right tree right site - university of maryland€¦ · right tree, right place december 12, 2013...

Right Tree, Right Place December 12, 2013

Edmund R. Gregan IICarlton Plants, LLC 1

Right Tree Right SiteRight Tree Right Place

Trees for todays streetsEdmund R. Gregan II

[email protected] 866 991-8308

Coastal Northeast Representative

Disasters, diseases, insects

and invasive plants

The battle between trees and utility lines…

A Major Problem



Books and articles

As horticulturists you should develop a list of proper trees and a set of criteria to ensure success in your communities.

Choosing trees for our community should be a balance between five major factors:

A list of trees which are commonly available… Environmental conditions… A design that works… Logical specifications… Inspections…

Lists should not be stagnant…

They should be constantly updated with new plants and plant innovations.



instance – a list of smaller wing trees could include:

Mostly trees that grow less than 35’ tall.

Naturally smaller growing genus and species

Selections - Dwarfed forms & Columnar Forms

Naturally occurring

Tree List Scientific Name Common Name



Tree List HeightOrigin

Tree List

Best suited for

a- Urbanb- Townsc- Suburban

Moisture

d- Tolerates dry soils

w- Tolerates wet soils

m- Moderate

Tree List

pH

Excellent

GoodModerate

Salt Tolerance

L- Tolerates a low pH

h- Tolerates a high pH

t- Tolerant/ adaptable

Poor



Tree ListNotes When specifying consider

Environmental Conditions

Area size – ground & vertical restrictions Soils – types, pH, etc Moisture – natural, irrigation Salt exposure Exposure/ Wind Insects and Diseases Vehicular & pedestrian traffic Utilities and other artificial structures Subsurface interferences

Best suited for: Urban



Best suited for: Suburban

Best suited for: Rural

Design



Design

Written Specifications - a list of general specs for all the trees.

Spread Sheet - specifications for each individual tree. Select your own trees

What makes up good street tree specifications?

Notes



When specifying consider

When inspecting…

Guarantee

Planting

NurseryDelivery

Tough as nails

Carpinus Celtis



Cornus mas

Hard to get right

Nyssa sylvatica

The short lived

Prunus

The somewhat “invasives”

Acer campestre

Acer tartaricum



The “Natives” and “Native Selections”

Amelanchier

The “Hybrids”

The ‘Rutgers Hybrid Dogwoods’

Aesculus x arnoldiana ‘Autumn Splendor’

“Dwarfs from Giants”

Zelkova serrata ‘Wireless’

Tilia cordata ‘Summer Sprite'



The “Much Maligned”

Crataegus

Malus

Gleditsia triacanthos var. inermis

Prunus serrulata 'Kwansan' Carpinus betulus 'Fastigiata'

Other tree forms

Tilia x europaea

Try to get out 3 days per month!

Attend a lecture … trade show Visit a Nursery …Garden Center … a garden

Right Tree, Right Place ‐ Recomended Smaller Trees for Connecticut Cities, Towns and Villages ‐ A CNLA List

Scientific name Common name Origin Ht (ft) Suited for Moisture pH Salt tolerance Notes When specifying consider

Acer buergerianum Trident Maple NE Asia 20‐30' suburban d‐tolerates dry Better in low pH Good Tough wood; hard to find in trade. Tolerant of urban conditions.

Straight central leader, higher limbs.

Acer buergerianum 'Streetwise' Streetwise Trident Maple Asia/ USA intro 30‐45' urban m‐moderate Better in low pH Good Tends to have more of a central leader. Tolerant of urban conditions.


Acer campestre Hedge Maple Europe 30‐35' urban d‐tolerates dry Very tolerant Good Seeds heavily, very dense. Tolerates Urban conditions well.

Available in the trade as both single and multi stem plants. For single‐stem request straight central leader, higher limbs.

Acer campestre ‘Queen Elizabeth’ Queen Elizabeth Hedge Maple Europe/ USA intro 30‐35' urban d‐tolerates dry Very tolerant Good Better selection. Tolerates Urban conditions well. Straight central leader, higher limbs.

Acer griseum Paperbark Maple China 20‐30' rural m‐moderate Better in low pH Poor Very slow. Beautiful exfoliating bark can be subject to vandalism. Somewhat expensive.


Acer miyabei 'State Street' State Street Miyabei Maple Asia/ USA intro 35‐45' urban d‐tolerates dry Very tolerant Good From the Morton Arboretum, exceptional tolerance to urban pollution.

Slightly larger tree ‐ give ample space.

Acer palmatum Japanese Maple NE Asia 15‐30' rural m‐moderate Better in low pH Poor Plant in grass strips & mulch to avoid weed‐wacker damage.


Acer tataricum Tatarian Maple Europe 20‐25' urban d‐tolerates dry Very tolerant Good Has shown invasive tendencies. Tolerates Urban conditions well.


Acer tataricum ‘GarAnn’ Hotwings Tatarian Maple Europe/ USA intro 20‐25' urban d‐tolerates dry Very tolerant Good Has shown invasive tendencies, Colorful samaras. Tolerates Urban conditions well.


Acer tataricum ‘Patdell’ Pattern Perfect Tatarian Maple Europe/ USA intro 20‐25' urban d‐tolerates dry Very tolerant Good Has shown invasive tendencies, Dark glossy thick leaves. Tolerates Urban conditions well.


Acer triflorium Three Flower Maple NE Asia 25‐30' suburban m‐moderate Better in low pH Poor Tough to find, very ornamental. Good fall color. Straight central leader, higher limbs.

Acer x 'Warrenred' Pacific Sunset® Maple Asia/ USA Hybrid 30‐35' urban m‐moderate Very tolerant Good Dark glossy leaves, good fall color. Slightly larger tree ‐ give ample space.Acer x 'Cinnamon Flake' Cinnamon Flake Maple Hybrid 25‐30' rural m‐moderate Better in low pH Poor Very slow. Beautiful exfoliating bark can be subject

to vandalism. Somewhat expensive. Developed by Sid Waxman ‐ UCONN.

Choose ones grafted onto Acer Saccharum.

Acer x 'Ginzam' Gingerbread™ Maple Hybrid 20‐25' rural m‐moderate Better in low pH Poor Very slow. Beautiful exfoliating bark can be subject to vandalism. Somewhat expensive.

Choose ones grafted onto Acer Saccharum.

Aesculus x arnoldiana ‘Autumn Splendor’ Autumn Splendor Chestnut Hybrid 30‐35' suburban m‐moderate Tolerant Good Flowering ‐ yellow. Good fall color. Will take most conditions, some minor leaf problems.

Choose ones with high limbs to start.

Alnus x 'Spaethii' Spaeth's Alder European hybrid 40‐65' suburban d‐tolerates dry Very tolerant Good Lustrous green leaves. New to US ‐ Widely used in Europe. Takes compacted soils.

Slightly larger tree ‐ give ample space.

Amelanchier arborea Downy Serviceberry Native 20‐30' suburban m‐moderate Tolerant Good Flowering ‐ April/ White. Edible fruit can cause staining. Rust, Powderly Mildew, Black knot, Fire and Leaf Blight problems. Tolerant of shade.

Best chosen as a single stem, can be used as a multistem tree. Select single stem ones budded on A. laevis for minimal suckering. Choose those that have been pruned hard.

Amelanchier canadensis ‘Glennform’ Rainbow Pillar® Serviceberry Native selection 15‐20' suburban w‐tolerates wet Tolerant Good Flowering ‐ April/ White. Edible fruit can cause staining. Dense head. Upright. Relatively disease resistant. Tolerant of shade.

Best chosen as a single stem, choose initially with higher branching. Select ones budded on A. laevis for minimal suckering.

Compiled by Ed Gregan and Darryl Newman Page 1 of 8



Amelanchier laevis Allegany Serviceberry Native 20‐30' suburban w‐tolerates wet Tolerant Good Flowering ‐ April/ White. More open in form. More sucker‐less than other Shad. Edible fruit can cause staining. Rust, Powderly Mildew, Black knot, Fire and Leaf Blight problems. Tolerant of shade.

Best chosen as a single stem, choose initially with higher branching and pruned hard.

Amelanchier laevis 'Cumulus' Cumulus® Serviceberry Native selection 20‐30' suburban w‐tolerates wet Tolerant Good Flowering ‐ April/ White. More open in form. More sucker‐less than other Shad. Edible fruit can cause staining. Rust, Powderly Mildew, Black knot, Fire and Leaf Blight problems. Tolerant of shade.

Best chosen as a single stem, choose initially with higher branching and pruned hard. Select ones budded on A. laevis for minimal suckering.

Amelanchier laevis 'Rogers' Lustre® Serviceberry Native selection 20‐30' suburban w‐tolerates wet Tolerant Good Flowering ‐ April/ White. Good disease resistance. Stronger branching habit. Tolerant of shade.


Amelanchier x grandiflora ‘Autumn Brilliance’ Autumn Brilliance® Apple Serviceberry Hybrid 20‐25' suburban w‐tolerates wet Tolerant Good Flowering ‐ April/ White. Rust, Powderly Mildew, Black knot, Fire and Leaf Blight. Tolerant of shade.


Amelanchier x grandiflora ‘Princess Diana’ Princess Diana Apple Serviceberry Hybrid 20‐25' suburban w‐tolerates wet Tolerant Good Flowering ‐ April/ White. Rust, Powderly Mildew, Black knot, Fire and Leaf Blight. Needs hard pruning. Tolerant of shade.


Amelanchier x grandiflora ‘Forest Prince' Forest Prince Apple Serviceberry Hybrid 20‐25' suburban w‐tolerates wet Tolerant Good Flowering ‐ April/ White. Rust, Powderly Mildew, Black knot, Fire and Leaf Blight. Needs hard pruning. Tolerant of shade.


Amelanchier x grandiflora ‘Robin Hill’ Robin Hill Apple Serviceberry Hybrid 15‐20' suburban w‐tolerates wet Tolerant Good Pink flowering ‐ April/ White. Rust, Powderly Mildew, Black knot, Fire and Leaf Blight. Needs hard pruning. Tolerant of shade.


Carpinus betulus European Hornbeam Europe 30‐40' urban d‐tolerates dry Better in low pH Good Tough wooded. Can be pruned hard. Is tolerant of most Ph conditions but prefers acid. Form varies based on seed source.

Best chosen as a single stem with a central leader. Choose initially with higher branching. Makes an excellent hedge.

Carpinus betulus ‘Fastigiata’ Pyramidal European Hornbeam Europe 30‐40' urban d‐tolerates dry Better in low pH Good Tough wooded. Upright at first, wider with age. Is tolerant of most Ph conditions but prefers acid.

Best chosen as a single stem, choose initially with higher branching. Avoid "V" crotches. C. b. 'Columnaris' & 'Pyramidalis' are similar.

Carpinus betulus ‘Franz Fontaine’ Franz Fontaine Columnar Hornbeam Europe 30‐35' a‐ urban d‐tolerates dry Better in low pH Good Tough wooded. Very upright. Is tolerant of most Ph conditions but prefers acid.

Best chosen as a single stem with a central leader. Choose initially with higher branching. Avoid double leaders.

Carpinus caroliniana American Hornbeam/Ironwood/Blue Beech Native 20‐30' suburban w‐tolerates wet Tolerant Poor Free of serious pests and diseases although anthracnose can be a problem. Form varies based on seed source. Extra water needed during drought conditions.

Root pruned trees transplant better. Best transplanted in spring. Choose plants from a northern seed source. Specify smaller caliper trees. Single stem or multistem available in the trade.

Carpinus japonica Japanese Hornbeam Japan 20‐25' suburban m‐moderate Tolerant Poor Free of serious pests and diseases. Fan‐like habit. Interesting bark and Hop‐like seed heads.

Best chosen as a single stem with a central leader. Choose initially with higher branching.

Celtis occidentalis Hackberry Native 30‐35' urban d‐tolerates dry Better in high pH Excellent Tough wooded. Slow. Corky bark. Can be planted in planters and in concrete aprons. Very hardy tree. Wind and salt tolerant.

Choose trees that have been thinned. Specify both caliper and height.




Celtis occidentalis 'Chicagoland' Chicagoland® Hackberry Native selection 40‐45' urban d‐tolerates dry Better in high pH Excellent Tough wooded. Faster grower with strong central leader. Can be planted in planters and in concrete aprons. Very hardy tree. Wind and salt tolerant.

Choose trees that have been thinned. Specify both caliper and height.

Cercis canadensis Redbud Native 20‐30' suburban d‐tolerates dry Better in high pH Poor Flowering ‐ excellent pink flower display. Heart‐shaped leaves. Pea‐like fruit capsules. Short‐lived trees.

Avoid trees with "V" type crotches, choose root pruned trees. Smaller caliper trees transplant better. Spring best! Single stem or multistem available in the trade. Choose trees grown from northern seed sources.

Cercis canadensis 'Appalachian Red' Appalachian Red Redbud Native selection 20‐30' suburban d‐tolerates dry Better in high pH Poor Flowering ‐ intense pink flower display. Heart‐shaped leaves. Pea‐like fruit capsules. Short‐lived trees.

Avoid trees with "V" type crotches. Choose root pruned trees. Smaller caliper trees transplant better. Spring best! Single stem or multistem available in the trade. Choose trees grown from northern seed sources.

Cercis canadensis 'Forest Pansy' Forest Pansy Red‐leaf Redbud Native selection 20‐30' suburban d‐tolerates dry Better in high pH Poor Flowering ‐ excellent pink flower display. Heart‐shaped leaves. Pea‐like fruit capsules. Short‐lived trees.

Avoid trees with "V" type crotches. Choose root pruned trees. Smaller caliper trees transplant better. Spring best! Single stem or multistem available in the trade. Choose trees grown on understock from northern seed sources.

Cercis canadensis 'Royal White' White Flowering Redbud Native selection 20‐30' suburban d‐tolerates dry Better in high pH Poor Flowering ‐ excellent white flower display. Heart‐shaped leaves. Pea‐like fruit capsules. Short‐lived trees.

Avoid trees with "V" type crotches. Choose root pruned trees. Smaller caliper trees transplant better. Spring best! Single stem or multistem available in the trade. Choose trees grown on understock from northern seed sources.

Chionanthus retusus Chinese Fringtree NE Asia 15‐20' suburban d‐tolerates dry Tolerant Good Flowering. White, extremely showy, fragrant flowers in the spring. Pretty bark.


Cladrastis kentukea American Yellowwood Native 30‐35' suburban m‐moderate Tolerant Poor Flowering ‐ White in May/ June, fragrant. Smooth bark can be vandalized. Attracts bees.

Straight central leader, higher limbs. Avoid "V" crotches! Best pruned in summer.

Cladrastis kentukea 'Perkins Pink' Pink Flowering Yellowwood Native selection 30‐35' suburban m‐moderate Tolerant Poor Flowering ‐ late, pink, fragrant. Smooth bark can be vandalized. Attracts bees.

Straight central leader, higher limbs. Avoid "V" crotches! Best pruned in summer.

Cornus florida ‘Appalachian Spring’ Appalachian Spring Flowering Dogwood Native selection 20‐30' rural m‐moderate Better in low pH Poor Flowering ‐ White. Plant in grass strips & mulch to avoid weed‐wacker damage. May need additional water during dry periods.

Spring planting is best. Purchase northern grown trees. Budded/ grafted onto Cornus florida best.

Cornus florida ‘Karen’s Appalachian Blush’ Appalachian Blush Flowering Dogwood Native selection 20‐30' rural m‐moderate Better in low pH Poor Flowering ‐ Pink. Plant in grass strips & mulch to avoid weed‐wacker damage. May need additional water during dry periods.

Spring planting is best. Purchase northern grown trees. Budded/ grafted onto Cornus florida best.

Cornus kousa Korean or Kousa Dogwood NE Asia 20‐25' suburban m‐moderate Better in low pH Poor Flowering ‐ white in June. Edible fruit can be a nuisance. Habit varies from seed source. May need additional water during dry periods.

Available in the trade as both single and multi stem plants. Consider planting single stem trees at 3" caliper plus if higher branches are desired.

Cornus kousa ‘Galzam’ Galilean Korean Dogwood NE Asia/ US intro 20‐25' suburban m‐moderate Better in low pH Poor Flowering ‐ white in June. Noted for its large dark green foliage. Edible fruit can be a nuisance. May need additional water during dry periods.

Straight central leader, higher limbs. Best budded/ grafted onto C. kousa.




Cornus kousa ‘Milky Way’ Milky Way Korean Dogwood NE Asia/ US intro 20‐25' suburban m‐moderate Better in low pH Poor Flowering ‐ white in June. Edible fruit can be a nuisance. May need additional water during dry periods.


Cornus kousa ‘Samzam’ Samaritan Korean Dogwood NE Asia/ US intro 15‐20' suburban m‐moderate Better in low pH Poor Flowering. Variegated leaves. Upright form. Sun scald in bright areas. May need additional water during dry periods.


Cornus mas Cornelian Cherry Dogwood NE Asia 15‐25' suburban m‐moderate Better in low pH Poor Flowering ‐ very early. Strong wooded. Plant in grass strips & mulch to avoid weed‐wacker damage.

Available in the trade as both single and multi stem plants. Root pruned trees transplant better. Specify smaller caliper trees.

Cornus mas ‘Golden Glory’ Golden Glory Cornelian Cherry Dogwood NE Asia/ US intro 15‐25' suburban m‐moderate Better in low pH Poor Flowering ‐ very early. Strong wooded. Plant in grass strips & mulch to avoid weed‐wacker damage.


Cornus x ‘Rutban’ Aurora Dogwood Hybrid 25‐30' suburban m‐moderate Better in low pH Poor Flowering white ‐ late. Needs water during dry periods.

Check for graft rejection. Straight central leader, higher limbs.

Cornus x ‘Rutcan’ Constellation Dogwood Hybrid 20‐25' suburban m‐moderate Better in low pH Poor Flowering white ‐ late. Most upright form. Needs water during dry periods.


Cornus x ‘Rutgan’ Stellar Pink Dogwood Hybrid 20‐25' suburban m‐moderate Better in low pH Poor Flowering pink ‐ late. Needs water during dry periods.


Cornus x ‘Venus’ Venus Dogwood Hybrid 25‐30' suburban m‐moderate Better in low pH Poor Flowering white ‐ late. Very large flowers. Needs water during dry periods.


Crataegus ambigua Russian Hawthorn Europe 15‐18' urban d‐tolerates dry Tolerant Good Flowering white. Adapts to extreme temperatures and soil conditions. Very drought tolerant. Resistant to cedar Apple Rust.

Root pruned trees transplant better. Specify smaller caliper trees. Single stem best.

Crataegus crus‐galli var. inermis Thornless Cockspur Hawthorn Native selection 15‐20' urban d‐tolerates dry Tolerant Excellent Flowering white. Fruiting. Tolerates hot, dry and salty conditions.

Root pruned trees transplant better. Specify smaller caliper trees. Single stem

Crataegus crus‐galli var. inermis ‘Cruzam’ Crusader Thornless Hawthorn Native selection 15‐20' urban d‐tolerates dry Tolerant Excellent Flowering white. Fruiting. Tolerates hot, dry and salty conditions. Tolerates Urban conditions well.


Crataegus laevigata 'Superba' Crimson Cloud English Hawthorn Europe 15‐20' urban d‐tolerates dry Tolerant Excellent Flowering red. Fruiting. Tolerates hot, dry and salty conditions. Susceptible to Rust and Fire blight.


Crataegus phaenopyrum 'Westwood' Washington Lustre Washington Hawthorn Native selection 20‐25' urban d‐tolerates dry Tolerant Good Flowering ‐ early. Vigorous. Tolerant of Urban Conditions. Has fewer thorns than species. Tolerates Urban conditions well.


Crataegus viridis ‘Winter King’ Winter King Hawthorn Native selection 20‐30' urban d‐tolerates dry Tolerant Good Flowering white ‐ late. Be cautious of thorns. Tolerates Urban conditions well.


Halesia carolina 'Arnold Pink' Arnold Pink Carolina Silverbell Native selection 30‐40' rural m‐moderate Tolerant Poor Flowering pink. Unique seeds. Beautiful bark when mature.


Koelrueteria paniculata Golden Rain Tree NE Asia 30‐40' urban d‐tolerates dry Tolerant Good Flowering ‐ Yellow/ June. Has shown invasive tendencies. Seed can be a nuisance. Can get large in certain locations.

Straight central leader, higher limbs. Transplant in spring best. Choose northern grown trees.

Koelrueteria paniculata 'Gocanzam' Golden Candle Golden Rain Tree NE Asia/ US intro 30‐40' urban d‐tolerates dry Tolerant Good Flowering ‐ Yellow/ June. Very upright. Has shown invasive tendencies. Seed can be a nuisance. Can get large in certain locations.

Straight central leader, higher limbs. Transplant in spring best. Choose northern grown trees.

Maackia amurensis Amur Maackia NE Asia 20‐30' urban d‐tolerates dry Tolerant Good Flowering ‐ White. Prefers non‐compacted soils. Requires bigger tree pits. Unique bark.





Maackia amurensis ‘Starburst’ Starburst Amur Maackia NE Asia/ US intro 25‐30' urban d‐tolerates dry Tolerant Good Flowering ‐ White. More uniform in flowers and structure. Prefers non‐compacted soils. Requires bigger tree pits. Unique bark.


Magnolia stellata Star Magnolia Japan 10‐20' rural m‐moderate Better in low pH Poor Flowering white, fragrant ‐ early. Thin bark can be injured easily. Protect from high winds.


Magnolia x loebneri 'Merrill' Merrill Magnolia Hybrid 25‐40' rural m‐moderate Better in low pH Poor Flowering white, fragrant ‐ early. Thin bark can be injured easily. Protect from high winds.


Magnolia 'Galaxy' Galaxy Magnolia Hybrid 20‐30' rural m‐moderate Better in low pH Poor Flowering pink, fragrant ‐ early. Thin bark can be injured easily. Protect from high winds. Flower petal litter can be a nuisance.


Malus ‘Cinzam’ Cinderella Crabapple Hybrid 15‐20' urban d‐tolerates dry Tolerant Good Flowering. Compact. Disease resistant. Persistent fruit. Performs well in containers.

Choose top‐grafted trees on higher standards. Look for sucker less root stock such as SproutFree®.

Malus ‘Donald Wyman’ Donald Wyman Crabapple Hybrid 20‐25' urban d‐tolerates dry Tolerant Good Flowering. Disease resistant. Persistent fruit. Good glossy green foliage. Good leader ‐ can be limbed up easily.

Look for sucker less root stock such as SproutFree®. Straight leader.

Malus ‘Lanzam’ Lancelot Crabapple Hybrid 15‐20' urban d‐tolerates dry Tolerant Good Flowering. Compact. Disease resistant. Persistent fruit. Performs well in containers.


Malus ‘Lollizam’ Lollipop Dwarf Crabapple Hybrid 15‐20' urban d‐tolerates dry Tolerant Good Flowering. Compact. Disease resistant. Persistent fruit. Performs well in containers.


Malus ‘Red Baron’ Red Baron Crabapple Hybrid 18‐20' urban d‐tolerates dry Tolerant Good Flowering. Purple foliage. Good disease resistance but susceptible to scab. Good leader ‐ can be limbed up easily.


Malus ‘Jewelcole’ Red Jewel® Crabapple Hybrid 15‐20' urban d‐tolerates dry Tolerant Good Flowering. Narrow form. Disease resistant. Firm persistent red fruit.


Malus 'Fridlund' Royal Gem® Crabapple Hybrid 12‐15' urban d‐tolerates dry Tolerant Good Flowering. Purple foliage. Compact. Good disease resistance.


Malus ‘JFS‐KW5’ Royal Raindrops® Crabapple Hybrid 15‐20' urban d‐tolerates dry Tolerant Good Flowering. Cut purple foliage. Compact. Excellent disease resistance. Good leader ‐ can be limbed up easily.


Malus ‘Snowdrift’ Snowdrift Crabapple Hybrid 20‐25' urban d‐tolerates dry Tolerant Good Flowering ‐ White. Fire blight resistant, tolerant of Scab.


Malus ‘Spring Snow’ Spring Snow Crabapple Hybrid 20‐25' urban d‐tolerates dry Tolerant Good Flowering ‐ White. Virtually fruitless. Fire blight resistant, severely susceptible to scab.


Malus ‘Sutyzam’ Sugar Tyme® Crabapple Hybrid 15‐20' urban d‐tolerates dry Tolerant Good Flowering ‐ White. Persistent red fruit. Good disease resistance ‐ some Fire blight issues.

Look for sucker less root stock such as SproutFree®.

Nyssa sylvatica Black/Sour Gum, Tupelo, Pepperidge Native 30‐50' suburban w‐tolerates wet Tolerant Excellent Takes poor and compacted soils. Excellent fall color. Females drop black fruit which can stain. Prefers more acid soils but is tolerant of most. Difficult to transplant. Tap rooted.

Specify both caliper and height. Choose males if possible. Never remove leader. Straight leaders a must. Best transplanted in spring.




Nyssa sylvatica ‘Red Rage’ Red Rage Black Gum Native selection 30‐50' suburban w‐tolerates wet Tolerant Excellent Glossy burgundy new growth. Takes poor and compacted soils. Excellent fall color. Females drop black fruit which can stain. Prefers more acid soils but is tolerant of most. Difficult to transplant. Tap rooted.

Specify both caliper and height. Choose males if possible. Never remove leader. Straight leaders a must.

Nyssa sylvatica ‘Wildfire’ Wildfire Black Gum Native selection 30‐50' suburban w‐tolerates wet Tolerant Excellent Glossy burgundy new growth. Takes poor and compacted soils. Excellent fall color. Females drop black fruit which can stain. Prefers more acid soils but is tolerant of most. Difficult to transplant. Tap rooted.

Specify both caliper and height. Choose males if possible. Never remove leader. Straight leaders a must.

Ostrya virginiana American Hophornbeam Native 25‐40' suburban m‐moderate Tolerant Poor Tough wooded. Attractive to birds and squirrels. Habit varies from seed source.

Root pruned trees transplant better. Specify smaller caliper trees. Single stem. Choose trees from northern seed sources.

Oxydendrum arboreum Sourwood Native 20‐25' rural m‐moderate Better in low pH Poor Flowering ‐ white pendulous in July. Excellent fall color. No major disease/ insect troubles.

Specify both caliper and height. Never remove leader. Straight leaders a must. Choose trees from northern seed sources.

Phellodendron amurense 'Macho' Macho Amur Corktree NE Asia/ US intro 35‐45' suburban d‐tolerates dry Tolerant Good Male clone ‐ no fruit. Takes urban conditions. Straight central leader, higher limbs.Parrotia persica Persian Parrotia/Ironwood SW Asia 20‐40' suburban m‐moderate Better in low pH Good Flowering ‐ white with red stamens. Relatively slow

grower. Interesting bark. Good fall color. Tough wooded. Resistant to many insect and diseases. Will take many soil and Ph conditions, but prefers acid and well‐drained. Habit varies from seed source.

Available in the trade as both single and multi stem plants.

Parrotia persica ‘Ruby Vase’ Ruby Vase Persian Parrotia/Ironwood SW Asia/ NA intro 30‐35' suburban m‐moderate Better in low pH Good Flowering ‐ white with red stamens. Clonal form distinctly vase shaped. Interesting bark. Good fall color. Tough wooded. Resistant to many insect and diseases. Will take many soil and Ph conditions, but prefers acid and well‐drained.


Parrotia persica ‘Vanessa’ Columnar Persian Parrotia/Ironwood SW Asia/ US intro 25‐30' suburban m‐moderate Better in low pH Good Flowering ‐ white with red stamens. Upright. Interesting bark. Good fall color. Tough wooded. Resistant to many insect and diseases. Will take many soil and Ph conditions, but prefers acid and well‐drained.


Prunus cerasifera ‘Cripoizam’ Crimson Point® Purple Leaf Plum NE Asia/ US intro 20‐25' suburban m‐moderate Better in high pH Good Flowering ‐ pink/ April. Reddish foliage. Bares delicious edible fruit which can be messy.

Look for ones budded on Myro rootstock. Check for narrow growth. Some confusion in parentage has been seen.

Prunus padus ‘Drietree’ Merlot™ Bird Cherry Eurasia/ US intro 25‐30' suburban m‐moderate Tolerant Good Flowering ‐ white. Dark purple foliage in summer. Upright habit. Light fruit set but can cause staining. Does not sucker like other Bird Cherry. Very cold hardy. Does not like extreme heat.


Prunus sargentii Sargent Cherry Japan 35‐40' urban m‐moderate Tolerant Good Flowering ‐ light pink/ April. Good fall color and bark. Vase‐shaped. Susceptible to trunk damage. Can be short lived.

Look for straight leader and consistent branching. Own root best.

Prunus sargentii ‘Columnaris’ Columnar Sargent Cherry Japan/ US intro 30‐35' urban m‐moderate Tolerant Good Flowering ‐ light pink/ April. Good fall color and bark. Very upright. Can be short Lived.

Look for straight leader and consistent branching. Own root best.

Prunus sargentii ‘Rancho’ Rancho Columnar Sargent Cherry Japan/ US intro 20‐30' urban m‐moderate Tolerant Good Flowering ‐ light pink/ April. Good fall color and bark. Very upright. Usually top grafted. Susceptible to trunk damage. Can be short lived.

Look for ones on higher grafts.




Prunus serrulata ‘Kwansan’ Kwansan Japanese Flowering Cherry Japan 25‐35' urban m‐moderate Tolerant Excellent Flowering ‐ double deep rose pink in late April. Will take high winds and salt spray. Susceptible to trunk damage. Some may be top‐grafted.

Look for trees with spaced limbs and a central leader. Own root best.

Prunus serrulata ‘Mount Fuji’ Mt. Fuji Japanese Flowering Cherry Japan 15‐20' urban m‐moderate Tolerant Good Flowering pink, fragrant. Susceptible to trunk damage. Good fall color. Short lived. Can be planted in planters and in concrete aprons.


Prunus subhirtella ‘Autumnalis’ Autumnalis Higan Cherry Japan 20‐25' urban m‐moderate Tolerant Good Flowering ‐ very early Pink to white. May flower again in fall. Susceptible to trunk damage. Good fall color. Short lived. Can be planted in planters and in concrete aprons.

Choose trees that have been thinned from the inside out. Own root best.

Prunus virginiana ‘Canada Red’ Canada Red Chokecherry Native selection 20‐25' suburban m‐moderate Tolerant Good Flowering ‐ white clusters in late April. Edible fruit can stain. Short‐lived. Can sucker heavily.


Prunus x ‘Accolade’ Accolade Cherry Hybrid 20‐25' urban m‐moderate Tolerant Good Flowering ‐ soft pink/ Early April. Good fall color. Short lived. Can be planted in planters and in concrete aprons. Susceptible to trunk damage.


Prunus x 'Okame' Okame Cherry Hybrid 15‐20' urban m‐moderate tolerant Good Flowering ‐ early. Good fall color. Short lived. Can be planted in planters and in concrete aprons. Susceptible to trunk damage.


Prunus x ‘Snow Goose’ Snow Goose Cherry Hybrid 15‐20' urban m‐moderate Tolerant Good Flowering ‐ white and a bit later than most Cherry. Upright. Short lived. Can be planted in planters and in concrete aprons. Susceptible to trunk damage.


Prunus x yedoensis ‘Akebono’ Akebono Flowering Cherry Hybrid 20‐25' urban m‐moderate Tolerant Good Flowering ‐ soft pink/ April. Short lived. Can be planted in planters and in concrete aprons. Susceptible to trunk damage.


Pyrus calleryana ‘Jaczam’ Jack® Dwarf Callery Pear NE Asia/ US intro 15‐20' urban w‐tolerates wet Tolerant Good Flowering ‐ white. Small compact slow grower. Better disease resistance.


Pyrus fauriei ‘Westwood’ Korean Sun Pea Pear NE Asia/ US intro 15‐20' urban m‐moderate Tolerant Good Flowering ‐ white. Very compact, slow grower. Good fall color.


Syringa reticulata Japanese Tree Lilac Japan 20‐25' urban d‐tolerates dry Better in high pH Excellent Flowering ‐ white/ mid‐June. Nice bark. Habit varies from seed source.

Best chosen as a single stem, choose initially with higher branching. Avoid double leaders.

Syringa reticulata ‘Willamette’ Ivory Pillar® Japanese Tree Lilac NE Asia/ US intro 20‐25' urban d‐tolerates dry Better in high pH Excellent Flowering ‐ white/ mid‐June. Nice bark. Upright. Salt spray tolerant.


Syringa reticulata ‘Ivory Silk’ Ivory Silk Japanese Tree Lilac NE Asia/ US intro 20‐35' urban d‐tolerates dry Better in high pH Excellent Flowering ‐ white/ mid‐June. Nice bark. Salt spray tolerant.

Some mix ups have been found in the trade. Make sure you are purchasing 'Ivory Silk'.

Syringa reticulata ‘Elliott’ Snowcap™ Japanese Tree Lilac NE Asia/ US intro 15‐20' urban d‐tolerates dry Better in high pH Excellent Flowering ‐ white/ mid‐June. Heavy flowering. Nice bark. More compact


Syringa reticulata spp. pekinensis ‘Zhang Zhiming’ Beijing Gold™ Pekin Lilac Asia/ USA intro 15‐20' urban d‐tolerates dry Tolerant Good Flowering ‐ Yellow. From the Morton Arboretum, intolerant of poorly drained soils

Choose trees that have been thinned from the inside out.

Syringa reticulata spp. pekinensis ‘Morton’ China Snow™ Pekin Lilac Asia/ USA intro 30‐35' urban d‐tolerates dry Tolerant Good Flowering. From the Morton Arboretum, intolerant of poorly drained soils


Syringa reticulata spp. pekinensis ‘Summer Charm’ Summer Charm Pekin Lilac Asia/ USA intro 25‐30' urban d‐tolerates dry Tolerant Good Flowering ‐ Creamy white and fragrant. Rapid grower.


Tilia cordata 'Halka' Summer Sprite® Linden Europe/ USA intro 15‐20' urban m‐moderate Tolerant Good Small slow growing dense tree. Some Japanese Beetle trouble. Takes salt spray.

Slow growing = expensive.

Viburnum lentago Nannyberry Native 15‐20' suburban w‐tolerates wet Tolerant Poor Flowering ‐ creamy‐white. Fruit attracts birds. Habit varies from seed source.





Viburnum prunifolium Black Haw Viburnum Native 12‐15' suburban d‐tolerates dry Tolerant Poor Flowering ‐ white. Habit varies from seed source. Choose single stem plants.

Zelkova serrata ‘Schmidtlow’ Wireless® Japanese Zelkova NE Asia/ US intro 20‐25' urban d‐tolerates dry Tolerant Good Broad spreading shape. Good red fall color. Straight central leader, higher limbs. Choose trees that have been thinned.

Notes: urban = Concrete aprons/ planters; suburban = Grass strips between curb and walk; rural = large grass areas.


Nursery Practices and Specifications Edmund R. Gregan II

Page 1

STREET TREE SPECIFICATIONS 1. Nomenclature

Plant names conform to the nomenclature generally accepted in the nursery trade. The following texts are used as reference: Dirr, Michael A. 1998. Manual Of Woody Landscape Plants, 5th Edition, Stipes. Champaign, IL.; Bailey Hortorium. 1976. Hortus III. Macmillan Co. New York, NY.

2. Plant Measurements Sizing and grading standards shall conform to those published in the current edition of AMERICAN STANDARD FOR NURSERY STOCK, by The American Association of Nurserymen, Inc., 1250 I Street NW, Suite 500, Washington, DC 20005. All plants shall be in the upper half of the specified plant size range.

3. Quality All plant materials shall be ‘nursery grown’ in accordance with approved horticultural practices under climatic conditions similar to those in (list your town here). They shall have a habit of growth typical of the species or variety, grown from a single crown of roots and having been root pruned within the last two years. All plant materials must be exceptionally heavy, symmetrical, well branched and proportioned, and densely foliated when in leaf. All trees shall have their main leaders intact and, unless otherwise noted, have single straight trunks free of major branches up to a height of at least six (6) feet. Evergreens and clump form trees shall have dense, compact growth branched to the ground unless otherwise specified. Plants shall be matched when uniformity is required.

4. Substitutions Acceptance of this contract assumes the Contractor is able to supply all plant materials as specified and as indicated in the Plant List. Substitutions will not be permitted unless the specified materials are proven to be unobtainable or cannot meet specification requirements. If substitutions are necessary the use of the next larger size or nearest variety will be considered; such substitutions shall not increase the cost. Proposed substitutions must receive (your title) written authorization. When sources are located by (your title), there will be no substitutions.

Nursery Practices and Specifications Edmund R. Gregan II

Page 2

5. Inspections

Plants shall be inspected, selected and tagged at the place of growth by (your title) with the Contractor. The Contractor shall make all necessary arrangements and will pay for all inspection costs. Notices requesting inspections must be received by (your title) at least five (5) days prior to anticipated inspection dates and within thirty (30) days following acceptance of the bid. Inspection and approval at the source will not waive the right of rejection for failure to meet other requirements.

6. Preparation and Shipment of Plant Materials The Contractor shall obtain and pay for all inspection certificates required and shall file copies with the (your title) before planting. All plants shall be prepared and packed, and protected to insure arrival at the site in good condition. They shall arrive fresh and properly dug, in sound, healthy, vigorous condition, with healthy well-developed tops and root systems. They shall be free of defects, eggs, larvae, insects, disease, injuries and physical damage, with all parts moist and showing active green cambium when cut. No plant branches shall be pruned prior to delivery. Deliveries shall correspond to planting schedules to insure immediate planting. Protection and handling of plants must be by approved horticultural methods to insure total recovery and healthy development. All plants shall be balled and burlapped (B&B), unless noted, and shall be moved as solid units having firm natural balls of soil of sufficient size to encompass the fibrous and feeding root system to insure full and prompt plant recovery. Plants with loose, manufactured, cracked, broken or undersized balls will be rejected.

7. Planting Seasons Planting shall progress only under favorable weather conditions within the following dates and will not be permitted when the ground is frozen or excessively moist. The Contractor may submit a written request stating conditions for a variance only if special conditions exist. Permission will be given if, in the opinion of the (your title), the variance is warranted. Plant Deciduous Plants Plant Evergreen Plants March 1 to May 30 April 1 to June 15 October 15 until ground freezes September 1 to October 15

Street Tree List

Date Page1Municipality Name

Quantity Botanical Name Common Name Size-Caliper Size-Height Notes

Street Tree ListQuantity Botanical Name Common Name Size-Caliper Size-Height Notes

5 Acer griseum Paperbark Maple 2-2.5" 6-8' B&B, Branched at 5'2 Acer griseum Paperbark Maple 2-2.5" 6-8' B&B, Multi-stem6 Acer pennsylvanicum Striped Maple, or Moosewood 2-2.5" 8-10' B&B, Branched at 5'12 Acer plataniodes 'Crimson King' Crimson King Norway Maple 2.5-3" 10-12' B&B, Branched at 6'18 Acer rubrum 'Red Sunset' Red Sunset Red Maple 2.5-3" 12-14' B&B, Branched at 6'3 Acer rubrum 'Armstrong' Armstrong Red Maple 2.5-3" 14' min B&B, Branched at 7'2 Acer saccharum ‘Bailsta’ Fall Fiesta Maple 2.5-3" 10-12' B&B, Branched at 6'12 Acer saccharum ‘Majesty’ Flax Mill Majesty Maple 2.5-3" 10-12' B&B, Branched at 6'6 Acer triflorum Three-flowered Maple 2.5-3" 8-10' B&B, Branched at 5'8 Carpinus betulus ‘Fastigiata’ Fastigiate European Hornbeam 2.5-3" 10-12' B&B, Branched at 6'4 Carpinus japonica Japanese Hornbeam 2-2.5" 8-10' B&B, Branched at 5'2 Chionanthus retusus Chinese Fringe Tree 2-2.5" 6-8' B&B, Branched at 5'9 Gingko biloba Maidenhair Tree 2.5-3" 12' min B&B, Branched at 7'5 Koelreuteria paniculata Goldenrain Tree 2.5-3" 10-12' B&B, Branched at 7'10 Liquidambar styraciflua ‘Worplesdon’ Worplesdon Sweetgum 2.5-3" 10-12' B&B, Branched at 7'6 Malus ‘Spring Snow’ Spring Snow Crabapple 2-2.5" 8-10' B&B, Branched at 6'9 Nyssa sylvatica Black Gum or Black Tupelo 2.5-3" 10-12' B&B, Branched at 7'3 Oxydendrum arboreum Sourwood or Sorrel Tree 2-2.5" 6-8' B&B, Branched at 5'5 Pinus strobus Eastern White Pine 2.5-3" min 7-8' semi-sheared3 Prunus sargentii Sargent's Cherry 2-2.5" 8' min #15 cont. Branched at 5'

6 Pterostyrax hispida Fragrant Epaulettetree 2.5-3" 10-12' B&B, Branched at 5'7 Quercus alba White Oak 2-2.5" 10' min #15 cont. Branched at 5'

8 Quercus macrocarpa Bur Oak 2-2.5" 10' min #15 cont. Branched at 5'

3 Stewartia pseudocamellia Japanese Stewartia 2-2.5" 8-10' B&B, Branched at 5'10 Syringa reticulata 'Ivory Silk' Ivory Silk Tree Lilac 2.5-3" 8-10' B&B, Branched at 6'10 Ulmus americana ‘Princeton’ Princeton Elm 2.5-3" 12-14' B&B, Branched at 7'10 Ulmus japonica x wilsoniana ‘Morton’ Accolade Elm 2.5-3" 12-14' B&B, Branched at 7'

Please note: All trees to have single leaders unless noted.

Date Municipality Name Page1

right tree right site - university of maryland€¦ · right tree, right place december 12, 2013...

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