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Trees, Shrubs, & Groundcovers

Title Summary Date ID Author(s)
Rust and Gall Mites

Galls are abnormal growths of plant tissue induced by insects and other organisms. Gall-making parasites release growth-regulating chemicals as they feed, causing adjacent plant tissues to form a gall. The parasite then develops within the relative security of the gall. Galls come in an endless variety of forms. Many are strikingly colored or curiously shaped. Each gall-making species causes a gall structurally different from all others. By noting the type of host plant and the structure of the gall, one can identify the gall-making mite without actually seeing it.

May 8, 2015 ENTO-147NP
Thining Hardwoods, Demonstration Woodlot

Most forest owners value their forest for wildlife habitat, recreation and aesthetics. Given accurate information, they may manage their woodlot to achieve these and other goals using sound silviculture. Thinning over-stocked woodlots is one silvicultural management tool. Thinning can modify spacing and diversity of species to meet desired goals which may include timber, wildlife, aesthetics and more. Thinning also improves woodlot vigor by removing over-mature, suppressed, defective or weakened trees. To meet theses objective, Stand D2 was selected for a thinning research & demonstration site.

Apr 24, 2015 ANR-133NP (ANR-149NP)
Trees for Problem Landscape Sites -- The Walnut Tree: Allelopathic Effects and Tolerant Plants

Walnut is the common name given to twenty species of deciduous trees in the genus Juglans, of which six species are native to the United States. The black walnut, Juglans nigra, which is native to Virginia, grows from Maine west to southern Michigan and south to Texas and Georgia.

Apr 10, 2015 430-021(HORT-113P)
Trees for Problem Landscape Sites — Screening

Using trees as living screens can easily enhance living and working spaces. Before selecting trees for screening, first determine the screen's purpose, whether functional or environmental. Screening can be used to define an area, modify or hide a view, create privacy, block wind, dust, salt and snow, control noise, filter light, and direct traffic flow.

Apr 9, 2015 430-025 (HORT-117P)
Trees for Problem Landscape Sites — Trees for Hot Sites

Hot landscape sites require special consideration before trees are planted. Trees can survive, and even thrive, in hot sites if the site is prepared correctly, if heat-tolerant species are selected, and if the trees are properly maintained. A variety of different locations and situations qualify as hot landscape sites.

Apr 9, 2015 430-024 (HORT-118P)
Trees for Problem Landscape Sites — Trees for Landscape Containers and Planters

Planting trees in aboveground containers and planters is becoming a common practice on sites that are not suited for inground planting. Containers differ from raised planters in that they are usually smaller in volume and moveable, whereas planters are generally larger, and often built as part of the permanent hardscape (paving, etc.). The greatest challenge in selecting trees for containers and planters is in choosing trees that can survive temperature extremes, and that can establish roots in a limited volume of substrate (potting soil). Consider several factors when selecting containers and trees including environmental influences, container and planter design, substrate type, and tree characteristics.

Apr 9, 2015 430-023 (HORT-119P)
Fertilizing Landscape Trees and Shrubs

Maintenance programs should be developed for trees and shrubs in both residential and commercial landscapes. A good maintenance program includes monitoring and controlling insect and disease problems, suppressing weed competition, and making timely applications of water, mulch, and fertilizer.

Tree and shrub fertilization is especially important in urban and suburban areas of Virginia where soils have been altered due to construction. These urban soils tend to be heavily compacted, poorly aerated, poorly drained, and low in organic matter. Even where soils have not been affected, fertilization may be needed as part of a maintenance program to increase plant vigor or to improve root or top growth.

Apr 9, 2015 430-018 (HORT-120P)
Managing Winter Injury to Trees and Shrubs

It is often necessary to provide extra attention to plants in the fall to help them over-winter and start spring in peak condition. Understanding certain principles and cultural practices will significantly reduce winter damage that can be divided into three categories: desiccation, freezing, and breakage.

Apr 9, 2015 426-500 (HORT-121P)
24 Ways to Kill a Tree Apr 8, 2015 430-210 (HORT-112P)
Trees and Shrubs that Tolerate Saline Soils and Salt Spray Drift Apr 8, 2015 430-031 (HORT-111P)
Trees and Shrubs for Acid Soils

The trees and shrubs on your new home site are growing poorly, so you take samples to the Extension office and the agent suggests a soil test. Test results show that your soil has a pH of 4.5, which is rated as strongly acid. The agent suggests you either take corrective action to raise the pH or grow different plants.

Apr 8, 2015 430-027 (HORT-115P)
Trees for Problem Landscape Sites — Wet and Dry Sites Apr 8, 2015 430-026 (HORT-114P)
Trees for Problem Landscape Sites -- Air Pollution

Conditions in urban environments place trees under numerous stresses including compacted soil, soil moisture extremes, and reduced soil fertility. Polluted air is another stress that contributes to the decline of urban trees. Air pollution may cause short-term (acute) damage, which is immediately visible, and long-term (chronic) damage, which can lead to gradual tree decline. Long-term damage may predispose trees to other disorders, making diagnosis difficult.

Apr 8, 2015 430-022 (HORT-123P)
Selecting Landscape Plants: Conifers Apr 6, 2015 426-605 (HORT-108P)
Selecting Landscape Plants: Broad-Leaved Evergreens Apr 3, 2015 426-607 (HORT-105P)
Selecting Landscape Plants: Shade Trees Apr 1, 2015 426-610 (HORT-104P)
Growing Azaleas and Rhododendrons Mar 30, 2015 426-602 (HORT-103P)
Tree and Shrub Planting Guidelines Mar 3, 2015 430-295 (HORT-106P)
The Art of Bonsai

Bonsai is an art form that stems from ancient Asian culture, originating in China and developed by the Japanese. In the 13th century, the Japanese collected and potted wild trees that had been dwarfed by nature. These naturally formed miniatures were some of the first bonsai.

Mar 3, 2015 426-601 (HORT-158P)
Scale Insects Feb 26, 2015 2808-1012 (ENTO-106NP)
All-Age Management, Demonstration Woodlot

Many forest owners value their forest for wildlife habitat, recreation, and aesthetics. Given accurate information, many want to manage their woodlot using sound silviculture but clear-cutting as a regeneration method may not be visually acceptable. While a profitable timber harvest is of interest, a visually pleasing residual stand may be more important. To meet this objective, Stand D1 of the SVAREC forests was selected to demonstrate All-Age Management using group selection silviculture and individual thinning of select trees to create four age classes.

Feb 23, 2015 ANR-132NP
Problem-free Trees for Virginia Landscapes Feb 18, 2015 450-237 (PPWS-47P)
Problem-free Shrubs for Virginia Landscapes Feb 12, 2015 450-236 (PPWS-48P)
TREE Cookies Etc. Winter 2015 Jan 13, 2015 ANR-139NP
Hiring an Arborist to Care for Your Landscape Trees

Landscape trees are valuable assets to your property and for your community. Keeping your trees attractive, healthy, and safe requires careful attention to their planting and care throughout their lives. While many people have a green thumb, there are situations that arise where the expertise of an arborist is needed to address complex or potentially hazardous tree care needs. The purpose of this publication is to inform home owners, property managers, municipal planners, and others about the tree care services provided by an arborist and the steps that should be taken to hire a qualified arborist.

Dec 18, 2014 ANR-131NP
Virginia Boxwood Blight Task Force May 20, 2014 PPWS-30
Gloomy Scale Sep 25, 2013 ENTO-44NP
How to Plan for and Plant Streamside Conservation Buffers with Native Fruit and Nut Trees and Woody Floral Shrubs Sep 4, 2013 ANR-69P
Yield Potential of Native Warm-Season Grasses Grown in Mixture Jul 19, 2013 CSES-55P
One-Year Health, Mortality, and Growth in Southeast Virginia of Shortleaf Pine From Three Sources Apr 22, 2013 ANR-28P
TREE Cookies Etc. Winter 2011/12 Mar 18, 2013 ANR-62
TREE Cookies Etc. Spring 2010 Mar 15, 2013 ANR-61
TREE Cookies Etc. Fall 2008 Mar 15, 2013 ANR-60
TREE Cookies Etc. Fall 2007 Mar 15, 2013 ANR-59
Integrated Pest Management for Plant Diseases in the Home Garden and Landscape, Learning Module II: The Plant Disease Triangle Apr 22, 2015 PPWS-15NP
Integrated Pest Management for Plant Diseases in the Home Garden and Landscape, Learning Module I: Integrated Pest Management Apr 22, 2015 PPWS-14NP
TREE Cookies Etc. Winter 2012/13 Jan 22, 2013 ANR-33
Rose Rosette Disease Sep 17, 2012 450-620 (PPWS-10P)
Woody Florals for Income and Conservation Aug 30, 2012 ANR-22NP
Native Fruit and Nut Trees and Shrubs of the Virginia Mountains and Piedmont Aug 30, 2012 ANR-23NP
Trees and Water Jul 30, 2012 ANR-18NP
Washington Hawthorn, Crataegus phaenopyrum Feb 27, 2012 HORT-30
Umbrella-Pine (Japanese Umbrella-Pine), Sciadopitys verticillata Feb 27, 2012 HORT-29
Star Magnolia, Magnolia stellata Feb 27, 2012 HORT-28
Sourwood, Oxydendrum arboreum Feb 27, 2012 HORT-27
Scotch Pine, Pinus sylvestris Feb 27, 2012 HORT-26
Sawara Falsecypress (Japanese Falsecypress), Chamaecyparis pisifera Feb 27, 2012 HORT-25
Saucer Magnolia, Magnolia ×soulangeana Feb 27, 2012 HORT-24
River Birch, Betula nigra Feb 27, 2012 HORT-23
Red Buckeye, Aesculus pavia Feb 27, 2012 HORT-22
Paperbark Maple, Acer griseum Feb 27, 2012 HORT-21
Norway Spruce, Picea abies Feb 22, 2012 HORT-20
Mimosa (Silk-tree or Albizia), Albizia julibrissin Feb 22, 2012 HORT-19
Leyland Cypress, ×Cupressocyparis leylandii Feb 22, 2012 HORT-18
Lacebark Pine, Pinus bungeana Feb 22, 2012 HORT-17
Kousa Dogwood, Cornus kousa Feb 22, 2012 HORT-16
Katsuratree, Cercidiphyllum japonicum Feb 22, 2012 HORT-15
Japanese Zelkova, Zelkova serrata Feb 22, 2012 HORT-14
Japanese Stewartia, Stewartia pseudocamellia Feb 21, 2012 HORT-13
Japanese Cryptomeria, Cryptomeria japonica Feb 21, 2012 HORT-12
Hinoki Falsecypress, Chamaecyparis obtusa Feb 21, 2012 HORT-11
Goldenchain tree, Laburnum × watereri Feb 21, 2012 HORT-10
Douglasfir, Pseudotsuga menziesii Feb 21, 2012 HORT-9
Chinese Pistache, Pistacia chinensis Feb 21, 2012 HORT-8
Chinese Elm (Lacebark Elm), Ulmus parvifolia Feb 21, 2012 HORT-7
American (Fagus grandifolia) and European (Fagus sylvatica) Beeches Feb 21, 2012 HORT-6
American Hornbeam, Carpinus caroliniana Feb 21, 2012 HORT-5
Pine Tortoise Scale, Hemiptera: Coccidae, Toumeyella numismaticum Jan 25, 2011 3101-1529
Yuccas, Yucca spp. Nov 3, 2010 3010-1501
Yews, Taxus spp. Nov 3, 2010 3010-1500
White Fringetree, Old-man’s-beard, Chionanthus virginicus Nov 3, 2010 3010-1499
Shore Juniper, Juniperus conferta Nov 3, 2010 3010-1498
Red Twig Dogwoods, Tatarian Dogwood (Cornus alba) and Redosier Dogwood (Cornus sericea) Nov 3, 2010 3010-1497
Oriental Arborvitae, Thuja orientalis (also known as Platycladus orientalis) Nov 3, 2010 3010-1496
Mugo Pine, Pinus mugo Nov 3, 2010 3010-1495
Mountain-Laurel, Kalmia latifolia Nov 3, 2010 3010-1494
Lilacs, Syringa spp. Nov 3, 2010 3010-1493
Japanese Pieris, Pieris japonica Nov 3, 2010 3010-1492
Japanese Pachysandra, Japanese Spurge, Pachysandra terminalis Nov 3, 2010 3010-1491
Japanese Garden Juniper, Juniperus procumbens ‘Nana’ Nov 3, 2010 3010-1490
Heaths (several species of Erica) and Heathers (Calluna vulgaris) Nov 3, 2010 3010-1489
Glossy Abelia, Abelia ×grandiflora Nov 3, 2010 3010-1488
Giant Arborviatae, Western Arborvitae, Thuja plicata Nov 3, 2010 3010-1487
Garden Sumacs, Rhus spp. Nov 3, 2010 3010-1486
Franklinia, Franklinia alatamaha Nov 3, 2010 3010-1485
Flowering Dogwood, Cornus florida Nov 3, 2010 3010-1484
Flowering Crabapple, Malus spp. Nov 3, 2010 3010-1483
Evergreen Hollies, (Ilex spp.) Nov 3, 2010 3010-1482
European Larch, Larix decidua Nov 3, 2010 3010-1481
European Hornbeam, Carpinus betulus Nov 3, 2010 3010-1480
European Cranberrybush Viburnum (Guelder Rose), Viburnum opulus Nov 3, 2010 3010-1479
English Ivy, Hedera helix Nov 3, 2010 3010-1478
Eastern Redcedar, Juniperus virginiana Nov 3, 2010 3010-1477
Eastern Arborvitae, American Arborvitae, White Cedar, Thuja occidentalis Nov 3, 2010 3010-1476
Dwarf Alberta Spruce, Picea glauca ‘Conica’ Nov 3, 2010 3010-1475
Dawn Redwood, Metasequoia glyptostroboides Nov 3, 2010 3010-1474
Creeping Juniper, Juniperus horizontalis Nov 3, 2010 3010-1473
Cornelian Cherry Dogwood, Cornus mas Nov 3, 2010 3010-1472
Common Periwinkle, Lesser Periwinkle, Vinca minor Nov 3, 2010 3010-1471
Colorado Spruce, Picea pungens var. glauca Nov 3, 2010 3010-1470
Chinese Juniper, Juniperus chinensis Nov 3, 2010 3010-1469
Chastetree, Monk’s Pepper Tree, Vitex agnus-castus Nov 3, 2010 3010-1468
Cedars, Cedrus spp. Nov 3, 2010 3010-1467
Carolina Silverbell, Halesia carolina (formerly H. tetraptera) Nov 3, 2010 3010-1466
Canadian Hemlock, Tsuga canadensis Nov 3, 2010 3010-1465
Bradford Callery Pear (and other cultivars) Pyrus calleryana ‘Bradford’ Nov 3, 2010 3010-1464
Bigleaf Hydrangea, Hydrangea macrophylla Nov 3, 2010 3010-1463
Austrian Pine, Pinus nigra Nov 3, 2010 3010-1462
Hemlock Woolly Adelgid Jun 11, 2010 3006-1451
Bacterial Leaf Scorch of Landscape Trees Jan 11, 2010 3001-1433
Characteristics of Common Western Virginia Trees Dec 15, 2014 420-351 (ANR-118NP)
Emerald Ash Borer

Coleoptera: Buprestidae, Agrilus planipennis Fairmaire

Plants Attacked: Emerald ash borer (EAB) attacks all species of ash trees that grow in Virginia. Only Asian species of ash trees have shown any resistance to this pest.

May 1, 2009 2904-1290
Pales Weevil

Pales weevil feeds on all pines within its range. It will also feed, although to a lesser extent, on Douglas-fir, fir, hemlock, juniper, larch, northern white-cedar, and spruce.

Dec 11, 2014 2902-1102 (ENTO-103NP)
Yaupon Holly Cultivars

Summary:

Foliage: Evergreen broadleaf

Height: 5 to 20 feet (depending on cultivar)

Spread: 3 to 10 feet (depending on cultivar)

Shape: Compact mound

This and several other similar cultivars are used in landscapes as border plants or in mass. This species is very tolerant of most adverse landscape conditions. Some female cultivars have stems laden with very showy persistent red fruit. This species is suited to warmer areas of Virginia (zone 7 and higher).

May 1, 2009 2901-1079
Wintercreeper Euonymus

Summary:

Foliage: Evergreen broadleaf 

Height: 4 inches as a ground cover 20 feet as a vine

Shape: Spreading Wintercreeper euonymus is a low-growing evergreen ground cover that will climb when it encounters a vertical surface. There are several cultivars which vary in foliage color and height.

May 1, 2009 2901-1078
Winterberry

Summary:

Foliage: Deciduous broadleaf Height: 10 feet

Spread: 10 feet Shape: Upright oval

Winterberry is a large shrub and somewhat informal in character. There are cultivars that are shorter and have a more formal appearance. This native wetland species has very showy bright red fruit (on female plants) in early autumn that persist till February.

May 1, 2009 2901-1077
White Oak

Summary:

Foliage: Deciduous broadleaf Height: 100 feet

Spread: 80 feet Shape: Broad-rounded

White oak is a magnificent large spreading tree. This species is somewhat slow growing but is well worth the wait. Do not plant this tree in an area that is apt to be subjected to soil compaction.

May 1, 2009 2901-1076
Vanhoutte Spirea

(Spiraea x vanhouttei)

Summary:

Foliage: Deciduous broadleaf Height: 10 feet

Spread: 12 feet Shape: Vase-shaped with arching branches

Vanhoutte spirea is a large shrub with graceful arching branches. Its main claim to fame is it abundant and showy display of white flowers in spring. This species is best used in a shrub border or in mass.

May 1, 2009 2901-1075
Tuliptree

Summary:

Foliage: Deciduous broadleaf

Height: 90 feet

Spread: 50 feet

Shape: Upright oval

Tuliptree is a very tall, large tree with a straight trunk. It bears beautiful tulip-shaped flowers in May but generally go unnoticed since they high in the tree.

May 1, 2009 2901-1074
Thornless Common Honeylocust

(Liquidambar styraciflua)

Summary:

Foliage: Deciduous broadleaf Height: 50 feet

Spread: 30 feet Shape: Pyramidal in youth, round to oval at maturity

Sweetgum is a medium/large tree with very showy fall foliage colors. It tolerates moist to dry soils. A notable disadvantage is the mess created by the fallen spiny fruit (gum balls).

May 1, 2009 2901-1073
Sweetgum

Summary:

Foliage: Deciduous broadleaf Height: 50 feet

Spread: 30 feet Shape: Pyramidal in youth, round to oval at maturity

Sweetgum is a medium/large tree with very showy fall foliage colors. It tolerates moist to dry

soils. A notable disadvantage is the mess created by the fallen spiny fruit (gum balls).

May 1, 2009 2901-1072
Sugar Maple

Summary:

Foliage: Deciduous broadleaf Height: 100 feet

Spread: 80 feet Shape: Oval to round

Sugar maple is a medium/large shade tree with a no less than spectacular fall foliage display.

There are many cultivars; cultivar characteristics include growth rate, form, and fall foliage color.

May 1, 2009 2901-1071
Southern Waxmyrtle

Summary:

Foliage: Deciduous broadleaf Height: 15 feet

Spread: 15 feet Shape: Upright, multi-stem

Southern waxmyrtle is a large evergreen shrub or small tree depending on how one prunes it.

This species tolerates wet and dry soils and females have a somewhat showy display of gray berries in the fall/winter.

May 1, 2009 2901-1070
Southern Magnolia

Summary:

Foliage: Evergreen broadleaf

Height: 80 feet

Spread: 50 feet

Shape: Upright, pyramidal to narrow pyramidal

This is a magnificent large evergreen tree with very large, wonderfully fragrant white flowers in late spring and early summer. There are many cultivars with variations in tree shape and size, flower, and foliage characteristics.

May 1, 2009 2901-1069
Smokebush, Smoketree

Summary:

Foliage: Deciduous broadleaf

Height: 15 feet

Spread: 15

Shape: Upright, spreading

Smokebush is a small tree or large shrub depending on how one prunes the plant. Leaves of the species are green. Depending on cultivar; leaves can be purple or yellow during the growing season. After flowering (with small relatively inconspicuous flowers) in spring, clusters of fine filaments associated with flowering give the appearance of “smoke”. Fall foliage color is quite showy.

May 1, 2009 2901-1068
Scarlet Firethron, Pyracantha

Summary:

Foliage: Evergreen broadleaf Height: 15 +feet Spread: 15 feet

Shape: Spreading – can get wild (sprawling) if not pruned

Pyracantha is a large, fast-growing shrub has showy white blooms in spring and a spectacular display of orange/red fruit in the fall. This plant requires pruning since unpruned plants are very rangy looking. Stems have very sharp thorns, thus pruning this plant must be performed with caution. Plants should be not situated where children or pedestrians may encounter stems.

May 1, 2009 2901-1067
Rose of Sharon, Shrub Althea

Summary:

Foliage: Deciduous broadleaf Height: 10 feet

Spread: 6 feet Shape: Upright

Rose-of- Sharon is a large shrub with showy. Relatively large single or double flowers bloom in summer. Flower colors include white, red, purple, violet, and blue.

May 1, 2009 2901-1066
Evergreen Rhododendron

Summary:

Foliage: Evergreen

Height: 6 to 15 feet (depending on species or cultivar)

Spread: 5 to 15 feet (depending on species or cultivar)

Shape: Upright, rounded to oval

There are many Rhododendron species and cultivars thereof, as well as hundreds of hybrids.

Rhododendron species come in many sizes and shapes with a wide variety of leaf and flower forms. Azaleas are in the Rhododendron genus and will discussed in another article.

May 1, 2009 2901-1065
Red Maple

Summary:

Foliage: Deciduous broadleaf

Height: 60 feet

Spread: 60 feet

Shape: Oval to round

Red maple is a fast-growing medium/large shade tree species with a spectacular fall foliage color. It has showy red flowers in the spring. There are many cultivars of this species that vary in form, tolerance of wet conditions, and fall color.

May 1, 2009 2901-1064
Privet

Summary:

Foliage: Deciduous broadleaf Height: 4 to 15 feet

Spread: 4 to 8 feet Shape: Bushy

Small, green, summer foliage. When unpruned, pyramidal clusters of small white flowers produce black berries.

May 1, 2009 2901-1063
Pin Oak

Summary:

Foliage: Deciduous broadleaf

Height: 70 feet

Spread: 40 feet

Shape: Upright pyramidal in youth, oval at maturity

This large oak has wine-red foliage in the fall.

May 1, 2009 2901-1062
Oregon Grape Holly (Manhonia)

Summary:

Foliage: Evergreen broadleaf

Height: 3 to 9 feet (depending on form)

Spread: 5 feet

Shape: Upright, cane growth (very little side branching)

Oregongrapeholly is a slow-growing, medium to large evergreen shrub with lustrous foliage and bright yellow flowers in spring which are followed by robin egg blue fruit in summer.

May 1, 2009 2901-1061
Old Fashioned Weigela

Summary:

Foliage: Deciduous broadleaf Height: 9 feet

Spread: 12 feet Shape: upright, spreading

Old fashioned weigela is a large shrub with a coarse texture and showy spring flowers. This plant is best suited for a shrub border. There are several new cultivars which are improved versions (dwarf, foliage and flower characteristics) compared to the species.

May 1, 2009 2901-1060
Norway Maple

Summary:

Foliage: Deciduous broadleaf Height: 50 feet

Spread: 50 feet Shape: Oval to round

Norway maple is a medium/large shade tree that is tolerant of adverse conditions. The Virginia Department of Conservation and Resources and the Virginia Native Plant Society have ranked Norway maple as a “moderately invasive species” in the mountain, piedmont, and coastal areas of Virginia.

May 1, 2009 2901-1059
Nandina, Heavenly Bamboo

Summary:

Foliage: Evergreen or semi-evergreen broadleaf

Height: 10 feet Spread: 5 feet

Shape: Upright, cane growth (very little side branching)

Heavenly bamboo is a medium-large upright shrub. In late spring it bears showy white flowers and in the late fall/winter it has attractive reddish foliage (sun) and large clusters of red berries. This species can tolerate full sun or full shade and is drought tolerant. There are several dwarf cultivars that are suitable for small spaces.

May 1, 2009 2901-1058
London Planetree

Summary:

Foliage: Deciduous broadleaf

Height: 100 feet

Spread: 80 feet

Shape: Pyramidal in youth, spreading with age

London planetree is a medium/large species that is very tolerant of adverse conditions. It has ornamental which bark flakes off, exposing tan, greenish and creamy white colors.

May 1, 2009 2901-1057
Live Oak

Summary:

Foliage: Evergreen broadleaf

Height: 40 feet

Spread: 60 feet

Shape: Spreading

A massive and majestic shade tree with evergreen foliage that is bright olive-green when new and changes to a glossy, dark green when mature.

May 1, 2009 2901-1056
Littleleaf Linden

Summary:

Foliage: Deciduous broadleaf

Height: 70 feet

Spread: 40 feet

Shape: Upright oval

This medium tree has wonderfully fragrant flowers in June and is tolerant of adverse conditions.

May 1, 2009 2901-1055
Leatherleaf Viburnum

Summary:

Foliage: Evergreen broadleaf

Height: 15 feet

Spread: 15 feet

Shape: Upright, multi-stem shrub

This large shrub has dark green leaves that are large, slender, and wrinkled. This species has showy white flowers in late spring. Clusters of red to black berries form (inconsistently) in late summer.

May 1, 2009 2901-1054
Japanese Pagodatree, Sophora

Summary:

Foliage: Deciduous broadleaf

Height: 75 feet

Spread: 75 feet

Shape: Oval to round, spreading

Japanese pagodatree is a medium/large shade tree with showy flowers in summer. Green seed pods, somewhat ornamental, hang on tree until late in the fall. Flower petals can be messy if tree is used near a house, road, or pathway.

May 1, 2009 2901-1053
Japanese Holly

(Ilex crenata)

Summary:

Foliage: Evergreen broadleaf

Height: 2 to 10 feet (depending on cultivar)

Spread: 2 to 10 feet (depending on cultivar)

Shape: Upright or low mound (depending on cultivar)

There are numerous cultivars of Japanese holly. Many are compact, mounded forms with small, spineless, dark-green leaves and black fruit. They are primarily used in mass for borders, backgrounds, and foundation plants.

May 1, 2009 2901-1052
Japanese Camillia

(Camellia japonica)

Summary:

Foliage: Evergreen broadleaf

Height: 15 feet

Spread: 10 feet

Shape: Upright, dense Japanese camellia is a dense and formal-appearing large shrub/small tree suitable for USDA plant hardiness zones 7 to 9. Foliage is a glossy, dark-green. Large flowers, ranging from white to pink to red, bloom from winter to spring.

May 1, 2009 2901-1051
Japanese Barberry

(Berberis thunbergii var. atropurpurea )

Summary:

Foliage: Deciduous broadleaf

Height: 3 to 8 feet (depending on cultivar)

Spread: 4 to 7 feet (depending on cultivar)

Shape: Upright mound

This medium to large shrub has purple foliage throughout the growing season. Japanese barberry has thorns which may be an advantage (deer proof, pedestrian traffic control) or a liability (injury to pedestrians).

The Virginia Department of Conservation and Resources and the Virginia Native Plant Society have ranked this as a “moderately invasive species” in the mountain, piedmont, and coastal areas of Virginia.

May 1, 2009 2901-1050
Japanese Maple

(Acer palmatum)

Summary:

Foliage: Deciduous broadleaf. Foliage color, depending on cultivar, varies from green to red to purple to a marble pattern composed of varying combinations of white, pink and shades of green. Foliage shape can vary from the “normal” looking leaf to dissected (leaves with very thin lobes often referred to a “cut leaf” forms). Dissected leaves impart a very lacy look and fine texture to plants. Spring and fall foliage colors are quite vibrant and can be bright red, yellow, chartreuse, or maroon. Red-leaved cultivars will have green leaves if grown in the shade.

May 1, 2009 2901-1049
Green Ash

(Fraxinus pennsylvanica)

Summary:

Foliage: Deciduous broadleaf Height: 60 feet

Spread: 50 feet Shape: Spreading

This large fast-growing tree is very tolerant of adverse conditions. Its fall foliage color is a yellow.

May 1, 2009 2901-1048
Goldenraintree

(Koelreuteria paniculata)

Summary:

Foliage: Deciduous broadleaf

Height: 40 feet

Spread: 30 feet

Shape: Upright rounded

Goldenraintree is a medium tree with showy yellow flowers in early summer. Flowers are followed by bladder-like fruits that start out light green, turn yellow, and then brown. Fall color can be fair to good depending on the individual tree. This species is quite tolerant of adverse conditions.

May 1, 2009 2901-1047
Ginkgo, Maidenhair Tree

(Ginkgo biloba)

Summary:

Foliage: Deciduous broadleaf Height: 80 feet

Spread: 40 feet Shape: Spreading, a lot of variation in the species

Ginkgo is a large shade tree that is tolerant of adverse growing conditions and has a bright yellow fall foliage color. One should only plant male trees since female trees bear fruit that smell like vomit.

May 1, 2009 2901-1046
Fraser Photinia, Red Tip

(Photinia x fraseri)

Summary:

Foliage: Evergreen broadleaf Height: 20 feet

Spread: 10 feet Shape: Upright

Red tip is a large evergreen shrub. Newly emerging foliage is red and quite showy for a few weeks after which it changes to glossy, dark green. Clusters of white flowers occur in late spring. This plant is widely used in the south as a hedge. Unfortunately, this plant is overused in the landscape and is also susceptible to a serious leaf spot disease.

May 1, 2009 2901-1045
Flowering Quince

(Chaenomeles speciosa)

Summary:

Foliage: Deciduous broadleaf Height: 10 feet

Spread: 12 feet Shape: Upright

Flowering quince is a large fast-growing shrub whose main merit is showy flowers (red, orange, white, pink depending on cultivar) in early spring. Uses of this species include hedge, shrub border, or mass plantings. Plants have thorns and therefore need careful placement.

May 1, 2009 2901-1044
European White Birch

(Betula pendula)

Summary:

Foliage: Deciduous broadleaf Height: 40 to 50 feet

Spread: 25 to 35 feet Shape: Upright

European white birch is a small/medium fast-growing tree with showy white bark and pendulous branch tips (especially when bearing seed). Small, glossy-green summer foliage turns yellow in fall exposing ornamental white bark. This species is considered to be short lived due its susceptibility to pests.

May 1, 2009 2901-1043
Drooping Leucothoe

(Leucothoe fontanesiana)

Summary:

Foliage: Evergreen broadleaf

Height: 6 feet

Spread: 6 feet

Shape: Mound with arching branches

Drooping leucothoe is a beautiful and graceful evergreen medium-sized shrub with lustrous, dark green foliage. White bell-shaped flowers bloom in the spring. Its arching branches give it a fountain-like effect. This plant is not suitable for sunny or dry locations.

May 1, 2009 2901-1042
Doublefile Viburnum

(Viburnum plicatum var. tomentosum)

Summary:

Foliage: Deciduous broadleaf

Height: 10 feet

Spread: 12 feet

Shape: Upright with horizontal branching pattern

Doublefile viburnum is a large wide spreading shrub with a horizontal branching habit and a spectacular flower display in spring.

May 1, 2009 2901-1041
Crapemyrtle

(Lagerstroemia indica)

Summary:

Foliage: Deciduous broadleaf

Height: 4 to 25 feet (depending on cultivar)

Spread: 5 to 20 feet (depending on cultivar)

Shape: Upright or mound (depending on cultivar)

Glossy, dark green foliage turns yellow, orange, and red in fall. Flowers may be white, pink, red, or purple. Exfoliating bark is ornamental.

May 1, 2009 2901-1040
Cotoneaster

(Cotoneaster species)

Summary:

Foliage: Deciduous broadleaf (some species are evergreen)

Height: 12 inches to 6 feet

Spread: 2 to 8 feet

Shape: Spreading or upright

Leaves are small and glossy green. Showy small, white/pink, spring flowers are followed by red or black fruit which cover branches in the fall. The fruit display can be quite showy.

May 1, 2009 2901-1039
Cherrylaurel

(Prunus laurocerasus `Otto Luyken')

Summary:

Foliage: Evergreen broadleaf

Height: 4 feet

Spread: 8 feet

Shape: Spreading

The species (Prunus laurocerasus) is generally not sold in the U.S. Cultivars of cherrylaurel are low-growing with handsome glossy foliage and white flowers in spring. This species tolerates shade and is used as a border, hedge, and in mass.

May 1, 2009 2901-1038
Beautybush

(Kolkwitzia amabilis)

Summary:

Foliage: Deciduous broadleaf

Height: 15 feet

Spread: 8 feet

Shape: Upright, arching

The primary and sole attractive aspect of beautybush is a stunning mass of pink, bellshaped flowers in spring.

May 1, 2009 2901-1036
Evergreen Azalea

Summary:

Foliage: Evergreen broadleaf

Height: 3 to 8 feet (depending on cultivar)

Spread: 4 to 8 feet (depending on cultivar)

Shape: Upright, spreading

There are hundreds of evergreen azalea cultivars which vary in hardiness, size, form, flower color, time of flowering, and foliage. The primary attractive feature of azaleas is the very attractive and showy flower display in spring.

May 1, 2009 2901-1035
American Yellowood

(Cladrastis kentukea (prior name C. lutea))

Summary:

Foliage: Deciduous broadleaf

Height: 50 feet

Spread: 55 feet

Shape: Vase-shaped

This vase-shaped medium tree has smooth bark and showy white flowers in the spring. It is also quite drought and alkaline soil tolerant.

May 1, 2009 2901-1034
American Beautyberry

 

(Callicarpa americana)

Summary:

Foliage: Deciduous broadleaf

Height: 10 feet

Spread: 6 feet

Shape: upright informal habit.

The primary and sole attribute of beautyberry, a large loosely branched shrub, is the showy display of magenta fruits in the fall.

May 1, 2009 2901-1033
Fusarium Wilt of Mimosa (Albizia julibrissin)

Fusarium wilt is a common and lethal disease of mimosa (Albizia julibrissin)1, also commonly known as silktree. In the United States this disease occurs in the east from New York southward and also in Louisiana, Arkansas and California. Fusarium wilt is caused by the fungus Fusarium oxysporum forma specialis perniciosum. Albizia spp. are the only known host of F. oxysporum'' f.sp. ''perniciosum''. Fusarium oxysporum f. sp. perniciosum colonizes and clogs the tree’s vascular (water-conducting) tissue, and interferes with the movement of plant sap. This results in relatively rapid tree death.

Jan 20, 2015 2811-1020(PPWS-53NP)
Fall Webworm

Native to North America, the fall webworm occurs throughout the United States and southern Canada. Its hosts include more than 100 species of deciduous forest, shade, and fruit trees, with preferences varying from region to region.

Nov 21, 2014 2808-1013 (ENTO-94NP)
Cottony Maple Scale

Cottony Maple Scale (Homoptera: Coccidae), Pulvinaria innumerabilis

PLANTS ATTACKED: Maples and dogwood primarily, but also many woody ornamentals.

Nov 14, 2014 2808-1011 (ENTO-89NP)
Dogwood Borer
Larvae feed in the inner bark of live, healthy dogwood trees. The damaged area of the trunk or branch swells and eventually the bark will fall off. Leaves turning red prematurely in mid-summer on a lone branch are an early sign of dogwood borers. Infested branches and limbs will die. Dogwood borers often will not kill the tree in the first year, but reinfestation in successive years will. Plants attacked include: Dogwood, pecan, elm, hickory, and willow.
Nov 18, 2014 2808-1010 (ENTO-90NP)
Bagworm Nov 3, 2014 2808-1008 (ENTO-83NP)
Trees and Shrubs for Overhead Utility Easements

Trees are valuable assets in commercial, private, and public landscapes. Trees add aesthetic beauty, modify and enhance the environment, serve architectural and engineering functions, and increase property and community economic values. These same trees that enhance landscapes, however, are a major challenge for utility companies. Most people have grown accustomed to reliable, uninterrupted electric, telephone and cable service in their homes and offices. Unfortunately, trees are one of the major causes of power outages in areas of overhead utility lines due to direct tree contact with lines, or to trees or tree limbs falling on the lines.

May 1, 2009 430-029
Trees for Parking Lots and Paved Areas

Parking lots and paved areas are essential urban features that tend to be unsightly in their basic form. Municipal ordinances often mandate specific amounts of parking for different types of commercial or residential land use, as well as landscaping for these parking areas. Landscaping in and around parking lots and pavement improves appearance, prevents soil erosion, and reduces carbon dioxide through photosynthesis. Planted areas also reduce storm water drainage problems, reduce the detrimental effects of wind and noise, and enhance human comfort by providing heat-reducing shade.

May 1, 2009 430-028
Invasive Exotic Plant Species: Honeysuckle (Lonicera spp.) Jan 20, 2015 420-323(ANR-124P)
Invasive Exotic Plant Species: Ailanthus (Ailanthus altissima) May 4, 2015 420-322(ANR-122P)
Invasive Exotic Plant Species: Autumn Olive (Elaeagnus umbellata)

Autumn olive was introduced to the U.S. from Japan and China in 1830. It was originally planted for wildlife habitat, shelterbelts, and mine reclamation, but has escaped cultivation. It is dispersed most frequently by birds and other wildlife, which eat the berries.

Dec 3, 2014 420-321 (ANR-123P)
Shortleaf Pine: An Option for Virginia Landowners May 1, 2009 420-165
Verticillium Wilt of Shade Trees May 1, 2009 450-619
Sooty Mold of Conifers and Hardwoods May 1, 2009 450-618
Phytophthora Root Rot of Rhododendron and Azalea May 1, 2009 450-615
Foliar Diseases of Dogwood May 1, 2009 450-611
Fire Blight of Ornamentals May 1, 2009 450-610
Entomosporium Leaf Spot of Photinia May 1, 2009 450-609
Crown Gall of Woody Ornamentals May 1, 2009 450-608
Black Root Rot of Japanese Holly May 1, 2009 450-606
Azalea Leaf and Flower Gall May 1, 2009 450-605
Anthracnose - A Fungal Disease of Shade Trees May 1, 2009 450-604
Powdery Mildew of Ornamental Plants May 1, 2009 450-603
Botrytis Blight of Peony May 1, 2009 450-602
Juniper Tip Blights May 1, 2009 450-601
A Guide to Successful Pruning, Shrub Pruning Calendar May 1, 2009 430-462
A Guide to Successful Pruning, Evergreen Tree Pruning Calendar
Legend:
* = Best time to prune
x = Do not prune except to correct damage, hazards, or structural defects
- = Timing is not critical

Note

  1. Seldom needs pruning - remove multiple leaders, dead and broken branches
  2. Don't prune into old wood having no leaves or needles
  3. Prune during growing season to make more compact or dense
  4. To avoid reducing berry production, don't prune during bloom period
  5. Prune to prevent oak wilt infection
  6. Prune to remove cankers
  7. Flower buds set on previous season (old) wood; winter pruning will reduce spring flowering
May 1, 2009 430-461
A Guide to Successful Pruning, Decidous Tree Pruning Calendar
Deciduous Tree Pruning CalendarLegend:
* = Best time to prune
x = Do not prune except to correct damage, hazards, or structural defects
- = Timing is not critical

Note
  1. Seldom needs pruning - remove multiple leaders, dead and broken branches

  2. Avoid pruning in late winter/early spring due to sap flow (more cosmetic than detrimental)
  3. Avoid pruning from spring through summer due to insect or disease problems
  4. Avoid pruning from October - December due to reduced cold hardiness
  5. Avoid pruning after July because flower buds have set
May 1, 2009 430-460
A Guide to Successful Pruning, Pruning Shrubs

Understanding the natural "habit" or shape of shrubs will help you determine how to prune them. All shoots grow outward from their tips. Whenever tips are removed, lower buds are stimulated to grow. Buds are located at nodes, where leaves are attached to twigs and branches. Each node produces from one to three buds, depending on shrub species.

May 1, 2009 430-459
A Guide to Successful Pruning: Stop Topping Trees!

Topping occurs when the vertical stem (leader) and upper primary limbs (scaffold branches) on mature trees are cut back to stubs at uniform height. Topping is also referred to as heading, stubbing, or dehorning.

May 1, 2009 430-458
A Guide to Successful Pruning, Pruning Evergreen Trees

Evergreen trees have leaves that persist year round, and include most conifers and some broad-leaved trees. Evergreen trees generally need less pruning than deciduous trees.

Conifers are distinguished from other plants by their needle or scale-like leaves, and their seed-bearing cones. Because conifers have dominant leaders, young trees rarely require training-type pruning. The leader is the vertical stem at the top of the trunk. If a young tree has two leaders, prune one out to prevent multiple leader development. Selective branch removal is generally unnecessary as evergreens tend to have wide angles of attachment to the trunk.

May 1, 2009 430-457
A Guide to Successful Pruning, Pruning Deciduous Trees

Trees that shed their leaves annually are classified as deciduous. Before getting out your hand pruners, learn some basics about the anatomy, or supporting framework, of a deciduous tree.

The above-ground part of a tree consists of the trunk, scaffold branches, and lateral branches. The leader is the vertical stem at the top of the trunk. Scaffold branches are primary limbs that form a tree's canopy. Secondary branches that emerge from scaffold branches are laterals. Growth comes from buds at the tips of branches (terminal buds), or along branch sides (lateral buds).

May 1, 2009 430-456
A Guide to Successful Pruning: Pruning Basics and Tools

Pruning is a regular part of plant maintenance involving the selective removal of specific plant parts. Although shoots and branches are the main targets for removal, roots, flower buds, fruits and seed pods may also be pruned.

Pruning wounds plants, but plants respond differently to wounding than do animals. In plants, damaged areas are covered by callus tissue to close wounds. Simply put: animal wounds heal, plant wounds seal.

May 1, 2009 430-455
Pruning Crapemyrtles

One of Virginia’s most popular yet mistreated landscape plants is the beautiful crapemyrtle (Lagerstroemia indica, L. fauriei, and L. indica with L. fauriei or L. speciosa hybrids ). Selected and prized for their long summer bloom period (often called the "plant of the 100 day bloom"), cultivars have a range of flower colors, with an interesting seed head following the flower. In addition, crapemrytles have lustrous green leaves that change to bright fall colors, subtle to stunning multicolored bark, and unique winter architecture that makes this plant exceed most landscape choices for four-season interest and appeal.

May 1, 2009 430-451
Selection and Use of Mulches and Landscape Fabrics

The term “mulch” refers to materials spread or left on the soil surface as protective layers, whether organic or inorganic, loose particles or sheets.

Mar 20, 2015 430-019 (HORT-132P)
Planting Trees

Aesthetics. Trees are creatures of beauty and grandeur. They offer beauty in each season with their form, bark, foliage, flowers, fruit, and sometimes fragrance.

In addition to their seasonal variations, they change in size and character over time. Some trees will become quite large and are magnificent just for their size, irrespective of their species.
May 1, 2009 426-702
Shrubs: Functions, Planting, and Maintenance

What is a shrub? A shrub is generally considered a multi-stem woody plant that is less than 15 feet tall. Of course, this and other plant size categories are definitions contrived by humans to categorize nature. What is the difference between a large shrub and a small tree? In many cases, there is none. A shrub does not become a tree just because it grows higher than 15 feet. Classifying plants into ground cover, shrub, and tree designations are aids to allow us to conveniently classify and describe plants, albeit with a significant amount of ambiguity.

May 1, 2009 426-701
Selecting Landscape Plants: Flowering Trees

In the home landscape, flowering trees are secondary in importance to shade trees. The basic elements of framing, background, and shading are provided by shade trees, while flowering trees provide showy and unusual features with their floral beauty and seasonal interest. In addition, many flowering trees have colorful or interesting fruits which may be edible or attractive to birds.

May 1, 2009 426-611
Selecting Landscape Plants: Groundcovers

Ground covers are low-growing plants that spread quickly to form a dense cover. They add beauty to the landscape and, at the same time, help prevent soil erosion. Grass is the best known ground cover, but grass is not suited to all locations. Other ground cover plants should be used where grass is difficult to grow or maintain.

Nov 29, 2012 426-609 (HORT-31P)
Selecting Landscape Plants: Rare and Unusual Trees

There are many tree species that can be successfully grown in Virginia, but are rarely seen in our landscapes. Although not ordinarily recommended or readily available, these trees may be useful to carry out a specific landscape theme, to substitute for an exotic type which is not locally adapted, or may be prized for unusual form, flowers, fruits, bark, or foliage.

May 1, 2009 426-604
Selecting Landscape Plants: Boxwoods

Boxwood is used extensively in the landscape development of homes, gardens, and public grounds in Virginia. Since colonial times, it has been an integral part of the landscape, and many historical gardens in the state are noted for their boxwoods. Today, many people who have colonial architecture select this plant because they feel it fits this style best, but boxwood is also being used with modern or contemporary homes.

Feb 5, 2013 426-603 (HORT-45P)
Invasive Exotic Plant Species Identification and Management Mar 18, 2015 420-320(AREC-106P)
Soil Test Note 20: Home Shrubs and Trees May 1, 2009 452-720