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Best Trees for Boulder

Best Trees for Boulder

Leaf on background

Select the right tree for the right place

Evaluate your space.  Decide how tall and wide you want your tree to be when it reaches maturity.  

Consider landscape characteristics  such as soil type, irrigation, sunlight exposure, existing trees, and overhead or underground utilities.  

Help make Boulder’s tree canopy diverse and resilient.  Select a different tree than what is already in your yard and surrounding properties.  

Before planting your tree, try using this free online tool created by the USDA Forest Service to help you select the most optimal location for your future tree!  This program allows you to plot trees (both future and existing) on your property and make estimations of future greenhouse gas mitigation, air quality improvements, storm water mitigation, energy savings, and much more. Give it a try!

Large Maturing Trees

Large maturing trees are generally over 55 feet tall and have a crown width of 30 to 60 feet.

(Click on the photo for a larger image.)

Photo Species Common Name Water Needs Form Fall Color Flower Fruit Cultivar
Sugar Maple Acer saccharum Sugar maple medium rounded orange   samara Fall Fiesta, Legacy, Caddo
Common Horsechestnub Aesculus hippocastanum Common horsechestnut medium oval yellow pink to white cluster nut  
Yellow Buckeye Aesculus flava Yellow buckeye medium rounded orange, yellow yellow cluster nut  
Western Catalpa Catalpa speciosa Western catalpa low to medium oval, irregular yellow white orchid like bean pod  
Common Hackberry Celtis occidentalis Northern hackberry low to medium rounded yellow   drupe, small  
Thornless Honeylocust Gleditsia triacanthos Inermis Thornless honeylocust low to medium rounded yellow   fruitless for all cultivars listed Imperial, Shademaster, Skyline
Kentucky Coffeetree Gymnocladus dioicus Kentucky coffeetree low to medium rounded, irregular yellow   bean pod, Espresso cultivar is fruitless Espresso
Liquidamber styraciflua Sweetgum medium oval, irregular orange, purple, red   seed ball  
  Liriodendron tulipifera Tuliptree medium oval yellow yellow tulip like seed capsule  
London Planetree Platanus x acerifolia London planetree medium to high rounded bronze   seed ball Bloodgood, Exclamation
White Oak Quercus alba White oak low to medium rounded red   acorn  
Swamp White Oak Quereus bicolor Swamp White oak medium rounded bronze, orange   acorn  
  Quercus imbricaria Shingle oak medium oval bronze, red   acorn  
Quercus macrocarpa Bur oak low to medium rounded bronze   acorn  
Quercus muehlenbergii Chinkapin oak low to medium rounded bronze   acorn  
English Oak Quercus robur English oak low to medium rounded bronze   acorn  
Accolade Elm Ulmus x accolade Accolade elm low to medium vase yellow   samara  
Ulmus davidiana David elm low to medium vase yellow   samara Discovery

Medium Maturing Trees

Medium maturing trees are generally 30 - 50 feet tall and have a crown width of 20 to 50 feet. Photos and more trees will be added soon!

(Click on the photo for a larger image.)

Photo Species Common Name Water Needs Form Fall Color Flower Fruit Cultivar
Acer campestre hedge maple low to medium oval yellow   samara Queen Elizabeth
  Acer miyabe Miyabe maple low to medium rounded, oval orange to yellow   samara State Street
  Acer negundo Boxelder low to medium rounded yellow   seedless Sensation
  Aesculus glabra Ohio Buckeye medium rounded orange to red white cluster nut Autumn Splendor
Aesculus x carnea Red horsechestnut medium rounded yellow red cluster nut Briotti, Fort McNair
Cladrastis kentukea Yellowwood medium rounded yellow white cluster pod, small  
Corylus colurna Turkish filbert low to medium pyramidal bronze   nut, edible  
Koelreuteria paniculata Goldern raintree low rounded, irregular yellow yellow cluster seed capsule  
  Morus alba White mulberry medium rounded bronze   fruitless cultivars available Select frutiless cultivar
  Phellodendron amurense Amur corktree medium rounded yellow   fruitless for cultivars listed Macho, His Majesty
Pyrus calleryana Flowering pear low to medium oval purple to red white pome, small Cleveland Select, Chanticleer, Autumn Blaze
Styphnolobium japonicum Japanese pagoda tree medium rounded yellow white seed pod, small  
  Sorbus x hybrida Oak leaf mountain-ash medium oval bronze, red white berry cluster  

Small Maturing Trees 

Small maturing trees are generally 15 - 30 feet tall and have a crown width of 15 - 30 feet. Small maturing trees are an excellent choice for under powerlines. Photos and more trees will be added soon!

(Click on the photo for a larger image.)

Photo Species Common Name Water Needs Form Fall Color Flower Fruit Cultivar
  Acer glabrum Rocky Mountain maple medium to high rounded  yellow to red   samara  
Acer grandidentatum Bigtooth maple medium to low rounded  orange to yellow   samara Rocky Mountain Glow
  Acer tataricum Tartarian maple low to medium rounded  yellow to red white cluster samara Hot Wings
  Cercis canadensis Eastern redbud high rounded, spreading yellow pink to purple pod, small  
  Crataegus crusgallii var. inermis Thornless cockspur hawthorn low to medium rounded yellow   drupe, small  
  Crataegus ambigua Russian hawthorn low rounded orange white berry  
  Crataegus x laevigata English hawthorn medium rounded yellow red berry Crimson Cloud, Paul Scarlet
  Crataegus mollis Downy hawthorn low to medium rounded red white berry  
  Crataegus x mordenensis Toba hawthorn medium rounded red white berry  
  Crataegus viridis Green hawthorn low to medium rounded red white berry Winter King
  Crataegus lavellei Lavalle hawthorn medium oval red white berry  
  Maackia amurensis Amur maakia low to medium rounded yellow white seed pod, small  
  Magnolia x soulangiana Saucer magnolia medium rounded bronze white to purple seed cluster  
  Magnolia x Galaxy Galaxy Magnolia medium rounded bronze pink to purple seed cluster  
Malus sylvestris Crabapple  low to medium rounded varies on cultivar varies on cultivar pome, small Royal Raindrops, Hopa, Indian Magic, Prairiefire, Spring Snow, Thunderchild
  Prunus maackii Amur Chokecherry medium rounded yellow white berry  
  Quercus gambelii gambel oak low rounded, irregular bronze   acorn  
Syringa reticulata Japanese Tree Lilac low to medium oval yellow white clusters seed capsule  

More Information