TREE VARIETIES ACCEPTABLE FOR BOULEVARD PLANTING
MEDIUM TO LARGE SHADE TREES
NO OVERHEAD WIRE CONFLICTS
LINDENS: A NATIVE TREE SPECIES. TEND TO PERFORM WELL WITHOUT MAJOR DISEASE OR INSECT PROBLEMS. THEY SHOULD NOT BE PLANTED TOO DEEPLY TO AVOID STEM GIRDLING ROOTS. MOST LINDENS DO DROP FRUIT BRACTS IN SUMMER, WHICH SOME PEOPLE DON'T LIKE BECAUSE OF THE MESS. THERE ARE MANY CULTIVARS OF LINDEN AVAILABLE. ALL WOULD BE ALLOWED FOR BOULEVARD USE.
COMMON NAME SCIENTIFIC NAME COMMENTS
Boulevard linden  Tilia americana'Boulevard'
Redmond linden  Tilia americana 'Redmond'
Frontyard linden Tilia americana 'Bailyard'
Greenspire linden Tilia cordata 'Greenspire'
Norlin linden Tilia x 'Ronald'
Shamrock linden Tilia x 'Baileyi'
Harvest Gold linden Tilia mongolica 'Harvest Gold'
Northern Debut Littleleaf linden Tilia cordata 'Steele'  NDSU introduction
 
MAPLES: MAPLES ARE A POPULAR TREE THAT TEND NOT TO DO WELL IN ALKALINE SOILS. THAT IS WHY WE DON'T RECOMMEND MANY VARIETIES FOR BOULEVARD PLANTING. RED, SUGAR, AND THE FREEMAN HYBRID MAPLES CAN ALL HAVE POTENTIAL CHLOROSIS PROBLEMS (YELLOWING LEAVES). MAPLES TEND TO BE OVER PLANTED, WHICH CAN LEAD TO PROBLEMS DURING INSECT OR DISEASE OUTBREAKS.
Emerald Lustre Norwaymaple Acer platanoides 'Pond' Have had good luck with this one on boulevards
Green Mountain Sugar maple Acer saccharum 'Green Mountain'
Fall Fiesta Sugar maple Acer saccharum 'Bailsta'
Sienna Glen maple Acer x freemanii 'Sieneca'

Reportedly more winter hardy than Autumn Blaze maple
Black maple Acer saccarum ssp. nigrum a subspecies of sugar maple
Northern Flare Sugar maple Acer saccharum 'Sisseton' Northern Flare Sugar maple
   
ELM: AMERICAN ELM HAS BEEN DECIMATED BY DUTCH ELM DISEASE (DED) FOR DECADES. RESISTENT AMERCIAN ELM VARIETIES ARE SLOWLY BEING DEVELOPED. RESISTANT HYBRID ELM VARIETIES HAVE BEEN AVAILABLE FOR THE PAST SEVERAL YEARS. I HAVE LISTED THE VARIETIES COMMONLY AVAILABLE AND SOME WORTHY OF TRIAL BUT HARD TO FIND. ELMS ARE FAST GROWING AND ARE ADAPTABLE TO TOUGH SITES.
Discovery elm Ulmus davidiana var. japonica 'Discovery'
Cathedral elm Ulmus x'Cathedral'
New Horizon elm Ulmus x 'New Horizon'
Vanguard elm

Ulmus x 'Morton Plainsman'
Prairie Expedition elm Ulmus americana'Lewis & Clark'

DED resistant; NDSU introduction. Hard to find at nurseries.
Washington elm Ulmus americana 'Washington' Trial to see if winter hardy
HACKBERRY: NATIVE TREE. RESEMBLES ELM IN SHAPE WHEN MATURE.
Common Hackberry Celtis occidentalis Height 50-75 ft, spread 50 ft.
HONEYLOCUST: UNIQUE LEAF STRUCTURE GIVES DAPPLED SHADE.
Northern Acclaim Honeylocust Gleditsia triacanthos var. inermis 'Harve'

Seedless & thornless. NDSU introduction.
Prairie Silk honeylocust Gleditsia triacanthos var. 'Dursan'

Originated in Manitoba, Canada

 
 

THERE ARE MANY LESS COMMON TREES THAT MERIT TESTING ON BOULEVARDS IN MOORHEAD. THESE TREES MAY BE HARD TO FIND AT LOCAL NURSERIES BUT ARE WORTH SEEKING OUT. HERE ARE SOME TREES WORTH CONSIDERING.

AMUR CORKTREE: AN INTERESTING TREE. SEEMS TO BE WINTER HARDY. TENDS TO BE SLOW GROWING. NO SERIOUS INSECT OR DISEASE PROBLEMS.

His Majesty corktree Phellodendron schalinense 'His majesty' A male selection from the University of Minnesota
Amur corktree

Phellodendron amurense
 

BUCKEYE: THIS IS A HARDY TREE FOR THE AREA. SEEK OUT THE LISTED CULTIVARS, AS SEEDLING OHIO BUCKEYE IS PRONE TO LEAF SCORCH.  THE TREE OFTEN PRODUCES A NUT THAT ATTRACTS WILDLIFE.
Prairie Torch Hybrid buckeye Aesculus x 'Bergeson' Height is smaller than species. NDSU introduction.  
Autumn Splendor Buckeye Aesculus x arnoldiana 'Autumn Splendor'

Univ of Minnesotaintroduction.
Homestead Buckeye Aesculus x 'Homestead?Homestead' SDSU introduction. Red fall color. 
 

KENTUCKYCOFFEETREE:  LOOKS LIKE A STICK WHEN FIRST PLANTED, BUT FILLS OUT NICELY. ASK FOR A NORTHERN SEED SOURCE. KEEP SOD AWAY TO AVOID COMPETITION.  
Kentucky Coffeetree Gymnocladus dioica
Stately Manor Kentucky Coffeetree Gymnocladus dioica 'Stately manor'

a male introduction from the Univ of Minnesota

MOUNTAIN ASH: TEND TO BE SMALL TO MEDIUM HEIGHT TREES. HESITANT TO RECOMMEND DUE TO POTENTIAL IRON CHLOROSIS AND FIRE BLIGHT PROBLEMS. A SHOWY TREE THAT MERITS A TRIAL. THIS TREE IS NOT A TRUE ASH, SO IS NOT A HOST TO EMERALD ASH BORER.
European Mountain ash Sorbus aucuparia
Oakleaf Mountainash Sorbus x hybridia
Russian Mountain ash

Sorbus aucuparia 'Rossiea'
AMUR CHOKECHERRY: LIKE MOUNTAIN ASH, A SHORTER TREE THAT WILL REACH 30' IN HEIGHT AND SO WILL GROW INTO OVERHEAD WIRES. WILL BE ALLOWED ON BOULEVARDS TO DIVERSIFY SPECIES NOW THAT ASH ARE NOT BEING USED. THIS TREE HAS COPPER COLORED BARK THAT PEELS SIMILAR TO BIRCH.  
Amur chokecherry Prunus maackii
IRONWOOD: A SMALLER NATIVE SPECIES.
Ironwood Ostrya virginiana Height 30 feet, spread 25 feet.
UPDATED 2010