Flowering Dogwood Tree Care in Atlanta

Georgia's Beloved State Tree

The Flowering Dogwood (Cornus florida) holds a special place in Georgia's heart as the official state tree. In Atlanta, dogwoods bloom in early to mid-April, producing their iconic white (or pink) bracts that blanket the understory of the city's forests and neighborhoods. The annual Atlanta Dogwood Festival, one of the oldest festivals in the country, celebrates this beloved tree each spring. Few trees capture the character of an Atlanta neighborhood like mature dogwoods growing beneath a canopy of oaks and pines.

Flowering dogwoods reach 15 to 30 feet tall with a graceful, layered, horizontal branching pattern. They provide four seasons of interest: spring flowers, summer foliage, red fall color, and attractive branching structure in winter. However, dogwoods have faced significant challenges from disease in recent decades, making proper care more important than ever. An ISA-certified arborist can help keep your dogwoods healthy and thriving.

Identifying a Flowering Dogwood

Dogwoods are recognized by their distinctive layered branching habit and four large, white or pink "petals" that are actually modified leaves called bracts. The true flowers are tiny, yellowish-green clusters at the center of the bracts. Leaves are opposite, simple, oval, 3 to 6 inches long, with prominent veins that curve toward the leaf tip. Fall color ranges from red to reddish-purple, often spectacular in Atlanta's climate.

The bark on mature trees is broken into small, square blocks, creating a distinctive alligator-hide pattern. Bright red berry-like fruits (drupes) appear in clusters in fall, providing food for birds and wildlife. Flower buds for the following spring are visible as flattened, onion-shaped buds at branch tips throughout winter.

Growing Conditions in Atlanta

Dogwoods are naturally understory trees in Atlanta's forests, growing in the dappled shade beneath taller canopy trees. This is their preferred condition: partial shade, protected from full afternoon sun, with moist, well-drained, acidic soil rich in organic matter. In Atlanta's landscape, plant dogwoods on the east or north side of buildings or under the canopy of larger trees.

Dogwoods are highly sensitive to drought stress, which is a significant concern during Atlanta's hot, dry summers. Maintain consistent moisture through regular watering and a 3 to 4 inch layer of organic mulch over the root zone. Avoid planting in full sun or in hot, exposed locations, which increases stress and disease susceptibility.

Common Problems and Diseases

Dogwood Anthracnose, caused by the fungus Discula destructiva, has been the most devastating disease of flowering dogwoods since its discovery in the 1970s. Symptoms include tan spots with purple borders on leaves, progressive twig and branch dieback, and cankers on the trunk. The disease is worst in cool, wet, shaded conditions. Maintaining tree vigor, providing good air circulation, and avoiding overhead irrigation are key prevention strategies. Plant health care treatments including fungicide applications can help protect valuable dogwoods.

Powdery Mildew has become increasingly common on dogwoods throughout the Atlanta area. The white, powdery fungal growth on leaves is unsightly and can cause early leaf drop. Resistant varieties and improved air circulation reduce mildew problems.

Borers, particularly the dogwood borer, attack stressed trees. These insects tunnel under the bark, often entering through wounds or damaged bark areas. Maintaining tree health through proper watering, mulching, and avoiding mechanical damage is the best defense.

Care and Maintenance

Dogwoods benefit from minimal but thoughtful care. Maintain a wide mulch ring with organic mulch to keep roots cool and moist. Water deeply during dry periods, especially from June through September. Fertilize lightly in spring with an acidic, slow-release fertilizer. Avoid excessive nitrogen, which promotes succulent growth susceptible to disease.

Prune minimally and only as needed to remove dead or diseased wood. The best time to prune is in late winter before flower buds open. Avoid trunk wounds from mowers and string trimmers by maintaining a grass-free mulched zone around the base.

When to Call an Arborist

Contact an ISA-certified arborist if you notice significant leaf spotting, progressive branch dieback, cankers on the trunk, or boring damage. Early treatment of anthracnose and other diseases can save a valuable dogwood. EastLake Tree Services offers diagnostic and treatment programs specifically for Atlanta's dogwood population.

Atlanta-Specific Tips

When planting new dogwoods in Atlanta, consider disease-resistant cultivars like 'Appalachian Spring' (resistant to anthracnose) or Kousa dogwood hybrids like the Stellar Series that combine disease resistance with beautiful flowers. Avoid planting near existing diseased dogwoods. Atlanta's urban heat island effect can increase stress on dogwoods, so choose shaded, cooler microclimate locations within your landscape. Protect trunk bark from lawn equipment damage, as wounds are primary entry points for borers and disease.