Description
Thuja occidentalis ‘Holmstrup’
Holmstrup Arborvitae
‘Holmstrup’ is a compact cultivar discovered in Holmstrup, Denmark and introduced into commerce in 1951. It is a slow-growing cultivar that grows to 5-8’ tall over the first 10 years, eventually maturing to as much as 10-15’ over time. Plants display a dense narrow-pyramidal shape with attractive rich green scale-like foliage in vertical sprays. Foliage is noted for retaining good green color throughout winter. Seed cones are not particularly showy.
Zone: 3 to 7
Height: 10.00 to 15.00 feet
Spread: 3.00 to 5.00 feet
Bloom Time: Non-flowering
Bloom Description: Non-flowering
Sun: Full sun to part shade
Water: Medium
Maintenance: Low
Suggested Use: Hedge
Leaf: Evergreen
Other: Winter Interest
Tolerate: Clay Soil, Black Walnut, Air Pollution
Thuja occidentalis 'Holmstrup'
Holmstrup Arborvitae
‘Holmstrup’ is a compact cultivar discovered in Holmstrup, Denmark and introduced into commerce in 1951. It is a slow-growing cultivar that grows to 5-8’ tall over the first 10 years, eventually maturing to as much as 10-15’ over time. Plants display a dense narrow-pyramidal shape with attractive rich green scale-like foliage in vertical sprays. Foliage is noted for retaining good green color throughout winter. Seed cones are not particularly showy.
Zone: 3 to 7
Height: 10.00 to 15.00 feet
Spread: 3.00 to 5.00 feet
Bloom Time: Non-flowering
Bloom Description: Non-flowering
Sun: Full sun to part shade
Water: Medium
Maintenance: Low
Suggested Use: Hedge
Leaf: Evergreen
Other: Winter Interest
Tolerate: Clay Soil, Black Walnut, Air Pollution
Malus 'Adirondack' Crabapple
Botanical Name: Malus 'Adirondack'
(NA 54943; PI 499828)
Family: Rosaceae
Hardiness: U.S.D.A. Zone 4 - 8
Development
Five hundred open-pollinated seedlings of Malus halliana were artificially inoculated with fire blight under control conditions. Of the sixty surviving seedlings, several showed field resistance to scab, cedar-apple rust, and powdery mildew when exposed to natural inoculum from heavily infected, susceptible plants during eleven years of field trial. 'Adirondack' was selected from this seedling population in 1974 by Donald R. Egolf and released in 1987.
Significance
'Adirondack' exhibits a combination of many desirable traits that make it a near-perfect crabapple. The narrow obovate, upright-branched growth habit combines with an annual bloom cycle, abundant, small, persistent fruit, slow to moderate growth rate, and multiple disease tolerance that is rare in crabapple. Highly rated for both aesthetics and disease resistance by the International Ornamental Crabapple Society.
Description
Height and Width: 18 feet tall and 16 feet crown width at 20 years.
Habit
Narrow obovate, upright-branched small tree. Maintains upright form with age.
Foliage
Leathery dark green leaves. The foliage is highly tolerant to cedar apple rust, apple scab, and powdery mildew.
Flowers
Annual flowering. Dark carmine buds mature to a lighter red and open to white, waxy, heavy-textured, wide-spreading flowers with traces of red; slightly fragrant.
Fruit
A pome. Abundant, bright orange-red, hard, small (1/2-inch) fruit persist until early winter. Relished by birds after softened by freezing.
Culture
Adaptable to diverse soil, moisture, and climatic conditions. Requires virtually no pruning to maintain its shape nor chemical controls for the common crabapple diseases.
Propagation
Most commercial propagation is by budding or grafting onto compatible rootstocks. Roots easily from softwood cuttings in late spring, under mist, 3000 ppm IBA, in 4 weeks.
Landscape Use
Effective for foundation plantings of buildings or formal gardens; as a specimen for space-limited situations; a strong focal accent in the shrub border or residential garden; park and recreational area screen; roadside or street tree where shade is not important.
Acer × freemanii 'Jeffersred' AUTUMN BLAZE
Common Name: Freeman maple | Type: Tree
Family: Sapindaceae | Zone: 3 to 8
Height: 40.00 to 55.00 feet | Spread: 30.00 to 40.00 feet
Bloom Time: Rarely flowers | Bloom Description: Greenish-yellow to red
Sun: Full sun to part shade | Water: Medium to wet
Maintenance: Low | Suggested Use: Shade Tree, Street Tree, Rain Garden
Leaf: Good Fall | Tolerate: Wet Soil
Culture
Easily grown in average, medium to wet, well-drained soils in full sun to part shade. Prefers moist, acidic soils with good drainage. Established trees have some tolerance for drought conditions.
Noteworthy Characteristics
Acer x freemanii, commonly called Freeman maple, is a hybrid of red maple (A. rubrum) and silver maple (A. saccharinum). The Freeman maple cultivars commonly sold in commerce today reportedly combine some of the best features of both parents, namely, solid structure, attractive form and showy fall color (from red maple) and adaptability and rapid growth (from silver maple). Oliver M. Freeman of the National Arboretum made the first controlled crosses between red maple and silver maple in 1933. Edward Murray named this hybrid cross in 1969 in honor of Oliver M. Freeman. Notwithstanding the foregoing, crosses between red and silver maples occur not only by controlled propagation but also naturally in the wild. It is sometimes difficult to identify a Freeman hybrid because of the complexity of crosses and backcrosses that may occur.
Cultivars are sometimes listed for sale by nurseries under Acer rubrum instead of Acer x freemanii.
Genus name is the Latin name for a maple tree.
Specific epithet and common name honors Oliver Freeman who first grew A. x freemani at the U. S. National Arboretum in 1933.
‘Jeffersred’, sold under the trade name of AUTUMN BLAZE, is an older cultivar that was discovered by nurseryman Glenn Jeffers in the late 1960s. This is an upright, fast-growing, deciduous tree that will typically grow 40-55’ tall with ascending branching and a dense, broad-oval crown. Each medium green leaf is deeply cut with five pointed lobes. As the trade name suggests, the foliage turns into an autumn blaze of orange-red to scarlet-red fall color. Flowers and fruit for this hybrid are very sparse. U.S. Plant Patent PP04,864 issued July 6, 1982.
Problems
No serious insect or disease problems. Young plants susceptible to leafhoppers and scale. Borers.
Amelanchier × grandiflora 'Autumn Brilliance'
Shrub form
Amelanchier x grandiflora is a hybrid cross between two species of North American serviceberry, namely, A. arborea (downy serviceberry) and A. laevis (Allegheny serviceberry). It is known in commerce today by several showy cultivars. This is a small, deciduous, usually multi-trunked understory tree or tall shrub which typically matures to 15-20’ tall. Flowers bloom in April followed by edible fruits (3/8" diameter) in June (hence the sometimes-used common name of Juneberry for amelanchiers). Berries resemble blueberries in taste and may be used in jams, jellies and pies. Finely-toothed, oval-lanceolate leaves (to 3" long) emerge with bronze tints in spring, mature to dark green from late spring throughout summer before finally turning brilliant red to orange-red in fall.
Common Name: apple serviceberry
Type: Tree
Family: Rosaceae
Zone: 4 to 9
Height: 15.00 to 25.00 feet
Spread: 15.00 to 25.00 feet
Bloom Time: April
Bloom Description: White
Sun: Full sun to part shade
Water: Medium
Maintenance: Low
Suggested Use: Flowering Tree
Flower: Showy
Leaf: Good Fall
Attracts: Birds
Fruit: Showy, Edible
Malus 'JFS-KW5' ROYAL RAINDROPS
Common Name: flowering crabapple | Type: Tree
Family: Rosaceae | Zone: 4 to 8
Height: 15.00 to 20.00 feet | Spread: 12.00 to 16.00 feet
Bloom Time: April | Bloom Description: Magenta-pink
Sun: Full sun | Water: Medium
Maintenance: Low | Suggested Use: Flowering Tree
Flower: Showy | Leaf: Colorful, Good Fall
Attracts: Birds, Butterflies | Fruit: Showy, Edible
Other: Winter Interest | Tolerate: Clay Soil, Air Pollution
Culture
Best grown in medium moisture, well-drained, acidic loams in full sun. Adapts to a wide range of soils. Established trees have some drought tolerance. Although some flowers may be lost, it is best to prune this tree as needed in late winter. Spring pruning should be avoided as it produces fresh, open cuts where fireblight bacterium can enter.
Noteworthy Characteristics
Malus is a genus of about 35 species of deciduous trees and shrubs from Europe, Asia and North America.
Genus name from Latin is an ancient name for apple.
‘JFS-KW5’, commonly sold under the trade name of ROYAL RAINDROPS, is an upright-spreading , disease-resistant, easy-to-grow, crabapple tree that features (1) deeply lobed purple foliage (early leaves may be entire) which retains excellent color throughout summer, (2) magenta-pink single flowers in spring (April in St. Louis), (3) tiny maroon-red crabapples (1/4" diameter) that mature in late summer and (4) excellent orange-red fall color. This small tree typically matures to 15-20’ tall and to 12-16' wide with a dense rounded canopy and excellent foliage density. Crabapples persist on the tree into early winter and are an attractive food source for birds. 'JFS-KW5' is an open-pollinated seedling of Malus transitoria 'Schmidtcutleaf'. U.S. Plant Patent PP14,375 was issued on December 16, 2003.
Problems
The main diseases of crabapple are scab, fire blight, rusts, leaf spot and powdery mildew. Potential insect pests are of lesser concern and include tent caterpillars, aphids, Japanese beetles, borers and scale. Spider mites may occur.
ROYAL RAINDROPS has good disease resistance to the main diseases of crabapples.
Celtis occidentalis
Species Native to Missouri
Common Name: hackberry | Type: Tree
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
Bloom Description: Green | Sun: Full sun to part shade
Water: Medium to wet | Maintenance: Low
Suggested Use: Shade Tree, Street Tree, Rain Garden
Flower: Insignificant | Attracts: Birds, Butterflies
Fruit: Edible | Tolerate: Drought, Clay Soil, Wet Soil, Air Pollution
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, commonly called common hackberry, is a medium to large sized deciduous tree that typically grows 40-60’ (less frequently to 100’) tall with upright-arching branching and a rounded spreading crown. Trunk diameter ranges from 1-3’ (less frequently to 4’). This tree is a U.S. native that is widely distributed throughout the east and midwest. It is common in Missouri where it typically occurs statewide in low woods along streams and in drier upland slopes (Steyemark). Mature gray bark develops corky ridges and warty texture. Insignificant, mostly monoecious, greenish flowers appear in spring (April–May), with male flowers in clusters and female flowers solitary. Female flowers give way to an often abundant fruit crop of round fleshy berry-like drupes maturing to deep purple. Each drupe has one round brown seed within. Fruits are attractive to a variety of wildlife. Birds consume the fruits and disperse the seeds. Fleshy parts of the fruit are edible and somewhat sweet. Ovate to oblong-ovate, rough-textured, glossy to dull green leaves (2-5” long) have mostly uneven leaf bases and are coarsely toothed from midleaf to acuminate (sharply pointed) tip. Undistinguished yellow fall color.
Genus name comes from the Greek name for another tree.
Specific epithet means Western.
Problems
Hackberry nipple gall is so common in the St. Louis area that it is often used as an aid in identifying the tree. Although the galls do not hurt the tree, they often significantly disfigure the leaves. Witches’ broom (dwarfed, dense, contorted twig clusters at the branch ends) is also somewhat common. It also does little harm to the tree, but can be quite unsightly. Powdery mildew, leaf spot and root rot may occur. Watch for lacebugs and scale.
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