Cornus kousa

Flower Description

• The showy "flowers" of Cornus kousa are actually large, star-shaped white to pale pink bracts surrounding small, yellowish-green true flowers in the center.
• The bracts measure about 3-4 inches across, giving the tree a stunning, floral display in late spring to early summer (typically May to June).
• Unlike the native Cornus florida, Kousa dogwoods bloom after the tree has fully leafed out, creating a striking contrast between the blossoms and lush green foliage.

Foliage Description

• The leaves are ovate and pointed, 2-4 inches long, with a smooth, wavy margin.
• In spring and summer, they are a deep, glossy green, providing a lush canopy.
• As autumn approaches, the foliage transforms into a brilliant display of colors, ranging from deep red to purplish-pink, making Cornus kousa a highlight in the fall landscape.

Fruit Description

• In late summer to early fall, the tree produces round, raspberry-like fruits, about 1-2 inches in diameter.
• These fruits are a vibrant pinkish-red, adding visual interest and color well into autumn.
• The fruits are edible, with a soft, sweet pulp that can be enjoyed fresh or used in jams, though the texture may not appeal to everyone.
• Birds and wildlife are particularly attracted to the fruits, making Cornus kousa an excellent choice for supporting local ecosystems.

Sun Requirements

• Prefers full sun to partial shade.
• In hotter climates, some afternoon shade can help prevent leaf scorch.

Soil Requirements

• Thrives in well-drained, organically rich soil with a slightly acidic to neutral pH (5.5 to 6.8).
• Avoid heavy, poorly drained soils, which can lead to root rot. Adding compost or organic matter improves soil structure and fertility.

Watering

• Water regularly, especially during the first few years after planting to help establish a deep, healthy root system.
• Keep the soil consistently moist but not waterlogged. Allow the top inch of soil to dry out between waterings.
• Once established, Cornus kousa is moderately drought-tolerant but benefits from occasional deep watering during prolonged dry periods.

Fertilization

• Apply a balanced, slow-release fertilizer in early spring as new growth begins.
• Avoid over-fertilizing, which can lead to weak growth and reduced flowering. Organic compost or well-rotted manure can be used to enrich the soil.

Pruning

• Minimal pruning is required. Prune dead or damaged branches in late winter or early spring.
• Light shaping can be done to maintain an attractive structure, but avoid heavy pruning as it may reduce blooms.

Mulching

• Apply a 2-3 inch layer of mulch around the base of the tree to conserve moisture, moderate soil temperature, and reduce weeds.
• Keep mulch a few inches away from the trunk to prevent rot.

Pests and Diseases

• Generally pest-resistant, but occasionally can be affected by borers, scale, or dogwood anthracnose.
• Ensuring good air circulation and avoiding overhead watering can help reduce fungal issues.
• If necessary, treat with an appropriate organic insecticide or fungicide.

Winter Protection

• Young trees may benefit from burlap wrapping in their first winter in colder climates to protect against harsh winds and frost.
• A thick layer of mulch around the base helps insulate the roots.

Blooming

• Cornus kousa typically blooms in late spring to early summer with striking, star-shaped white or pink bracts surrounding small yellowish-green flowers.
• Flowers are followed by attractive red, raspberry-like fruit in late summer to early fall, which attracts birds.

General Tips

• Cornus kousa is a slow-growing, low-maintenance tree that provides multi-season interest with beautiful blooms, striking fall foliage, and unique fruit.
• Ideal for use as a specimen tree or in borders, woodland gardens, or as part of a naturalized landscape.