SHADE TYPE LARGE TREES Sensation Boxelder Maple Scientific Name: Acer negundo Family: Aceraceae Hardiness Zones 4 to 6. Hardy to -30. Maximum Elevation 9,000 ft. Photos: Colorado Tree Coalition Growth habit: Tree has a pyramidal habit as a young tree becoming more elliptical with maturity. The right angle branching and strong central leader growth habit makes this tree a good choice for streets and parks. Mature Height: 30-35 ft. Mature Width: 20-25 ft. Foliage: Young emerging leaves have a reddish-orange color to them giving the tree a multicolored appearance in the spring and early summer. In the summer leaves are a light green color. Fall foliage color is orange to red and very showy. Flowers: Sensation boxelder is a male tree selection. The male flowers are small and grow in early summer. Bark: The main trunk is gray and slightly furrowed. Insects and diseases: No boxelder bugs have been observed on Sensation box elders planted in western Colorado landscapes. Landscape value: Since Sensation boxelder is a male tree it is much less attractive to the boxelder bug. Boxelder trees are usually very tolerant of temperature extremes, drought and high pH soils, which makes Sensation boxelder an excellent choice for both plains and mountain communities. Information sources: Colorado Tree Coalition - Michael Dirr, Manual of Woody Landscape Plants (University of Georgia, 1990). The Tree Farm
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SHADE TYPE LARGE TREES - Rooted in Laramie · 2020-03-06 · SHADE TYPE LARGE TREES Sensation Boxelder Maple Scientific Name: Acer negundo Family: Aceraceae Hardiness Zones 4 to 6.Hardy
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SHADE TYPE LARGE TREES
Sensation Boxelder Maple Scientific Name: Acer negundo Family: Aceraceae Hardiness Zones 4 to 6. Hardy to -30. Maximum Elevation 9,000 ft.
Photos: Colorado Tree Coalition
Growth habit: Tree has a pyramidal habit as a young tree becoming more elliptical with
maturity. The right angle branching and strong central leader growth habit makes this tree a
good choice for streets and parks. Mature Height: 30-35 ft. Mature Width: 20-25 ft.
Foliage: Young emerging leaves have a reddish-orange color to them giving the tree a
multicolored appearance in the spring and early summer. In the summer leaves are a light
green color. Fall foliage color is orange to red and very showy.
Flowers: Sensation boxelder is a male tree selection. The male flowers are small and grow in
early summer.
Bark: The main trunk is gray and slightly furrowed.
Insects and diseases: No boxelder bugs have been observed on Sensation box elders planted
in western Colorado landscapes.
Landscape value: Since Sensation boxelder is a male tree it is much less attractive to the
boxelder bug. Boxelder trees are usually very tolerant of temperature extremes, drought and
high pH soils, which makes Sensation boxelder an excellent choice for both plains and
mountain communities.
Information sources: Colorado Tree Coalition - Michael Dirr, Manual of Woody Landscape
Plants (University of Georgia, 1990). The Tree Farm
Dakota Pinnacle® Asian White Birch Betula platyphylla 'Fargo' (PP 10,963) (Family Betulaceae) Description: Selected for its narrow columnar to narrowly pyramidal growth habit. Hardier than the species with dense dark green foliage that turns golden yellow in the fall. The bark is white and smooth with slight exfoliation when mature. Dakota Pinnacle® is drought tolerant and has above average tolerance to bronze birch borer and strong winds. Hardiness: USDA hardiness zone 3a-7 Mature Size: Height: 35', Spread: 10-12' Form (Shape): Upright columnar. Growth Rate: Medium - Fast Foliage: Dark green during the summer. In autumn, golden yellow leaves retained until late. Flower: Flowers/fruit are not ornamentally significant. Special Feature: Columnar growth form. Bark color goes through a transitional phase from grayish-orange on 3-year-old stems, orange-white on 6-year-old stems to yellow-white on mature trunks. Light Preferences: Full sun to partial shade Soil Preferences: It is very adaptable to both dry and moist locations. It is not particular as to soil type or pH. It is highly tolerant of urban pollution and will thrive in inner city environments. Landscape Attributes: Deer resistant. Dakota Pinnacle® is recommended for vertical accent elements or specimen tree. Supply mulch and supplementary water in stressful sites. Mulch will assist with winter protection in exposed locations or colder zones. Availability: Widely available in the wholesale and retail nursery industry. U.S. Trademark registered, U.S. Plant Patent (PP 10,963) and Canadian Trademark registered.
Family: Cannabaceae Native Range: Central and Northeastern North America Zone: 2 to 9 Height: 40.00 to 60.00 feet. Spread: 40.00 to 60.00 feet Bloom Time: April to May. Sun: Full sun to part shade. Water: Medium to wet. Maintenance: Low Attracts: Birds, Butterflies. Fruit: Edible. Tolerates: Drought, Clay Soil, Wet Soil.
Culture Best grown in moist, organically rich, well-drained soils in full sun. Tolerates part shade. Also tolerates wind, many urban pollutants and a wide range of soil conditions, including both wet, dry and poor soils.
Noteworthy Characteristics
Celtis occidentalis, Hackberry, typically grows with upright-arching branching and a
Botanical name: Ginkgo biloba ‘Princeton Sentry’ Princeton Sentry ginkgo: non-fruiting male form; assumes an upright, nearly columnar form that tapers to a point.
Ginkgo is a very pest-resistant tree. It has interesting, fan-shaped leaves that turn vivid yellow in fall. Only male trees should be purchased as the females produce messy fruit that have a potent odor.
Common Names: ginkgo, maidenhair tree Foliage: Deciduous Native Locale: Non-native in America. Native to China. Mature Height: 50 feet or more. Mature Width: Variable. Growth Rate: Slow. Light Exposure: Full sun (6 hrs direct light daily). Hardiness Zones: Zones 4 – 9. (Laramie is Zone 4.) Soil Preference: Moist, well-drained soil. Tolerates: Dry sites, Occasional drought, Alkaline soil, Clay soil, Road salt. Moderately Tolerant: Soil Salt. Intolerant: Poor Drainage. Transplants Well: Yes
Ornamental Interest: Yellow Fall color. Flower & Fragrance: Inconspicuous. Flower arrangement: Male and female flowers on separate trees (dioecious). Tree & Plant Care Relatively low maintenance. Prune in spring. Disease, pests, and problems: No serious pests or problems. Bark color and texture: The bark is typically light gray, with shallow ridges and furrows. Leaf or needle arrangement, size, shape, and texture: Simple, alternate, fan-shaped leaves in clusters of 3 to 5 on spurs or single on long shoots; usually notched at the tip; 2 to 3 inches long.
Source: the Morton Arboretum https://www.mortonarb.org/trees-plants/tree-plant-descriptions/ginkgo
American elm ‘Princeton’ Ulmus americana 'Princeton'
Photo: www.co.becker.mn.us
Zone: 3 to 9. Height: 50-70 feet. Spread: 30-50 feet. Bloom Time: March to April. Bloom: tiny green. Sun: Full sun. Water: Medium. Tolerates: Drought, Air Pollution Culture Grow in average, medium moisture, well-drained soils in full sun. Tolerant of light shade. Adapts to both wet and dry sites. Generally tolerant of urban conditions. Do not prune during growing season. Do not plant under powerlines.
Noteworthy Characteristics American elm is a vase-shaped, medium to large, deciduous tree. It is native to eastern and central North America. 'Princeton' reportedly has excellent resistance to Dutch elm disease. Non-showy, small green flowers appear in spring before the foliage emerges. Flowers give way to single-seeded, wafer-like samaras (each tiny seed is surrounded by a flattened oval-rounded papery wing). Seeds mature in April-May (possibly early June in Laramie) as the leaves reach full size. Rough-textured, ovate-elliptic, dark green leaves (to 6” long) have toothed margins and asymmetrical bases. Leaves typically turn yellow in fall.
Problems It is susceptible to phloem necrosis which is a disease caused by a phytoplasma that attacks the food-conducting tissue of the tree, usually resulting in a loosening of the bark, wilting, defoliation and death (Not common in Laramie). It is also susceptible to wetwood which is a bacterial disease that results in wilting and dieback. Various wilts, rots, cankers and leaf spots may also occur. Insect visitors include borers, leaf miner, beetles, mealy bugs, caterpillars and scale.
Hardiness Zone: 3 to 7 Height: 25 to 35 ft Width: 25 to 35 ft
Description: 'Crusader' has a compact, round, dense form. It is most notably thornless. Cockspur hawthorns are native to North America. It is tolerant to urban pollution, drought, light shade, and a range of soil conditions, if there is good drainage.
The foliage is dark green, changing to shades of scarlet, purple, and orange in the autumn. White flowers bloom in May. The fruits ripen in fall to a deep red and are eaten by wildlife.
Insect problems include aphids, borers, caterpillars, lacebugs, leafminers, red spider mites, and scales. The major diseases for this plant are cedar-apple rust, cedar-quince rust, and fireblight. Other possibilities include apple scab, cankers, fungal leaf spots, leaf blight, powdery mildew, and twig blight. Pesticides and fungicides are available for use when problems are severe, or you have a high value tree.
Winter King Hawthorn Crataegus viridis ‘Winter King’
Small Ornamental Tree with Outstanding Winter Interest
It would do well anywhere you'd like an ornamental tree but don't have much room. The outstanding feature of your Hawthorn is its winter features. The silver-grey bark tends to peel, revealing an inner peachy-copper hue. This is best exposed after the dark green leaves transform to their golden reds in autumn and fall to the ground. It's in autumn when you'll also notice the ½ inch bright red berries. The berries remain through the winter and are a welcome treat for wildlife. Flowers are clusters of ¾ inch white blossoms with a gentle fragrance. A Hawthorn in your yard during the winter months has the effect of a silvery-grey tree decorated with dangling red berries.