Red twig dogwood will brighten your winter landscaping with its bright red branches. But it will also provide variegated leaves and small white flowers and berries to hold an interest in spring through summer.
Taxonomy and Botany
Plant taxonomy classifies the red twig dogwood shrub as Cornus alba 'Elegantissima.' 'Elegantissima' is the cultivar name. A variant of this cultivar name is Argenteo-marginata. Botanically, red twig dogwoods are broadleaf, deciduous flowering shrubs.
Elegantissima red twig dogwoods grow to a height of 8 feet, with a similar spread (if there is no pruning). They bear variegated leaves (greenish-gray with a white edge) and small white flowers that form in flat clusters. These flowers are succeeded by berries that are a white color ( alba, the species name, means "white" in Latin) with hints of blue and green.
The fall foliage can pick up hints of rose or gold, but most gardeners find the foliage less attractive, overall, in autumn, as leaves pick up brown spots with age. You will be glad that the foliage is deciduous, as you will have a clear view of the red color of the bark in winter (the principle is the same as for the deciduous holly known as winterberry, except, in the case of that winter standout, it is the berries that you appreciate seeing).
Planting Zones, Sun, and Soil Requirements
Grow red twig dogwood shrubs in planting zones 3–8. Red twig dogwood bushes are considered good plants for wet areas (for example, wet spots where homeowners may wish to establish woodland gardens), although some report that they perform better in well-drained soils. Work humus into the soil for nutrients. A somewhat acidic soil is preferred. In terms of sunlight requirements, red twig dogwoods will tolerate partial shade, but their signature red bark will be brightest if they are planted in full sun.
Outstanding Characteristics and Uses in Landscaping
Red twig dogwood shrubs provide year-round interest. But despite bearing spring blossoms, variegated leaves in summer, and berries from summer to fall, clearly, this plant's common name explains the main reason that people grow it: namely, the bush's red twigs, which are brightest from late winter to early spring. If you are looking for one of the dogwoods known for a brilliant spring flowering display, turn to the tree-form dogwoods, instead.
Red twig dogwood shrubs should be planted somewhere in your yard where they can be easily viewed from a window, to take advantage of their status as top-notch specimen plants for winter landscapes. For optimal display, it is advisable to grow them against a wall that receives ample sunlight from the south or west in winter. Use them in combination with yellow twig dogwoods for an even more stunning winter display. With or without their yellow cousins, red twig dogwoods look best massed together. On a more practical level, their widely-spreading root systems make them effective plants for erosion control (for example, on steep bankings).
Pruning and Fertilizing
The brightness of this bush's red twigs has a tendency to fade over time from early spring to summer, and there is not much that you can do about that. But through proper care, you can do something about the fact that the older branches tend to be less colorful than the younger ones. Care for this plant amounts mainly to pruning. Prune in late winter or after it has bloomed.
For maximal color, prune out 1/3 of the older branches every three years or so (or even annually, as long as you do not mind having a plant of a smaller size). Such care will promote new growth. And since the younger branches bear the brightest color, that is precisely the growth that you want to encourage. If the bush is overgrown, you can cut it back to the ground. It will return within a year with young red stems.
Propagating Red Twig Dogwoods
If you want to propagate red twig dogwoods, take hardwood cuttings in late fall. Look for a stem that is as wide as a pencil. You should cut it into 6-inch to 9-inch sections with a bud near either end of each cutting. Take off side branches and dip it in rooting hormone. Plant the cutting in the ground or in pots. You can keep the planted cuttings in a cold frame that is closed over the winter. In spring, you can open the cold frame or move the pots.
It can take up to a full year for the cutting to root. Once they are rooted, you can use them in your landscape or nurture them further in a nursery bed.
Geographical Origin, Other Names for Red Twig Dogwood
The species plants (Cornus alba) are indigenous to eastern and central Asia, including some of the stomping grounds of the Tatars (or "Tartars"); thus "Tatarian" (or "Tartarian") dogwood is an alternate name for red twig dogwood shrubs.
When people wish to call attention to the foliage, rather than to the bark of the variegated cultivars, they may refer to them by names such as "silverleaf dogwoods," "silver-edge dogwoods" ('Argenteo-marginata,' the alternate cultivar name, means "silver-edged" in Latin), or "cream-edge Tatarian dogwoods."
Related Shrubs and Name Derivation
Different species of dogwood shrubs with red bark can be found around the globe in the Northern Hemisphere. All are classified under the genus, Cornus:
- Red twig dogwoods (Cornus alba), native to Asia
- Red osier dogwoods (Cornus sericea or Cornus stolonifera), native to North America
- Bloodtwig dogwoods (Cornus sanguinea), native to Europe
The similarities between these species—and the similarity in their common names, all of which include or signify "red"—has led to much confusion as to which is which, even in the nursery trade. If you have your heart set on a particular cultivar, be sure to make your purchase from an establishment that you trust.
If erosion control is a significant reason for your purchase of a red twig dogwood, be sure to seek out the red osier type, specifically. Red osier spreads by suckering to form a colony over time. The root system of such a colony can be very effective at holding back the soil on a hillside, for example. Cardinal is an example of a cultivar to look for.
Etymologists tell us that the word "dogwood" has nothing to do with dogs. Instead, it hearkens back to an old word, "dag" (think "dagger"), which referred to a sharp tool. Dogwood branches were useful in making such tools since the wood is so hard. Indeed, the Latin genus name for dogwood, Cornus means "horn."