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.
Flowering trees must fit into the landscape. Only after deciding where they can be used most effectively should you try to select the variety to be used. If a certain type of flowering tree is desired, make the necessary changes to fit it into the landscape rather than simply placing it in the first open space.
Use relatively few flowering trees in the landscape. A small, residential property usually needs only two or three trees. Rows, large masses, and formal designs can be used more readily on estates or commercial properties.
Give consideration to those trees with other striking features. Some trees which do not have spectacular flowers compensate by providing brightly colored or persistent fruits, pods, fall leaf color, bark, or uniquely colored summer foliage.
Whether a tree is considered a flowering tree is often a matter of opinion. All trees produce flowers, but whether we value them for the blossoms depends on how colorful, spectacular, or unusual they are. Few large trees are noted for their flowers. While their flowers may be noticeable, large trees usually are valued more for other reasons. Therefore, some of these are not listed in this publication but are described in VCE Publication 426-610, Selecting Landscape Plants- Shade Trees.
Fruiting characteristics and site selection should be considered together. Soft-fruited trees and those which attract birds create periods of inconvenience when they drop fruit and create litter problems on paved surfaces such as patios, walks, driveways, or game-courts.
Environmental Responses. Whether a flowering or fruiting tree lives up to its potential for health and beauty is largely dependent upon its environment: soil, water, light, and surrounding buildings and vegetation. Purchase flowering trees on the basis of their expected behavior under the prevailing growing conditions unless these conditions can be changed significantly.
Few trees tolerate wet or very heavy soils. Very sandy or gravelly soils cause problems for trees as well; they tend to remain too dry. Nearly all trees, however, respond favorably to deep and fertile topsoil with good internal drainage. When the soil is inhospitable, try to identify species that will tolerate that problem or add good soil in raised beds to help ensure that trees will thrive and flower well.
Flowering and fruiting are greatly influenced by duration and intensity of sunlight. Most flowering trees are adapted to full sunlight and perform better away from buildings or trees which cast dense shade during most of the day. Those preferring shade flower best where there is partial shade all day, or at least in the afternoon.
The form of most trees is variable, depending on the location. Planted in groups or in small openings, they will assume a form more upright than average. Trees planted in open areas will develop a broader crown and will not reach the same height as specimens that are crowded.
Availability and Adaptability. Our range of choices among flowering trees is largely determined by their general adaptability to the area. The climatic range over which a tree will thrive and flower well is usually reflected in the species or varieties offered in local retail nurseries and garden centers.
In the following list of recommended flowering trees, it is as impractical to list all the superior species and varieties as it is impossible for every nurseryman to stock all of them. Every retailer will have some desirable varieties not listed here. On the other hand, not all dealers will have all those listed. When your dealer does not have the plant you want, he can usually obtain it for you if you are patient, or he may suggest a substitute.
Several trees which qualify as flowering trees are not available in the nursery trade or may have limited uses in the landscape. Many of those considered useful but perhaps worth seeking for special reasons are listed in VCE Publication 426-604, Selecting Landscape Plants, Unusual Trees.
A few of the outstanding native trees of Virginia are included in the list. These are not all readily available in the nursery trade at present. One reason for their appearance here is to encourage their preservation and incorporation into the landscape where they occur naturally. Another reason is to encourage use of some of our highly desirable, hardy, and well-adapted flowering trees in Virginia landscapes.
In the following descriptions, the term hardy refers only to the extent to which trees survive the lowest winter temperatures. Most of the trees listed are hardy statewide.
Heights of trees are given for mature specimens grown on superior soils and within a favorable climatic range. Generally, it takes many years to achieve such growth. In less favorable soils and climates, the trees will grow more slowly and these heights may never be reached.
Where fruits are indicated, an arbitrary size range is assigned. Fruits ranging up to 3/8 inch in diameter are termed small. Between 3/8 inch and 3/4 inch they are called medium. Large fruits are larger than 3/4 inch.
The original species grows to 30 feet and is native to China, while the variety 'Bradford' grows to 40 feet. Both are fast growing and pyramidal when young, but with age become upright or rounded. Before the foliage appears, the branches are laden with fragrant, white flowers which later produce small, russet-colored fruit about the size of a marble. The glossy foliage becomes orange to scarlet to deep crimson in fall. It is an excellent lawn, specimen, or street tree. Avoid using it in narrow areas, if possible. The 'Bradford' variety, with its dense, handsome foliage on a highly formal tree, has few pests and is hardy statewide. It is tolerant of all but wet or very poor soils and is somewhat resistant to fireblight. Unfortunately, 'Bradford' has major problems with narrow crotch angles and breakage and has fallen into disfavor. The smaller sizes are best for transplanting. Other good cultivars to consider with different forms include 'Aristocrat,' 'Whitehouse,' 'Capitol,' 'Chanticleer,' and 'Redspire.'
Rounded with dense, ascending branches, this shrub-like but vigorous tree eventually reaches 20 feet in height. Clusters of small, yellow flowers appear before the lustrous foliage, which turns red in fall. The fruit is medium to large, maroon-red, cherry-like, edible, and attractive to birds. Use as a specimen or in groups or borders. It prefers excellent soil, is hardy, and relatively pest-free.
Crab apples are among the most popular flowering trees. Not only are they splendid in bloom but also versatile in tree form and growth habit. Some are also prized for their attractive or persistent fruits which attract birds. There are more than 200 named varieties of crab apple.
The choice to use crab apples in the landscape should be accompanied by a willingness to attend to their maintenance if their full value as ornamentals is to be realized. Pruning is necessary to maintain the proper growth habit. Apple scab, cedar apple rust, and fireblight are all serious diseases of crab apples which require some control; try to use disease-resistant cultivars. Powdery mildew can be a fall disease problem, and cankers may develop where equipment makes wounds in the trunk. Chewing and scale insects, borers, and even mice (in weedy or brushy areas) will sometimes attack the tree. Diseases can be prevented and insects controlled by following the spray schedule described for apple trees in VCE Publication 456-018, Pest Management Guide For Home Grounds And Animals.
There are numerous varieties that have been selected as among the best, based on their disease resistance and ornamental characteristics. Contact your local VCE extension agent for recommendations of varieties. Crabapples may not perform as well in the Tidewater areas where summers are hot and dry.
Among the many flowering cherries, only a few are both spectacular and reliable enough for use throughout Virginia. They serve as specimens, accents, borders, or in groups. Most are slow growing. They respond well to good soil or soil improvement and tend to decline in vigor on poor or heavy soils. Cherries will not tolerate wet soils. The fruits of most flowering cherries are hardly considered ornamental but are very attractive to birds. Attention must be given to pruning, fertilization, and borer control.
Double-Flowered Mazzard Cherry--This dense, pyramidal tree grows to 40 feet and is hardy statewide. The double, white flowers last for 7-10 days, and the medium-sized, edible fruit is attractive to birds.
Higan Cherry--A dense, rounded tree, this variety reaches 30 feet in height. The light-pink flowers may be single or double and produce small, black, inconspicuous fruits. A pendulous, weeping variety is the most popular.
'Kwanzan' Cherry--The hardiest and most reliable form of Oriental Cherry, this variety has double, pink flowers and an upright growth habit that stays under 30 feet.
Sargent Cherry--The dense, upright growth habit of this tree reaches 50 feet. It is hardy statewide, with bronze-colored foliage in spring that turns green in summer and red in fall. The deep-pink, single flowers produce small, black, inconspicuous fruit. A narrow, columnar variety, 'Columnaris,' is also available.
Yoshino Cherry, Prunus x yedoensis--This tree has pink or white flowers and upright to spreading branches reaching from 25 to 50 ft. high. This flowering cherry is hardy throughout Virginia. Several cultivars, including a weeping form, are available.
Unquestionably the most popular of our native flowering trees, the dogwood is the official state tree of Virginia.
Its growth habit is rounded to upright with open, horizontal branching. The growth rate is slow to moderate, eventually reaching 30 feet. The tree is covered with white bracts surrounding small yellow flowers before the leaves appear. Red, glossy, medium-sized fruits persist in the fall when the foliage turns a lustrous scarlet. It is used as a specimen, in masses, or naturalized under large trees. Dogwoods prefer deep soil that is moist but well-drained. Avoid hot, dry exposures and improve tight or shallow soils. More dogwoods die from being wrongly planted in full sun in dry, compacted soil than from any other cause, especially in the Tidewater area. Always apply a mulch, and water during periods of drought. Old or injured specimens are subject to borer damage. Some of the more interesting varieties:
'Apple Blossom'--apple-blossom-pink flowers
'Cherokee Chief'--red flowers, new leaves reddish
'White Cloud'--white, flowering at an early age
The Stellar® hybrids (crosses of C. florida and C. kousa) are more vigorous than their parents, and also more resistant to both dogwood borer and dogwood anthracnose. These hybrids have been patented, trademarked, and DNA fingerprinted; they are essentially sterile. The habit of young trees is more open, though flower bud set is not as heavy as the better forms of C. florida. Leaves are dark green and heat resistant in summer, turning reddish- purple in the fall. The cold hardiness has not yet been extensively tested.
C. 'Rutlan' Ruth Ellen® -- low spreading growth habit, branched to ground; showy, white, brilliant flower display
C. 'Rutfan' Stardust® -- low, horizontal form, heavily branched to ground; white flower bracts are distinctly separate, obovate with an acute tip
C. 'Rutcan' Constellation® -- erect growth habit, low branching; white floral bracts have acute tip, showy display
C. 'Rutdan' Celestial® -- vigorous, erect growth habit; bracts are pointed, white with green tinge, form a cup early in the season and flatten to pure white in several days
C. 'Rutban' Aurora® -- vigorous, uniformly erect growth habit; white flowers with thick, velvety texture, turning cream with age, bract margins typically overlap
C. 'Rutgan' Stellar Pink® -- vigorous, erect growth habit, low branching; rounded, overlapping, textured, pink bracts not as showy as dark red bracts of C. florida
New cultivars include some with even deeper reddish-pink flowers, variegated leaves, or weeping growth habits.
The peach is a vase-shaped to spreading tree with a height up to 25 feet. Single, pink flowers appear before foliage on the previous season's shoots. The tree is fast-growing on good soils but loses vigor rapidly if not properly pruned, fertilized, and protected against pests. Its chief enemy is the peach tree borer, though several other insect and fungus pests dictate occasional or regular spraying. The peach will not tolerate wet or excessively heavy soils. Several very handsome flowering varieties have been propagated. Among the outstanding are:
'Double White' -- profuse, double, white flowers
'Helen Borchers' -- extra large, single, pink flowers
'Late Double Red' -- double red, avoids frost well
'Peppermint Stick' -- double white with pink stripes
'Royal Redleaf' -- good flowering, bright-red foliage early, bronze-green later
'Weeping Double Pink' -- pendulous branches
'Weeping Double Red' -- pendulous branches
A 60-foot evergreen tree in the south, the sweet bay is shrub-like and deciduous near its northern limits. It is most commonly used in southeastern Virginia and tolerates wet soils, but thrives on well-drained soils. Attractive foliage, gray bark, and fragrant, white flowers in early summer make this an excellent specimen or lawn tree. For best results, transplant in the spring.
This publication adapted for Virginia from Selecting Landscape Plants- Flowering Trees, with permission from Lower and Long, Department of Horticulture, University of Missouri.
Virginia Cooperative Extension materials are available for public use, re-print, or citation without further permission, provided the use includes credit to the author and to Virginia Cooperative Extension, Virginia Tech, and Virginia State University.
Issued in furtherance of Cooperative Extension work, Virginia Polytechnic Institute and State University, Virginia State University, and the U.S. Department of Agriculture cooperating. Alan L. Grant, Dean, College of Agriculture and Life Sciences; Edwin J. Jones, Director, Virginia Cooperative Extension, Virginia Tech, Blacksburg; Jewel E. Hairston, Administrator, 1890 Extension Program, Virginia State, Petersburg.
May 1, 2009