Quaking Aspen

Swedish Columnar Aspen

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Quaking Aspen

CHERRY, CANADA RED (Prunus virginiana ‘Canada Red’) Ht 20-25 ft, Spd. 18-20 ft. Full sun to part shade. Low to moderate water needs.  New growth is bright green, turning to burgundy-red as the leaves mature.  White flowers in 3”-6” long drooping racemes appear mid-spring followed by small ¼” dark purple fruit.  Fast growing plant that can provide a quick screen and attracts birds.  Easiest to use as a shrub unless suckers are maintained while the tree is young.

CHERRY, SUMMERGLOW (Prunus padus )  Ht 15-25 ft, Spd 20-30 ft.  Full sun to part shade.  Low to moderate water needs.  A medium sized ornamental tree usually occurring as a broad multi-stem but may also be a low branching single stem.  Closely related to chokecherry.  Fragrant white flowers in loose drooping racemes ½” across to 6” long appear in late April to early May.  A black drupe fruit ripens in Late July to early August.  Summer foliage is very similar the Canada Red Cherry. 

CHOKECHERRY, AMUR  (Prunus maackii) Ht 25-30 ft, Spd 25-30 ft.  Full sun to part shade.  Low to moderate water needs.  A small tree producing fragrant white flowers in loose drooping racemes.  A small black drupe fruit ripens late summer and is usually eaten by the birds.  Moderately pyramidal when young maturing to a rounded crown.  The bark ranges in color from polished amber to dark red-brown, with a striking metallic sheen.  The bark is somewhat exfoliating but varies from tree to tree.  An attractive alternate for aspen groves.  Prefers well-drained soils. 

CISTENA, PRUNUS TREE FORM (Prunus x cistena) Ht 8 ft, Spd 6 ft. Full sun to part shade. Low to moderate water needs.  Can be a large multi-stemmed shrub.  Denser and more compact than Newport Plum.  Leaves are a brighter purple.  An excellent dwarf accent tree.  This is also available in a shrub form.

Canada Red Cherry Summerglow Cherry Amur Chokecherry Big Cis Prunus Cistena Tree Form . Canada Red Cherry

COTTONWOOD, HIGHLAND COTTONLESS (Populus acu. x sargentii ‘Higland’)  Ht 45-50 ft, Spd 20-30 ft.  Full sun to part shade.  Low to moderate water needs.  An upright growing disease and pest resistant cottonwood well suited to sites with limited space.  Upright oval habit.  Introduced by Highland Nursery in Greeley.  The original selection was made from the Cheyenne Research Station.  A hardy substitute for the Lanceleaf Cottonwood.   

COTTONWOOD, LANCELEAF COTTONLESS (Polulus x acuminate)  Ht. 40-60 ft., spd. 35-50 ft.  Full sun. Moderate water needs.  Native tree with upright rounded crown.  Glossy medium green leaves are intermediate in size between Plains Cottonwood and Narrowleaf Cottonwood.  Fast growing and hardy. 

COTTONWOOD, NARROWLEAF COTTONLESS (Populus x angustifolia)  Ht. 50-60 ft., spd. 35-45 ft.  Full sun to part shade.  Moderate water needs.  Fast growing native cottonwood with ascending branches that form a pyramidal crown.  The narrow, willow-like leaves are light green in summer turning golden yellow in fall.  It will sucker to form groves, but suckers and be pruned for a single stemmed tree.  Will do well over 8000’ elevation.

COTTONWOOD, NOR’EASTER COTTONLESS (Populus x canadensis ‘Noreaster’) Ht 50-75 ft, Spd 40-45 ft.  Full sun to part shade.  Moderate water needs.  A broad-leafed cottonwood with an upright habit and great branching even when young.  Nor’easter is a sterile female clone that has neither cotton nor pollen and has shown better disease resistance than other clones.  This tree is the fastest growing of all the trees we produce.  You can almost see it grow!

COTTONWOOD, SIOUXLAND COTTONLESS  (Populus deltoides ‘Siousland’)  Ht 70-90 ft, Spd 35-45 ft.  Full sun to part shade.  Moderate water needs. Cottonwood with large, dark green, rust-resistant leaves.  Fast growing oval headed tree that spreads with maturity.  Adaptable. 

COTTONWOOD, STRAIGHT PLAINS COTTONLESS  (Populus sargentii ‘Jeronimus’) Ht 70-80 ft, Spd 40-50 ft.  Full sun to part shade.  Moderate water needs.  This tree was selected for its straight growth habit atypical of the species.  Fast-growing native selections with a broad oval head.  Requires ample room for growth. 

Highland Cottonless Cottonwood Lancleaf Cottonless Cottonwood Narrowleaf Cottonless Cottonwood Nor'Easter Cottonless Cottonwood Straight Plains Cottonless Cottonwood . Highland Cottonless Cottonwood

CRAB, ADAMS  (Malus ‘adams’) Ht 20-25 ft, Spd 20-25 ft. Full sun to part shade.  Low to moderate water needs. A larger densely rounded crabapple.  New foliage has a reddish tint turning to dark green during the summer.  Single dark pink flowers appear in May.  The attractive fruit is persistent.  Showy orange-red fall color.  Rated highly for disease resistance.

CRAB, BECHTEL  (Malus ioensis ‘Plena’) Ht 20-25 ft, Spd 20 ft. Full sun to part shade.  Low to moderate water needs. A small vase shaped tree. Seldom bares fruit. Tolerates a variety of soils, and more tolerant of wet soils than other fruit trees.

CRAB, BRANDYWINE (Malus ‘Brandywine’) Ht 20-30 ft, Spd 20-25 ft. Full sun to part shade.  Moderate water needs. Double pink flowers, Vigorous, upright, spreading habit.  Strong branch development stands up well in snow.  Large, green leaves with purplish tints. Fragrant blossoms are followed by 1 ½” yellow-green apples which can make good jelly.  Excellent resistance to fire blight.  Leaves are burgundy in the fall.

CRAB, CENTURION  (Malus ‘centurion’) Ht 15 ft, Spd 12-15 ft.  Full sun to part shade.  Low to moderate water needs.  Red flowers.   Centurion crabapple has red buds that open to red flowers. The fruit is glossy cherry red and 5/8" in diameter. It has upright growth habit that becomes more oval with age.

CRAB, CORAL BURST (Malus ‘Coralcole’} Ht. 10-15ft., spd. 10-15ft.  Full sun to part shade.  Moderate water needs.   Double pink flowers.  A small, uniform growing globe usually grafted to a 3’ standard.  Pruning is seldom needed.  Dark green leaves are smaller than the species.  Ruby-red flower buds open to semi-double pink flowers.  Excellent resistance to fire blight. 

CRAB, DOLGO (Malus ‘Dolgo’) Ht. 25-35ft., spd. 20-30ft.  Full sun to part shade.  Low to moderate water needs.   White flowers.  Upright spreading form with green foliage and golden yellow bark.  Bears 1 ½” crimson fruit which has excellent flavor and makes good jelly.  Extreme hardiness, fast growth, good fruit flavor, and resistance to fire blight make this a popular crab.   Jerry’s (dad) personal favorite.

CRAB, GOLDEN RAINDROP (Malus ‘golden raindrops ‘)  Ht. 20 ft. spd. 15 ft. Full sun to part shade.  Low to moderate water needs. White flowers.  Perhaps the only crab that could be described as having a delicate appearance. The fine textured foliage is deeply cut. The form is elegant, with slender limbs spreading horizontally from upright branches. The golden yellow fruit is truly tiny.

CRAB, INDIAN MAGIC (Malus ‘Indian Magic’) Ht. 15’, spd. 15ft.  Full sun to part shade.  Low to moderate water needs.   Bright red elongated fruit is of unusual shape and makes this tree beautiful in fall.  Deep pink flowers with dark green foliage.  Fruit is persistent.

CRAB, INDIAN SUMMER (Malus ‘Indian Summer”) Ht. 15-20ft., spd. 15-20ft. Full sun to part shade.  Moderate water needs.  Rose red flowers.  Attractive yellow to orange fall color and the bright red 5/8” fruit which persist through the winter make this a tree for all seasons.

CRAB, PRAIRIEFIRE (Malus ‘Prairiefire’)  Ht. 20 ft., Spd. 20 ft.  Full sun to part shade.  Low to moderate water needs. Excellent disease resistance with purple-red leaves turning green with a red cast.  Small, dark red-purple, persistent fruit follow.  Beautiful pink flowers.

CRAB, PROFUSION (Malus ‘Profusion’)  Ht. 15-20 ft., spd. 15-20 ft.  Full sun.  Low to moderate water needs. This crabapple is noted for its abundant single pink flowers.  The new foliage emerges purple and ages to bronze green.  The maroon ½” fruits are persistent.  Its slender, ascending branches give ‘Profusion’ an upright rounded form.  CSU’s crabapple trials indicate that this crab has good fire blight resistance. 

CRAB. RADIANT  (Malus ‘Radiant’ )  Ht. 20-30 ft., Spd. 20-30 ft.  Full sun.  Moderate water needs.  ‘Radiant’ has a compact rounded form.  Bright red fruit follows its deep pink flowers to 1/5”, which develops color in midsummer and is not persistent.  The bark color is an attractive reddish-orange and shows itself to advantage on the well-developed strong branches.  It continues to be one of the better trees for Front Range community.

CRAB, ROBINSON (Malus ‘Robinson’) ht. 20-25ft., spd. 20-25ft. Full sun to part shade.  Moderate water needs.  Deep pink flowers. This upright crab spreads with age.  Leaves are bronze-green with good fall color.  The buds are a bright crimson and flowers are followed by dark glossy red 3/8” fruit.  A plus for this tree is it’s good to excellent disease resistance for all enemies of the crabapple family: scab, fire blight, rust, and mildew.

CRAB, ROYALTY  (Malus ‘Royalty’)  Ht. 15 ft., Spd. 15 ft.  Full sun.  Moderate water needs. Lovely purplish leaves and red flowers. Excellent for foliage contrast 

CRAB, SARGENT TINA (Malus ‘sargentii’)  Ht. 6-8 ft. spd. 10-12 ft.  Full sun to part shade.  Moderate water needs.  White flower.  A dwarf crabapple with horizontal branching, becoming more broad than tall.  Great accent for small courtyards or patios. Red fruit is persistent.

CRAB, SNOWDRIFT  (Malus ‘Snowdrift’)  Ht. 20 ft., spd. 20 ft.  Full sun to part shade. Low to moderate water needs.  One of the most popular crabs.  The crown is very uniform and symmetrical, making it one of the more formal looking crabs.  Green, glossy foliage with white flowers followed by 3/8” orange, persistent fruit.

CRAB, SPRING SNOW (Malus ‘Spring Snow’) Ht. 20-25ft., spd. 15-20ft. Full sun to part shade.  Moderate water needs. White flowers. ‘Spring Snow’ is characterized by a perfect teardrop shaped head that stands full and erect without pruning, when young, and matures to a rounded form.  A sport from ‘Dolgo’ with medium green foliage and yellow bark color, ‘Spring Snow’s’ main claim is that it bears no fruit.  Disease resistance is not as good as some other crabs, but no others are fruitless.

CRAB, THUNDERCHILD (Malus ‘Thunderchild’) Ht. 15-20ft., spd. 15-20ft.  Full sun to part shade.  Moderate water needs.  Light pink flowers.  Upright, spreading tree with deep purple leaves throughout summer that turn red in fall.  The pink blossoms are followed by ½” dark red fruit.  Excellent resistance to fire blight should make this a tree worth considering for those who desire purple leafed accent plants.

Adams Crab Bechtel Crab Centurion Crab Coral Burst Crab Dolgo Crab Indian Magic Crab Indian Summer Crab Prairiefire Crab Profusion Crab Radiant Crab Robinson Crab Royalty Crab Sargent Tina Crab Spring Snow Crab Thunderchild Crab . Adams Crab

ELM, ACCOLADE (Ulmus japonica x wilsoniana ‘Morton’)  Ht. 70 ft., spd. 60 ft.  Full sun to part shade.  Low to moderate water needs.  Arching limbs and a graceful vase shape characterize this outstanding hybrid elm.  Glossy dark green foliage changes to yellow in the fall and is resistant to elm leaf beetle feeding.  Growth habit gives good form in the nursery and an ultimate form like an American Elm.  It is showing good tolerance to Dutch Elm Disease   We are growing these and will have them in the next few years.

ELM, FRONTIER (Ulmus ‘Frontier’)  Ht 40 ft., spd. 30 ft.  Full sun to part shade.  Low to moderate water needs.  Features beautiful reddish-purple to burgundy fall color which is particularly long lasting.  It is showing good tolerance of Dutch Elm Disease.  We have been growing these for the last several years, and it is new for 2006.

GREEN VASE TREE (Zelkova serrata ‘Green Vase')  Ht. 50 ft, spd. 40 ft.  Full sun to part shade.  Low to moderate water needs.  Vase shape, with upright arching branches.  Finer textured green foliage produces dappled shade, then turns an orange fall color.

GOLDEN RAIN TREE  (Koelreuteria paniculata) Ht. 30-40 ft., spd. 30-40 ft.  Full sun.  Low to moderate water needs.  Large unique compound leaves that emerge red and mature to green.  Panicles, 12-15” long, of small, fragrant yellow flowers cover this tree in mid summer.  Papery pods shaped like Chinese lanterns appear in July and persist until November turning from green to yellow or red, then brown.  A distinctive ornamental tree.  A protected spot is best from planting.

HACKBERRY (Celtis occidentalis) Ht. 40-60 ft., spd. 30-60 ft.  Full sun to part shade.  Low water needs (xeric).   A large shade tree with an irregular habit when young, maturing to a stately rounded crown.  Foliage is light green.  Characteristic corky knobbed bark texture.  Very adaptable and tolerant of heavy soils.  Tiny reddish purple, sweet cherry-like berries that birds love ripen in late summer.  A Colorado native.

Accolade Elm Frontier Elm Golden Rain Tree Green Vase Tree Hackberry . Accolade Elm

HAWTHORN, CRIMSON CLOUD (Crataegus laevigata ‘Crimson Cloud’)  Ht. 15-18 ft. spd. 13-15 ft. Full sun to part shade.  Moderate water needs.  Remarkable clusters of crimson flowers with a white star in the center are surrounded by glossy green leaves.  Red fruit persists into winter.   

HAWTHORN, RUSSIAN (Crataegus ambigua)  Ht. 15-25 ft. spd. 20-25 ft., Full sun to part shade.  Low water needs (xeric).   Russian Hawthorn is a small, attractive, broad-headed tree with a moderate growth rate.  Its gnarled habit gives the tree an interesting silhouette.  Generously endowed with small 3/8” thorns.  Leaves are deeply lobed and medium green in summer.  Numerous corymbs of white flowers appear in late May.  In mid to late summer the whole tree begins to glow as the very abundant 1/5” cherry-like dark red fruits ripen.  They decorate the branches like ornaments for 2-3 weeks and are great for attracting birds.  It occurs as a single or multi-stemmed form.

HAWTHORN, THORNLESS COCKSPUR (Crataegus crusgalli inermis) Ht. 20-30 ft., spd. 20-25 ft., Full sun to part shade.  Low water needs (xeric)  Small, graceful tree with dark green, glossy foliage.  Clusters of white flowers bloom in late May followed by ½” bright red persistent fruit ripening in late September.  Fall color usually is a very fine orange-red.  Good resistance to leaf blight.  A vigorous and attractive small specimen tree.  Exfoliating bark.

HAWTHORN, TOBA (Crataegusx mordenensis ‘Toba’)  Ht. 15-20 ft. spd. 15-18 ft., Full sun to part shade. Low to moderate water needs.   Medium green summer leaves turn yellow to orange in the fall.  Clusters of double white flowers appear in May-June aging to a showy pale pink.  Medium-sized red fruit ripens in late summer.  The branches and trunk become “muscled” with age adding character to older specimens.   

HAWTHORN, WASHINGTON (Crataegus phaenopyrum)  Ht. 15-25 ft., spd. 12-20 ft.  Full sun.  Low to moderate water needs.  This is a small round headed tree.  Clusters of white flowers appear in May followed by glossy red ¼” fruits that persist into winter.  The light green foliage turns scarlet-orange in the fall.  Abundant ½”- 3/4” thorns are attractive.  Excellent for seasonal change.  Occurs as a single or multi-stemmed tree.  Good resistance to fire blight, but can develop chlorosis in alkaline soil.

HAWTHORN, WINTER KING (Crataegus viridis ‘Winter King’) Ht. 20’.  Spd 25 ft.  Full sun.   Low to moderate water needs.  Winter King is an attractive Hawthorn with silvery bark that contrast nicely with dark green, glossy leaves.  The strong, angular lines of its branching pattern give it a bold appearance in the winter.  White flowers in clusters followed by ¼” bright red fruit, then a yellow fall color.

Crimson Cloud Hawthron Russian Hawthorn Thronless Cockspur Hawthorn Toba Hawthorn Washington Hawthorn Winter King Hawthorn . Crimson Cloud Hawthron

HONEYLOCUST, IMPERIAL SEEDLESS (Gleditsia triacanthos inermis ‘Impcole’ )  Ht. 30-35 ft., Spd. 20-35 ft.  Full sun to part shade.   Low water needs (xeric).  A symmetrical, compact variety of thornless, seedless, honeylocust.  Bright green, pinnately compound foliage turns gold in the fall.  Imperial is more compact and uniform than other honeylocusts and works well in smaller landscapes or as a street tree.  Can sometimes produce a few pods.

HONEYLOCUST, SKYLINE SEEDLESS (Gleditsia triacanthos inermis ‘Skycole’)  Ht. 45-50 ft.,  spd.  35-40 ft.  Full sun to part shade.  Low water needs(xeric).  Pyramidal form with strong, sturdy trunk.  Branches are uniformly spaced.  Thornless and podless.  Yellow fall color.  Statuesque crown.

HONEYLOCUST, TRUESHADE/SHADEMASTER SEEDLESS  (Gleditsia triacanthos inermis ‘Trueshade’)  Ht. 45-50 ft., spd. 35-45 ft., Full sun to part shade.  Low water needs(xeric).  Pyramidal form with strong, sturdy trunk.  Branches are uniformly spaced.  Thornless and podless.  Yellow fall color.

KENTUCKY COFFEE TREE (Gymnocladus dioica)  Ht. 50-60 ft., spd. 40-50 ft.  Full Sun.  Low water needs (xeric).  A large shade tree with a narrow habit when young, maturing to an open broad spreading crown.  Pinnately-compounded leaves are blue-green in summer.  Fragrant white flower panicles up to 12” long, bloom on female trees followed by mahogany colored seed pods that persist through winter.  Male trees have 1” flowers, but no pods.  Deeply furrowed bark and stout branches make this tree picturesque in winter.  Superior drought tolerance.

LILAC TREE, JAPANESE  (Syringa reticulata)  Ht. 20-30 ft., spd. 15-20 ft.  Full sun.  Low to moderate water needs.  A prolific bearer of 10”-18” upright panicles of creamy white flowers in early to mid-June, making this the latest lilac to bloom.  Looks best when the lower branches are removed to form a small multi-stemmed tree.  Young branches have glossy dark red-brown to cinnamon-brown exfoliating bark.  Foliage is attractive, although if located in a sot exposed to spring winds, can become shredded and look poor all summer long.  An excellent, hardy, and unusual tree for streets, or wherever a good specimen tree is needed.

LILAC TREE, PEKING (Syringa pekeninsis)  Ht. 20-30 ft. spd. 15-20 ft., Full sun to part shade.   Low to moderate water needs.  A small shrubby tree lilac similar to Japanese Tree Lilac, but smaller leaves suffer less tatter.  Attractive bark is smooth glossy sienna brown, exfoliating on some trees.  Showy creamy white flowers are borne in 4-6” long upright panicles in early June.  Better in windy locations than the Japanese Tree Lilac.

Imperial Honeylocust Skyline Honeylocust Trueshade Honeylocust Kentucky Coffee Tree Japanese Lilac Tree Peking Lilac Tree . Imperial Honeylocust

LINDEN, CORINTHIAN  (Tila cordata ‘Corzam’)  Ht. 45 ft., spd. 15 ft.  Full sun part shade.  Low to moderate water needs.  This is the narrowest of the Linden cultivars.  The leaves are smaller, thicker, and deep green.  They give the tree a finer textured, more delicate appearance.  Dark green foliage with yellow fall color.

LINDEN, GLENLEVEN (Tila cordata ‘Glenleven’)  Ht. 45 ft, spd. 30  ft.  Full sun to part shade.  Low to moderate water needs.  Perhaps one of the most vigorous cordata.  More open and faster growing that some other Linden.  Will have a yellowish fall color.

LINDEN, GREENSPIRE (Tilia cordata “Greenspire’) Ht. 30-40 ft., spd. 30-35 ft.  Full to part sun.  Moderate water needs.  A dense, pyramidal shape and spicy, fragrant flowers in June to July make this a desirable tree.  An excellent lawn of street tree with cinnamon colored bark and dark green leaves that are smaller than the Tilia ‘Americana’  and therefore not as susceptible to wind damage.

LINDEN, REDMOND (Tilia americana ‘Redmond’ )   Ht. 40-60 ft., Spd. 25-30 ft. Full to part sun.  Moderate water needs.  A Linden selection with large, dark green leaves and attractive cherry brown bark, Fragrant, yellow flower clusters in June to July.  Needs good drainage and proper watering.   

LONDON PLANE TREE (Platanus acerifolia ‘Bloodgood’)  Ht. 60 ft., spd. 35 ft.  Full sun to part shade.  Low to moderate water needs.  This wide-spreading, large shade tree is tolerant of city conditions.  Foliage is yellowish green turning yellow in fall.  Bark is mottled and flaking, resembling dragon scales for a unique look.

Redmond Linden Corinthian Linden Greenspire Linden Glenleven Linden London Plane Tree