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Kousa Dogwood

Cornus kousa

An Asian beauty that outperforms native dogwoods with superior disease resistance and extended bloom time. The large, pointed white bracts appear after the leaves in early summer, followed by raspberry-like edible fruits and spectacular scarlet fall color. This elegant tree features attractive exfoliating bark that provides winter interest, making it a true four-season showstopper.

Sun

Full sun to partial shade

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Zones

5–8

USDA hardiness

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Height

20-30 feet

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Planting Timeline

Zone:

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Transplant

Showing dates for Kousa Dogwood in USDA Zone 7

All Zone 7 ornamental-tree →

Zone Map

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Kousa Dogwood · Zones 5–8

What grows well in Zone 7? →

Growing Details

Difficulty

Moderate

Spacing20-25 feet

SoilWell-drained, acidic, organic-rich soil

pH5.5-6.5

WaterMedium, prefers consistent moisture

SeasonSpring or fall planting

FlavorN/A

ColorWhite bracts, red fall foliage, pink-red edible fruits

SizeSmall to medium ornamental tree

Zone-by-Zone Planting Calendar

Zone	Indoor Start	Transplant	Direct Sow	Harvest
Zone 5	—	May – July	—	—
Zone 6	—	May – July	—	—
Zone 7	—	May – June	—	—
Zone 8	—	April – June	—	—

Complete Growing Guide

Light: Full sun (6 or more hours of direct sunlight a day), Partial Shade (Direct sunlight only part of the day, 2-6 hours). Soil pH: Acid (<6.0). Drainage: Good Drainage. Height: 20 ft. 0 in. - 30 ft. 0 in.. Spread: 15 ft. 0 in. - 30 ft. 0 in.. Spacing: 12-24 feet, 24-60 feet. Growth rate: Slow. Maintenance: Low. Propagation: Layering, Seed, Stem Cutting. Regions: Coastal, Mountains, Piedmont.

Harvesting

The fruit is an edible round drupe and measures 1 to 1.5 inches in diameter. The fruit is light red to pink in color. The inside is a fleshy yellowish-orange and contains a stone. The stalk measures 1.5 to 2 inches long. The fruits ripen in late summer to early fall.

Color: Green, Pink, Red/Burgundy. Type: Drupe. Length: < 1 inch. Width: < 1 inch.

Garden value: Edible, Showy

Harvest time: Fall, Summer

Edibility: Fruits are technically edible but are usually left for the birds.

Storage & Preservation

Kousa dogwood fruits are best stored fresh at room temperature for 2-3 days, or refrigerated in a breathable container at 35-40°F for up to one week. For longer preservation, freeze whole fruits in airtight bags for up to 3 months. Alternatively, dry fruits by spreading on racks in a warm, well-ventilated area for 1-2 weeks. Fresh fruits can also be made into preserves or jams, combining them with sugar and pectin for extended pantry storage (2-3 years sealed).

History & Origin

Origin: Sikkim, China to Temp. Eastern Asia

Advantages

+Attracts: Bees, Pollinators, Songbirds, Specialized Bees
+Edible: Fruits are technically edible but are usually left for the birds.
+Low maintenance

Companion Plants

Hostas, Astilbe, Heuchera, and Japanese Painted Fern all work well under a Kousa Dogwood for the same basic reason: they're shade-tolerant plants that fill the ground plane once the tree's canopy closes in, and their shallow, fibrous roots don't compete hard at depth. The fern and Heuchera in particular thrive in the slightly acidic soil (pH 5.5–6.5) that Kousa prefers, so you're not fighting the soil conditions to keep two different plants happy. Azalea and Oakleaf Hydrangea make good companions at the canopy edge — both share that acid-soil preference and bloom at complementary times, stretching the visual season from spring into midsummer without any extra soil amendment.

Black Walnut is the plant to exclude — it produces juglone, an allelopathic compound that persists in the soil and is toxic to a wide range of woody ornamentals, and Cornus is not immune. Silver Maple is a different problem: it's an aggressive, shallow-rooted tree that will out-muscle almost anything within 30 feet for water and nutrients. Eucalyptus releases allelopathic chemicals through its leaf litter, and since Kousa already wants consistent moisture and a narrow pH band, planting it next to anything that actively shifts soil chemistry is asking for a slow decline.

Plant Together

Hostas

Shade-tolerant groundcover that thrives under dogwood canopy, complementary growing conditions

Astilbe

Enjoys partial shade and moist soil conditions similar to dogwood, adds colorful blooms

Heuchera

Tolerates shade well, shallow roots don't compete with dogwood's root system

Japanese Painted Fern

Thrives in dappled shade provided by dogwood, adds textural contrast

Camellia

Similar acidic soil preferences and shade tolerance, complementary bloom times

Azalea

Shares preference for acidic, well-draining soil and partial shade conditions

Wild Ginger

Native groundcover that spreads well under dogwood canopy, similar moisture needs

Oakleaf Hydrangea

Compatible shade and soil requirements, provides structural layering

Keep Apart

Black Walnut

Produces juglone toxin that can cause leaf yellowing and stunted growth in dogwoods

Silver Maple

Aggressive shallow root system competes heavily for water and nutrients

Eucalyptus

Allelopathic compounds in leaves and roots can inhibit dogwood growth

Pests & Disease Resistance

Resistance

Excellent resistance to dogwood anthracnose and powdery mildew

Common Pests

Dogwood borer, scale insects, aphids

Diseases

Spot anthracnose (minor), canker diseases (rare)

Troubleshooting Kousa Dogwood

What you'll see, why it happens, and what to do about it.

Sawdust-like frass at the base of the trunk or in branch crotches, with small entry holes in the bark

Likely Causes

Dogwood borer (Synanthedon scitula) — larvae tunnel under bark and girdle the cambium layer
Previous mechanical damage (mower strikes, weed-trimmer wounds) that gave the borer an entry point

What to Do

1.Keep mowers and string trimmers at least 12 inches from the trunk — most borer infestations start at a wound
2.Apply a permethrin-based trunk spray in late April through June when adults are laying eggs; NC State Extension lists this as the primary management window
3.Remove and destroy heavily infested branches; there's no pulling the larvae out once they're deep in the wood

Small tan or brown spots with purple halos on leaves, appearing in late spring or early summer

Likely Causes

Spot anthracnose (Elsinoe corni) — a fungal disease that thrives in cool, wet spring weather
Overhead irrigation or rain that keeps foliage wet for extended periods

What to Do

1.Spot anthracnose on Kousa is mostly cosmetic — if the tree is otherwise healthy, no spray is needed
2.Switch to drip irrigation or water at the base to keep leaves dry
3.If defoliation is severe two years running, a copper-based fungicide applied at bud break can reduce infection pressure

Sticky, shiny coating on leaves (honeydew) with a sooty black film developing over several weeks

Likely Causes

Soft scale insects (Parthenolecanium sp. or similar) feeding on stems and undersides of branches
Aphid colonies — less common on Kousa than on native Cornus florida, but still possible

What to Do

1.In late winter before bud break, apply dormant horticultural oil at the label rate — this smothers overwintering scale crawlers and eggs
2.For active-season aphid outbreaks, a strong blast of water knocks populations back without any chemical input
3.Encourage natural predators: lady beetles and lacewings will move in if you're not spraying broad-spectrum insecticides nearby

Bark sunken, discolored, or oozing on the main trunk or a major limb; affected area feels soft when pressed

Likely Causes

Canker disease (Botryosphaeria or Phytophthora sp.) — usually enters through wounds or stress-weakened tissue
Poorly draining soil that keeps the root zone saturated, stressing the tree and opening the door to Phytophthora

What to Do

1.Prune out affected limbs at least 6 inches below the visible canker margin; sterilize your saw between cuts with 70% isopropyl alcohol
2.Don't plant Kousa Dogwood in low spots or clay soils that hold standing water — improve drainage before planting if you're in a wet site
3.Avoid fertilizing a stressed tree with high-nitrogen products; it pushes soft growth that's more susceptible to infection

Frequently Asked Questions

How long does it take for Kousa dogwood to produce fruit?▼

Kousa dogwoods typically begin flowering at 3-5 years old when established, producing white bracts in early summer followed by raspberry-like fruits in late summer to fall. Young trees may take longer to fruit reliably. Once mature, expect consistent fruiting annually in suitable growing conditions with proper pollination and adequate sunlight.

Is Kousa dogwood good for beginners?▼

Yes, Kousa dogwood is moderately easy to grow, making it suitable for intermediate gardeners. It's more disease-resistant than native dogwoods and adapts well to various conditions. However, it does require well-drained, acidic soil and proper establishment care during the first few years to thrive and produce abundant fruit.

Can you grow Kousa dogwood in containers?▼

While possible, Kousa dogwood is better suited to in-ground planting due to its mature size (25-30+ feet). If container growing, use a large pot (20+ gallons) with acidic, well-draining soil and provide consistent moisture and care. Container trees may not reach full size or produce as abundantly as landscape specimens.

When should I plant Kousa dogwood?▼

Plant Kousa dogwood in spring or fall when soil is cool and moist. Spring planting (after frost danger) gives the tree the growing season to establish roots. Fall planting in early autumn allows root development before winter dormancy. Avoid planting in hot summer months to minimize transplant stress.

What does Kousa dogwood fruit taste like?▼

Kousa dogwood fruits have a sweet, tropical flavor similar to a blend of mango and fig with a mild vanilla note. The creamy texture contains multiple seeds. Ripe fruits are soft and easily separated from the papery calyx. They're pleasant eaten fresh when fully ripe but somewhat bland if harvested early.

Kousa dogwood vs native dogwood: which is better?▼

Kousa dogwood generally outperforms native dogwoods with superior disease resistance, fewer pest issues, and extended bloom time. It produces edible fruits and dramatic fall color. Native dogwoods may be better for specific regional ecosystems and wildlife. Choose Kousa for ornamental value and fruit; native varieties for ecological benefits in appropriate regions.