Culture
Best grown in organically rich, consistently moist, fertile, well-drained soils in full sun to part shade. Tolerant of a wide range of soils. Established shrubs tolerate some dry soils as well as occasional standing water. Trim roots with a spade and promptly remove root suckers if colonial spread is undesired. Best stem color occurs on young stems. Although pruning is not required, many gardeners choose to remove 20-25% of the oldest stems in early spring of each year to stimulate growth of new stems which will display the best color. As an alternative to annual pruning, some gardeners prune all stems close to the ground (coppice to 8") in early spring every 2-3 years to renew. Any loss of flowers through spring pruning is not terribly significant since the small flowers of this dogwood are small and rather ordinary. Plants become stressed and more vulnerable to diseases such as canker in hot summer climates south of USDA Zone 7.
Noteworthy Characteristics
Cornus alba, commonly called tatarian dogwood, is a rapid-growing, multi-stemmed, suckering, deciduous shrub that is native to eastern and central Asia in areas in part inhabited by Tatars or Tartars. It typically matures to 8-10' tall. Creamy white flowers in flat-topped clusters (cymes to 2 1/2" across) bloom in late spring, sometimes with sparse, intermittent, additional flowering continuing into early summer. Flowers give way to white berries (drupes tinged with blue-green) which ripen in mid-summer. Fruits are attractive to birds. Ovate to elliptic leaves (to 4 1/2" long) are bright yellow in full sun but greenish yellow in part shade.
Tatarian dogwood is similar in appearance to redtwig dogwood (C. sericea/stolonifera), but generally does not spread as aggressively.
Genus name comes from the Latin word cornus meaning "horn", possibly in reference to the strength and density of the wood. Cornus is also the Latin name for cornelian cherry (Cornus mas). May also be related to the Greek kerasos meaning "cherry".
Specific epithet means white.
'Byboughen' NEON BURST is a compact selection of tatarian dogwood that features bright yellow to chartreuse foliage in the spring and summer, a showy display of fall color, and vibrant red stems in winter. Small white flowers are borne in terminal clusters in mid-spring. Resists scorching in full sun. Plants have an upright to rounded growth habit and will reach up to 5' tall with a similar spread. 'Byboughen' NEON BURST was discovered as a branch mutation on a Cornus alba 'Morden Amber' plant. Plant patent number PP27956 applies to this cultivar.
Problems
Susceptible to leaf spot, twig and leaf blights and canker. Scale, leaf miner and borers are occasional insect pests.
Uses
Best in groups or massed. Naturalistic plantings in moist soils where plants are allowed to spread and form thickets. Property line screens. Hedges. Shrub borders. Site shrubs as accents in areas where key ornamental feature, the stem color, can be appreciated. For an interesting bicolor winter stem display, combine with a contrasting stem color.