigiata' ('Pyramidalis') B x x m xCatalpa CatalpaCatalpa ovata Chinese A x l-m xCatalpa speciosa Northern/ Western A x l-mCeltis occidentalis Common A x l-mCercis RedbudCercis canadensis Eastern A x x

m;m-h

Cercis canadensis Eastern - 'Alba' C x x m xCercis canadensis Eastern - 'Forest Pansy' B x x x m xCercis canadensis Eastern -Lavender Twist™ C x x mCladrastis kentukea American Yellowwood C x x m xCornus DogwoodCornus controversa Giant - 'June Snow' C m xCornus mas Cornelian Cherry A m xCorylus colurna Turkish Filbert/Hazelnut C x l-m xCrataegus HawthornCrataegus crusgalli Cockspur var. inermis A l-mCrataegus ambigua Russian A lCrataegus douglasii River/Douglas B x m x

Crataegus laevigata English - 'Crimson Cloud', 'Pauls Scarlet' B x m xCrataegus mollis Downy B x l-m xCrataegus x mordenensis 'Toba' B x x mCrataegus phaenopyrum Washington A mCrataegus viridis Green - 'Winter King' A l-mCrataegus x lavallei Lavalle C m x

Fagus sylvatica European Beech - 'Roseomarginata', 'Tricolor' B x x m x

Fraxinus AshFraxinus americana White - Autumn Purple® D x x mFraxinus americana White - 'Empire' D x x m xFraxinus mandshurica Manchurian - 'Mancana' D x m x

Deciduous Alpha-Botanic

3

Comments:

Best used as multi-stem

Best used as multi-stemBest used as multi-stemPrefers acid soil; develops chlorosis in alkaline soils; prone to basal suckering; best used as multi-stem shrub.

Develops chlorosis in alkaline soils and bronze birch borerBronze birch borerBronze birch borerBronze birch borerBronze birch borer

Needs protected siteNeeds protected site

Northern seed source

Time will tellBest used as multi-stem

FireblightRust

Best in well drained soils

EAB-found in Boulder in 2013. Spread to other areas is unknown at this time.EAB-found in Boulder in 2013. Spread to other areas is unknown at this timeEAB-found in Boulder in 2013. Spread to other areas is unknown at this time

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CRITICAL: SC=Soil Chemistry • ST=Soil Texture • ID=Insects & Diseases • CH= Cold Hardiness • SA=Salt ToleranceCAUTIONARY: TS=Tree Wrap/Sun Scald • WW=Weak Wood • SL=Short Lived • SU=Suckers • RS= Re-seeds • TR=Transplants • LS=Leaf Scorch • EX=Exposure OTHER: WN= Water Needs • LA= Limited AvailabilityKE

YDECIDUOUS ALPHA-BOTANICBotanical Name Variety or Common Name Rating Cultural Factors

SC ST ID CH SA TS WW SL SU RS TR LS EX WN LACritical Cautionary Other

Plant Nomenclature from Manual of Woody Landscape Plants by Michael A. Dirr 2009 edition.

Fraxinus nigra Black - 'Fallgold' D x x mFraxinus pennsylvanica Green - 'Bergeson' D x m xFraxinus pennsylvanica Green -Cimmaron® D x m xFraxinus pennsylvanica Green - Dakota Centennial™ D x m xFraxinus pennsylvanica Green -'Marshall's Seedless' D x l-mFraxinus pennsylvanica Green - 'Patmore' D x l-mFraxinus pennsylvanica Green - Prairie Spire® D x l-m xFraxinus pennsylvanica Green - 'Summit' D x l-mGinkgo biloba Ginkgo/ Maidenhair Tree B x x m xGleditsia HoneylocustGleditsia triacanthos v. inermis Thornless Common -Halka™ B x l-m x

Gleditsia triacanthos v. inermisThornless Common - Imperial®, Shademaster®, Skyline® A x l-m

Gleditsia triacanthos v. inermis Thornless Common - Sunburst® B x x x l-mGymnocladus Kentucky CoffeetreeGymnocladus dioicus Kentucky Coffeetree A l-mGymnocladus dioicus Kentucky Coffeetree - 'Espresso' C l-m xHeptacodium miconioides Seven-Son Flower C x m x

Hibiscus syriacus

Rose-of-Sharon - 'Aphrodite','Ardens','Coelistis', 'Lucy','Red Heart','Woodbridge' C m x

Juglans nigra Black Walnut D x l xKoelreuteria paniculata Panicled Goldenraintree B x x lLiquidambar styraciflua American Sweetgum C x x m xLiriodendron tulipifera Tuliptree C x m xMaackia amurensis Amur Maackia C l-m xMagnoliaMagnolia acuminata Cucumbertree C m xMagnolia x 'Galaxy' Galaxy C x m xMagnolia x soulangiana Saucer A x mMalus AppleMalus 'Gala' Gala B x mMalus 'Granny Smith' Granny Smith D x x x m xMalus 'Haralred' Haralred B x mMalus 'Honeycrisp' HoneyCrisp C m xMalus 'Jonathan' Jonathan B x mMalus 'Liberty' Liberty C mMalus 'McIntosh' McIntosh B x mMalus 'Red Delicious' Red Delicious A mMalus 'Royal Gala' Royal Gala B x mMalus 'Sweet Sixteen' Sweet Sixteen C mMalus 'Yellow Delicious' Yellow Golden Delicious A mMalus 'Zestar' Zestar C m xMalus CrabappleMalus 'Adams' Adams A l-m xMalus x 'Branzam' Brandywine® B x l-m

Deciduous Alpha-Botanic

Comments:

EAB-found in Boulder in 2013. Spread to other areas is unknown at this time.EAB-found in Boulder in 2013. Spread to other areas is unknown at this time.EAB-found in Boulder in 2013. Spread to other areas is unknown at this time.EAB-found in Boulder in 2013. Spread to other areas is unknown at this time.EAB-found in Boulder in 2013. Spread to other areas is unknown at this time.EAB-found in Boulder in 2013. Spread to other areas is unknown at this time.EAB-found in Boulder in 2013. Spread to other areas is unknown at this time.EAB-found in Boulder in 2013. Spread to other areas is unknown at this time.

Wrap young tree

Wrap young treeWrap young tree

Thousand cankers disease

Needs a well drained soil

Not reliable fruit producer, fireblight Considered zone 6, fireblightGood northern apple, subject to codling mothSubject to codling mothFireblight, subject to codling mothSubject to codling mothFireblight, subject to codling mothSubject to codling mothFireblight, subject to codling mothNorthern selection, subject to codling moth Subject to codling mothSubject to codling moth

Large messy fruits, fireblight

4

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DECIDUOUS ALPHA-BOTANIC

CRITICAL: SC=Soil Chemistry • ST=Soil Texture • ID=Insects & Diseases • CH= Cold Hardiness • SA=Salt ToleranceCAUTIONARY: TS=Tree Wrap/Sun Scald • WW=Weak Wood • SL=Short Lived • SU=Suckers • RS= Re-seeds • TR=Transplants • LS=Leaf Scorch • EX=Exposure OTHER: WN= Water Needs • LA= Limited AvailabilityKE

YBotanical Name Variety or Common Name Rating Cultural Factors

SC ST ID CH SA TS WW SL SU RS TR LS EX WN LACritical Cautionary Other

Plant Nomenclature from Manual of Woody Landscape Plants by Michael A. Dirr 2009 edition.

Malus x 'Centzam' Centurion® A l-mMalus x 'Coralcole' Coralburst™ A l-mMalus 'David' David A l-m xMalus 'Dolgo' Dolgo B x l-m xMalus x 'Schmidtcutleaf' Golden Raindrops® D x l-m xMalus 'Hopa' Hopa B x l-m xMalus 'Indian Magic' Indian Magic A x l-mMalus 'Indian Summer' Indian Summer A l-mMalus ioensis Bechtel 'Plena' D x l-m xMalus 'Prairiefire' Prairiefire B x l-mMalus ' Prairie Rose' Prairie Rose C l-m xMalus ' Profusion', 'Radiant' Profusion, Radiant A l-mMalus 'Red Barron' Red Barron C l-m xMalus 'Red Jade', 'Royalty' Red Jade, Royalty D x l-m xMalus 'Robinson', 'Royal Raindrops' Robinson, Royal Raindrops C l-m xMalus sargentii Sargent A x l-mMalus sargentii 'Tina' Sargent Tina C l-mMalus 'Spring Snow' Spring Snow A x l-mMalus 'Thunderchild' Thunderchild A l-mMalus 'Velvetcole' Velvet Pillar™ C l-m xMorus alba White - 'Chaparral' B x x mPhellodendron amurense Amur corktree C m xPlatanus x acerifolia London Planetree -'Bloodgood' C x x x m-hPopulus Poplar (cottonwood)Populus angustifolia Narrowleaf B x x x x l-mPopulus deltoides Eastern B x x x x m-hPopulus sargentii Plains A x m-hPopulus sargentii Sargent, Straight Plains 'Jeronimus' A mPopulus tremula 'Erecta' Upright European, Aspen B x x x mPopulus tremuloides Quaking Aspen B x x x mPopulus x acuminata Lanceleaf A x x mPopulus x acuminata x sargentii Highland B x x x m Populus x canescens 'Tower" Tower D x x x m xPrunus ApricotPrunus armeniaca Chinese A x m xPrunus armeniaca 'Moongold', 'Moorpark' A m xPrunus Plum, CherryPrunus avium 'Bali' Bali C mPrunus avium 'Bing' Bing B x x m xPrunus avium 'Stella Compact' Stella Compact B x x m xPrunus cerasifera Newport (Kankakee) B x x m Prunus cerasifera Newport (Minnesota) B x x m xPrunus cerasus Cherry -'Montmorency', 'North Star' A mPrunus 'Frankthrees' Cherry - Mt. Saint Helens® B x x x x m Prunus maackii Amur Chokecherry B x x m xPrunus 'Mount Royal' Cherry -Mount Royal A m

Deciduous Alpha-Botanic

Comments:

Disease resistantDisease resistant

Messy fruit; fireblightSome fireblight Some fireblight, messy fruitPoor structure

Fireblight Fireblight

FireblightFireblight

Some fireblight

Some dieback

Anthracnose

Vigorous suckering; forms colonies. Use in native areas only Too big for residential useToo big for residential useToo big for residential useUnique form; prone to many diseases and insects Better at high elevations, chlorosis at lower elevations, prone to many diseases & insects Too big for residential useToo big for residential useProne to many diseases and insects

Seldom sets fruit along the front rangeGreat fall color; seldom sets fruit along the front range

Semi- sweet cherrySeldom sets fruit along the front rangeSeldom sets fruit along the front rangeBorersBorers

Root diseases if too wetSelf fruitful plum

5

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CRITICAL: SC=Soil Chemistry • ST=Soil Texture • ID=Insects & Diseases • CH= Cold Hardiness • SA=Salt ToleranceCAUTIONARY: TS=Tree Wrap/Sun Scald • WW=Weak Wood • SL=Short Lived • SU=Suckers • RS= Re-seeds • TR=Transplants • LS=Leaf Scorch • EX=Exposure OTHER: WN= Water Needs • LA= Limited AvailabilityKE

YDECIDUOUS ALPHA-BOTANICBotanical Name Variety or Common Name Rating Cultural Factors

SC ST ID CH SA TS WW SL SU RS TR LS EX WN LACritical Cautionary Other

Plant Nomenclature from Manual of Woody Landscape Plants by Michael A. Dirr 2009 edition.

Prunus padus European Birdcherry A x x mPrunus padus European Birdcherry Summer Glow® A x m xPrunus persica 'Elberta', 'Polly' Peach - Elberta, Polly B x x mPrunus persica 'Reliance' Peach - Reliance B x x m xPrunus 'Santa Rosa' Plum - Santa Rosa A m Prunus 'Stanley' Plum - Stanley A mPrunus 'Superior' Plum - Superior A m xPrunus 'Toka' Plum - Toka A m x

Prunus virginianaCommon Chokecherry - 'Canada Red', 'Schubert' B x x x x l-m

Prunus x fontanesiana Plum - Des Fontaines C m xPtelea trifoliata Wafer ash, Hoptree A x x l-m xPyrus Pear

Pyrus Pear - 'Bartlett', 'Early Gold', 'Golden Spice', 'Luscious', 'Parker' B x l-m

Pyrus Pear - 'Summercrisp' B l-m xPyrus calleryana Callery - 'Bradford' D x x x l-m

Pyrus calleryanaCallery - 'Aristocrat', 'Chanticleer', 'Cleveland Select' A l-m

Pyrus calleryana Callery - 'Autumn Blaze' B x l-mPyrus calleryana Callery - 'Capital' A x l-mPyrus calleryana Callery - 'Redspire' A l-mPyrus ussuriensis Ussurian - 'Prairie Gem', 'Burgandy' B x l-m xPyrus ussuriensis Ussarian - 'Mt. Frost' B x l-m xQuercus OakQuercus alba White B x x x l-m xQuercus bicolor Swamp White B x x mQuercus buckleyi Texas Red C x l xQuercus ellipsoidalis Northern Pin C x m xQuercus gambelii Gambel A x l

Quercus macrocarpa Bur A l-m Quercus muehlenbergii Chinkapin A l-m xQuercus robur English A l-mQuercus robur English 'Columnaris' B x l-m Quercus robur English 'Skyrocket', 'Skymaster' C l-m xQuercus rubra Red B x mQuercus shumardii Shumard B x l-m Quercus undulata Wavyleaf A lQuercus alba x robur Crimson Spire® A l-mQuercus robur x bicolor Regal Prince® C l-m Robinia pseudoacacia Black Locust - 'Purple Robe' D x x x l-mSalix WillowSalix alba Niobe Weeping - 'Tristis' B x x hSalix alba Russian Golden - 'Vitellina' B x x h xSalix amygdaloides Peachleaf B x x l-m x

Deciduous Alpha-Botanic

Comments:

Some breakage after stormsSome breakage after storms; red leaf formSeldom sets fruit along the front rangeSeldom sets fruit along the front rangeNeeds a cross pollinatorSelf fruitful plumNeeds a cross pollinatorNeeds a cross pollinator

Tree form suckers, best as shrub Zone 3 ornamental cherry; long lived for a PrunusBest as a multi-stem

Fireblight

Fireblight

More cold hardy then P.calleryana , fireblight Fireblight

Develops chlorosis in alkaline soilsDevelops chlorosis in alkaline soilsMany seed sources not predictably hardyDevelops chlorosis in alkaline soils

From northern seed source

Develops chlorosis in alkaline soilsFrom a northern source

Highly susceptible to borer damage

Aphids and cankers Aphids and cankers Aphids and cankers

6

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DECIDUOUS ALPHA-BOTANIC

CRITICAL: SC=Soil Chemistry • ST=Soil Texture • ID=Insects & Diseases • CH= Cold Hardiness • SA=Salt ToleranceCAUTIONARY: TS=Tree Wrap/Sun Scald • WW=Weak Wood • SL=Short Lived • SU=Suckers • RS= Re-seeds • TR=Transplants • LS=Leaf Scorch • EX=Exposure OTHER: WN= Water Needs • LA= Limited AvailabilityKE

YComments:

Aphids and cankers Aphids and cankers

FireblightFireblight

Not tolerant of road saltsNot tolerant of road saltsNot tolerant of road salts

Not tolerant of road saltsNot tolerant of road salts

Some susceptibility to DED, scaleGood DED resistance, scale

Holds leaves lateHolds leaves lateNot best growth habit

Subject to early fall frostNarrower growth habit

Early frequent pruning needed when young

7

Botanical Name Variety or Common Name Rating Cultural Factors

SC ST ID CH SA TS WW SL SU RS TR LS EX WN LACritical Cautionary Other

Plant Nomenclature from Manual of Woody Landscape Plants by Michael A. Dirr 2009 edition.

Salix matsudana Globe - 'Navajo' D x x x h xSalix x 'Prairie Cascade' Prairie Cascade B x hSophora japonica Japanese Pagodatree B x x x x m xSorbus Mountain-ashSorbus intermedia Swedish Whitebeam C x m xSorbus aucuparia European B x x m xSorbus aucuparia European - Cardinal Royal® B x x m xSorbus x hybrida Oak Leaf C x m x

Syringa LilacSyringa pekinensis Peking - 'Summer Charm' C l-m xSyringa reticulata Japanese -'Ivory Silk' A l-mTilia LindenTilia americana American- 'Legend', 'American Sentry' A mTilia cordata Littleleaf - Greenspire® A mTilia tomentosa Silver - 'Sterling Silver' A m xTilia cordata x mongolica 'Harvest Gold' C m xTilia x flavescens 'Glenleven' A x mTilia x euchlora 'Redmond' A x mUlmus ElmUlmus americana American - 'Princeton' C x l-m xUlmus americana American - 'Valley Forge' 'Triumph' C l-mUlmus davidiana David C l-m xUlmus propinqua 'Emerald Sunshine' C l-m xUlmus wilsoniana 'Prospector' C l-m xUlmus japonica x U. pumila 'Vanguard' C l-m xUlmus japonica x U. wilsoniana 'Accolade' 'Triumph' C l-m xUlmus minor x U. parvifolia 'Frontier' C x l-m xUlmus 'Urban' x U. wilsoniana 'Patriot' C l-m xUlmus wilsoniana x U. pumila x U. minor 'Commendation' C l-m xXanthoceras sorbifolium Yellowhorn, Clear Creek® C l-m xZelkova serrata Japanese ZelkovaZelkova serrata 'Musashino' C x mZelkova serrata 'Green Vase' C x mZelkova serrata 'Village Green' C x m

Deciduous Alpha-Botanic

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Botanical Name Variety or Common Name Rating Cultural Factors

OtherSC CH ID ST SA TS WW SL SU RS TR LS EX WN LA

Abies concolor White Fir B x x x mCedrus libani Cedar of Lebanon C x m xJuniperus Juniper

Juniperus chinensis Chinese - 'Blue Point', 'Spartan', ‘Spearmint’ B x x x l-m

Juniperus chinensis Chinese - 'Hetzi Columnaris' A l-mJuniperus monosperma One-Seed A l xJuniperus osteosperma Utah A l xJuniperus scopulorum Rocky Mountain A l x

Juniperus scopulorum

Rocky Mountain - 'Welchii', 'Gray Gleam', ' Cologreen', 'Sky Rocket', 'Wichita Blue', 'Moonglow', 'Medora' A l

Juniperus virginiana Eastern Red Cedar - 'Hillspire', ‘Idyllwild,’ 'Blue Arrow', 'Taylor' A x l-m

Juniperus virginiana Eastern Red - 'Manhattan Blue' A x l-m xLarix decidua European Larch B m-hMetasequoia glyptostroboides Dawn Redwood C x x xPicea SprucePicea abies Norway - 'Cupressina' B x m-hPicea glauca Black Hills 'Densata' A m-h xPicea omorika Serbian B x x m-h xPicea pungens Colorado A x m-h

Picea pungens glauca

Colorado Blue - 'Baby Blue Eyes', 'Bakeri', 'Fastigiata', 'Fat Albert', Hoopsii, 'Colorado Weeping' ,'Sester's Dwarf' A x m-h

Pinus PinePinus aristata Bristlecone(foxtail) B x l-mPinus bungeana Lacebark C m-h xPinus cembra Swiss Stone Pine C x l-mPinus contorta Lodgepole B x l-m xPinus edulis Pinyon A x l-mPinus flexilis Limber A l-mPinus flexilis 'Vanderwolf's Pyramid' A l-mPinus heldreichii Bosnian var. leucodermis A x m x

Pinus heldreichii Bosnian var. leucodermis - 'Emerald Arrow', 'Iseli Fastigiata' C x m x

Pinus monophylla Singleleaf Pinyon C l xPinus mugo Mugo - ' Big Tuna','Tannenbaum' A l-mPinus nigra Austrian A mPinus nigra Austrian - 'Arnold's Sentinel' B mPinus ponderosa Ponderosa B x l-m

Critical CautionaryPlant Nomenclature from Manual of Woody Landscape Plants by Michael A. Dirr 2009 edition.

Evergreen Alpha-Botanic

Comments:

Needs more moisture; needs well drained soil; chlorosis

Needs a dry site.Needs a dry site.

Will not take windy sites

Will not take windy sites; needs a more protected area

Tussock moth in large trees

Possible IPS problem

Slow growing

Chlorosis at lower elevations; susceptible to Mountain Pine BeetlePitch borer, tip moth, Pine Beetle.

Some Zimmerman Pine Moth

Mountain Pine Beetle

EVERGREEN ALPHA-BOTANIC

CRITICAL: SC=Soil Chemistry • ST=Soil Texture • ID=Insects & Diseases • CH= Cold Hardiness • SA=Salt ToleranceCAUTIONARY: TS=Tree Wrap/Sun Scald • WW=Weak Wood • SL=Short Lived • SU=Suckers • RS= Re-seeds • TR=Transplants • LS=Leaf Scorch • EX=Exposure OTHER: WN= Water Needs • LA= Limited AvailabilityKE

Y8

Pinus strobus Eastern White B x x x mPinus strobiformis Southwestern White A l-mPinus sylvestris Scotch B x x m xSequoiadendron giganteum Giant Sequoia - 'Hazel Smith' C x x m-h xTaxodium distichum BaldcypressTaxodium distichum Baldcypress - 'Frio River' C x m-h x

Thuga occidentalisEastern Arborvitae - 'Emerald', 'Techny', 'Degroots Spire' B x m-h

Thuga standishii x Thuja plicata Green Giant B x m-h x

Develops chlorosis in alkaline soils; will not take windy sites

Mountain Pine Beetle

More protected areaMore protected area

x