PL. —Cornus amomumBotanical illustration — drop image
Cornus amomum

Silky Dogwood

SpringSummerFallWinter
5a8bHardiness zone
Peak bloom windowZone 6b · frost-offset weeks
Winter
Not in bloom
Spring
Peak bloom
Summer
Not in bloom
Fall
Not in bloom
Peak bloom
In bloom
Background

Cornus amomum is a native shrub found across eastern North America from southern Ontario to Florida, occurring naturally along stream banks, pond margins, and wet woodland edges. It offers multi-season interest: clusters of small white flowers in late spring, blue-white berries on red stems in late summer, and red-purple winter stems that stand out against snow. It is one of the most productive native shrubs for wet and periodically flooded sites where other ornamental shrubs struggle. It tolerates close to full shade, prefers organically rich soil at a slightly acidic to neutral pH, and benefits from a 2–4 inch mulch layer to keep its roots cool.

Silky dogwood spreads by root suckers, forming dense thickets that stabilize banks and reduce erosion. In smaller gardens this requires management — remove unwanted suckers at the soil line each summer before they establish. Renewal pruning in late winter, removing one-third of the oldest canes at ground level, keeps the plant vigorous and promotes the young growth that shows the strongest winter stem color. Over 40 bird species consume the berries; the dense structure also provides nesting cover for several shrub-nesting songbirds.

Several Native American tribes dried and used the inner bark as a smoking mixture called kinnikinnick, often blended with other plant material. Bark preparations were also applied externally as an astringent and used in traditional remedies for fever reduction.

Care guide
SunFull sun to part shade
WaterMoist to wet
SoilMoist to wet, rich, acidic to neutral
Spacing6–12 ft
Height6–12 ft
Zone5a – 8b
Native RegionAL, AR, CT, DC, DE, FL, GA, IL, IN, KY, LA, MA, MD, ME, MS, NC, NH, NJ, NY, OH, OK, PA, RI, SC, TN, VA, VT, WV
Seasonal tasks
winter
cutDo renewal pruning in late winter before new growth emerges: remove one-third of the oldest, thickest stems at ground level to stimulate vigorous new canes with stronger red-purple winter color.
spring
watchInspect emerging leaves in spring for dogwood anthracnose — tan leaf spots with purple margins, and dieback on young shoots in wet weather. Remove infected tissue and thin crowded stems to improve air circulation.
summer
watchCheck the root perimeter in early summer for suckers extending beyond the intended footprint. Sever them with a spade at the soil line before they establish into independent stems.
watchMonitor berry development in late summer. Blue-white fruits on red pedicels ripen August through September and are quickly taken by birds. Berries are not edible for humans.
fall
cutTake hardwood stem cuttings in fall after leaf drop. Cut 6–8 inch sections of current-season growth, bundle them, and store upright in moist sand in a cool location over winter for spring rooting.
watchAfter leaf drop, evaluate stem color across the shrub. The richest red-purple tones appear on one- and two-year-old canes. Mark the oldest gray-barked stems to target for late-winter renewal pruning.
Common problems

Dogwood Anthracnose

Symptoms

Irregular tan to brown spots on leaves with distinct purple or reddish margins, often starting at leaf tips and edges. In advanced cases: blighted shoots, stem cankers, and epicormic sprouts emerging from the lower trunk. Infected dead leaves may cling to branches through winter rather than dropping.

Treatment

Remove and destroy all infected leaves, shoots, and cankered branches. Avoid overhead irrigation. Apply a copper-based or chlorothalonil fungicide starting at bud break in spring, repeating every 10–14 days during wet weather. Maintain tree vigor with consistent moisture and mulch — stressed trees are far more vulnerable. In high-pressure sites, consider replacing with anthracnose-resistant cultivars such as 'Appalachian Spring'.

Dogwood Canker

Symptoms

Sunken, discolored, or cracked areas on stems and branches; wood beneath the canker is brown and dead; affected stems wilt and die back from the canker site toward the tip.

Treatment

Prune infected stems at least 6 inches below visible canker tissue. Sterilize cutting tools with 70% isopropyl alcohol between each cut. Dispose of removed material — do not compost. Maintain plant vigor through consistent watering and avoid wounding stems during routine maintenance. No chemical controls are reliably effective once infection is established; prevention through plant health is the primary strategy.

Powdery mildew

Symptoms

White or grey powdery coating on leaves — usually starting on older growth in humid conditions or when nights cool.

Treatment

Improve air circulation by thinning plants. Apply neem oil or potassium bicarbonate spray at first sign. Avoid overhead watering.