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Pagoda dogwood

Cephas / Wikimedia Commons - CC BY-SA 4.0

Pagoda dogwood

Cornus alternifolia

Pagoda dogwood (Cornus alternifolia) is the dogwood that kills itself from the top down, and the disease has a name worth learning before you plant one. Golden canker (Cryptodiaporthe corni) turns an infected branch a bright, unmistakable golden-yellow speckled with orange fruiting bodies, kills the wood beyond it, and - if it reaches the trunk - kills everything above the point it got in. No fungicide controls it. The only treatment is cutting the branch out 4 to 6 inches below the yellow tissue and disinfecting the shears between cuts, and the only prevention is siting: the fungus takes hold on plants that are drought-stressed or heat-stressed, which is why this is a part-shade, cool-rooted, evenly-moist plant rather than a lawn specimen in full afternoon sun. Missouri Botanical Garden's culture line points the same way - some afternoon shade is appreciated in hot summer climates such as the St. Louis area - and the species genuinely thins out towards the southern edge of its range. Set that against what you get. Nothing else in the genus builds a frame like this: strongly horizontal branches held in separate tiers with gaps of air between them and the tips turned up, on a flat-topped crown 15 to 25 feet tall and often WIDER than tall at 20 to 32 feet. And it is the odd one out botanically - every other dogwood you are likely to meet in a garden has opposite leaves, and this one is alternate, which is exactly what the epithet says and the fastest field call in the genus. Two expectations to reset. If you arrived here from the word dogwood you are probably picturing Cornus florida and its four big white bracts; pagoda dogwood has NO showy bracts at all, just genuinely small cream flowers in flat open cymes, and it is grown for its architecture, its fruit and its birds. And the fruit is the field separation within this shrub group: pagoda dogwood ripens blue-black drupes on coral-RED stalks, silky dogwood ripens blue, gray dogwood ripens white on red pedicels. The birds sort all three out within days of ripening.

Native: 30 US states + 7 CA provinces

Climate fit: broad (79/100)

Focal point

Structure

Light

Full sun / Part sun / Part shade

Water

Moderate water

Mature size

15-25 ft tall · 20 ft apart

Hardy in zones

3a-7b

brutally cold to cold winters

Native in Illinois

Yes

Related products

Cold hardiness

These values are location-based: this location's current hardiness is the baseline, and the 2050 value is a projected future climate for this same location.

Now

Zone 6b

Plotwright

USDA Zone 6b

-5°F to 0°F

Well-suited

2050

2100

Zone 7a

Plotwright

0°F to 5°F

Well-suited

In plain terms: This location has cold winters. Its winters are projected to keep warming through 2050.

✓

Well-suited today and still thriving in 2050.

Heat tolerance

Heat tolerance values are location-based too: heat days today are observed at this site, and the 2050 value projects this same location under a future climate.

Loading AHS heat-zone data for this location...

Where this plant fits

Suitable across 38 ecoregions - 29 climate-resilient through 2070 · 6 suited today · 3 newly possible by 2070. Best matches first.

Appalachian mixed mesophytic forests

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Appalachian-Blue Ridge forests

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Arizona Mountains forests

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Atlantic coastal pine barrens

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Blue Mountains forests

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Central Tallgrass prairie

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Central-Southern Cascades Forests

Colorado Rockies forests

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What it needs

Conditions

Light

Full sun / Part sun / Part shade

Water

Moderate water

Spacing

20 ft

Habit

Large multi-stemmed deciduous shrub or small tree with a short trunk and a flat-topped crown of long horizontal branches, held in distinct tiers separated by gaps of open air with the branch tips turned upward - the pagoda. Missouri Botanical Garden gives 15 to 25 feet tall by 20 to 32 feet wide, so a mature plant is usually WIDER than it is tall; the Lady Bird Johnson Wildflower Center records wild plants to around 35 feet. Leaves are alternate (unique in cultivated dogwoods alongside Cornus controversa), elliptic to ovate, 2 to 5 inches long, bright green above and pale, downy and almost white beneath. Bark is dark reddish-brown with shallow ridges. It throws basal shoots and can widen into a loose multi-stemmed clump, but it does NOT run into a dense thicket the way its shrub-dogwood siblings do - gray dogwood and silky dogwood both colonise from the roots and pagoda dogwood essentially builds one wide, layered crown instead. The branch architecture is also its structural weakness: thin bark on long horizontal limbs catches snow and ice, and the Wildflower Center records wind and ice damage as common.

Care tips

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Site it for shade and moisture before you site it for looks. Golden canker is a stress disease - it takes hold on plants that are drought-stressed or heat-stressed - so the north or east side of a building, high shade from taller trees, and soil that never bakes dry are the whole prevention programme. A pagoda dogwood in the middle of a sunny lawn is a golden-canker case waiting to be diagnosed, and MBG's own culture note asks for afternoon shade in hot-summer climates.

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Learn what golden canker looks like so you catch it in the first branch. Infected wood turns a bright golden-yellow, unmissable against normal bark, with scattered orange fruiting bodies over it. Cut 4 to 6 inches BELOW the yellow tissue, dip the shears in household bleach or rubbing alcohol between every cut, and get it out before it reaches the trunk - once it is in the trunk everything above the infection dies and no fungicide will change that.

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Check the soil pH and check for lime. The Wildflower Center rates its CaCO3 tolerance LOW and asks for acid, cool, moist, well-drained ground. On limestone, on chalky fill, or in a bed that has been limed for a lawn, this plant will sulk and then decline, and no amount of watering fixes it. This is one of the sharpest site constraints in the whole shrub-dogwood group.

Lifecycle

Planting

Plant in spring in acidic, organically rich, medium-moisture, well-drained soil. Missouri Botanical Garden rates it full sun to part shade and adds that some afternoon shade is appreciated in hot summer climates such as the St. Louis area; the Wildflower Center goes further and lists it as part shade to SHADE, on cool, moist, acid, well-drained soils. Take the shadier reading in any garden with hot summers - it is a woodland-edge understorey plant and full exposed sun is the reliable route into golden canker. Lime is a genuine constraint: the Wildflower Center rates its CaCO3 tolerance LOW, so a chalky or heavily limed site will not do, which is the sharpest contrast with a limestone-tolerant native shrub like yaupon. Mulch a wide ring to keep the root zone cool without piling mulch against the stems.

Transplanting

Moves reasonably as young container stock in spring. Older plants resent it, and the wide shallow root plate under a broad crown does not lift cleanly. Site it once and site it right - the tiered habit takes a decade to build and cannot be rebuilt by pruning.

Early growth

Water through dry spells for the first three seasons. Prune as little as possible: every horizontal branch removed is a tier that will not come back, and the plant has no capacity to rebuild the layered form from below. Missouri Botanical Garden rates maintenance LOW, which is fair for a well-sited plant and misleading for a badly sited one.

Maturity

Golden canker (Cryptodiaporthe corni) is the disease that defines this species, and it is not on Missouri Botanical Garden's generic problem list under that name - MBG lists leaf spot, twig and leaf blights, root rot, canker, scale, leaf miner and borers. University extension plant-disease clinics across the upper Midwest describe golden canker specifically: leaves on an infected branch wilt and die, the branch tissue turns bright golden-yellow with scattered orange fruiting bodies, and infection moving into the trunk kills everything above it. Fungicides do not work. Cut infected branches 4 to 6 inches below the yellow tissue and disinfect the shears between cuts with household bleach or rubbing alcohol. Beyond that, dogwood sawfly (Macremphytus species) larvae, coated in a white waxy bloom, can skeletonise and defoliate whole branches in late summer, and dogwood borer enters through wounds and mower damage at the base. Wind and ice breakage on the long thin-barked horizontal limbs is routine rather than exceptional.

Propagation

From seed or from softwood cuttings. The Wildflower Center notes the useful detail that cuttings must not be disturbed until they have been through a winter dormancy and have begun spring growth - lifting a rooted cutting in autumn is the standard way to lose the batch. Seed matures inside the blue-black fruit in mid-summer and can be stored or sown without extracting it from the pulp. Beat the birds to it or there will be nothing to collect.

Pollination

Self-fertile

The flowers are perfect - small, cream to yellowish-white, four petals each, packed into flat open cymes 2 to 5 inches across - and they are fragrant, which the big-bracted dogwoods are not. A flat cyme is the most generalist floral platform there is: short-tongued native bees, honey bees, hoverflies, soldier beetles and small wasps all work it, and none of them is a specialist. Neither Missouri Botanical Garden nor the Wildflower Center records any pollenizer requirement, and single specimens in botanic gardens fruit, so a lone plant is expected to set a crop - which is the practical difference between this and a dioecious shrub like yaupon, where a lone female never berries. Marked self-fertile on that basis rather than on a published self-compatibility trial; no source consulted here makes an explicit self-compatibility statement, and that gap is stated rather than papered over.

Plants don't grow alone

Larval host

Butterfly

Spring azure (Celastrina ladon)

The Lady Bird Johnson Wildflower Center names the spring azure as the larval host relationship on this species, and it is the most specific wildlife fact in the record. Spring azure larvae feed on flower buds and developing flowers rather than on leaves, which means the resource IS the bloom - a plant sheared or pruned out of flower is a plant that has stopped being a host. The azure flies early, so the May-into-June cyme lands in the right window. Note that this catalog also carries the Appalachian azure, a closely related species that hosts on black cohosh instead; the two are near-identical on the wing and it is the host plant, not the butterfly, that tells them apart.

Pollinates

Fly

Hover flies (flower flies) (Syrphidae)

Hoverflies are the visitor group most often overlooked on this kind of flower and are among the most numerous on it. A shallow open cyme with exposed nectaries suits a short mouthpart perfectly, and hoverflies are active in cool, part-shaded woodland-edge conditions where bee activity drops off - which is precisely the habitat this plant occupies. The larvae of many syrphids are aphid predators, so the same insects are working on the pest side of the garden as well.

Nectar forage

Bee

European honeybee (Apis mellifera)

Missouri Botanical Garden records the flowers as showy, fragrant, and attractive to butterflies and birds, and a flat-topped cyme of small open flowers is directly accessible to a honey bee with no floral tube to negotiate. The bloom is a genuinely useful late-spring nectar flow in woodland-edge settings, sitting after the maples and before the mid-summer meadow plants.

Fruit forage

Bird

Cedar waxwing (Bombycilla cedrorum)

Waxwings move in flocks and strip fruiting shrubs in a single visit, and dogwood drupes are among the highest-fat fruits available in late summer - the reason this genus is rated so highly for birds. Pagoda dogwood fruit does NOT persist into winter the way holly does; it ripens in late summer and is gone. Plan for it as an autumn-migration fuel stop rather than a winter larder.

Fruit forage

Bird

American robin (Turdus migratorius)

Robins are among the thrushes that take dogwood fruit heavily, and they are usually the birds that empty a garden specimen. Wikipedia records at least eleven bird species feeding on the fruit of this species; the robin is the one a gardener will actually notice, because it feeds in the open and returns repeatedly to the same plant.

Fruit forage

Bird

Eastern bluebird (Sialia sialis)

Bluebirds switch from insects to fruit as the season turns, and a late-summer high-fat drupe on an open, tiered crown with abundant perching branches is close to ideal for them. The horizontal branching matters here in a way it does not for a dense thicket shrub: bluebirds hunt and feed from exposed perches, and this plant is mostly exposed perches.

Fruit forage

Bird

Eastern songbirds (multi-species) (multiple species (Passeriformes))

The Wildflower Center records the species as attracting ground, water and songbirds and many mammals, and Wikipedia puts the count at eleven or more bird species plus black bear. Several of the birds specifically named on this plant have no entry in this catalog and so are named here rather than wired as relationships: ruffed grouse, wild turkey and pheasant all take the bitter drupes from the ground. Between this, gray dogwood and silky dogwood, the shrub dogwoods are among the highest-value native fruiting shrubs for birds anywhere in eastern North America - which is the real argument for planting all three rather than one.

Fruit forage

Mammal

Eastern gray squirrel (Sciurus carolinensis)

The Wildflower Center names squirrels among the mammals taking the fruit. Wikipedia adds black bear, which has no entry in this catalog. Squirrels are a mixed blessing on this plant - they take fruit before it is fully ripe and they strip bark on young stems, and bark wounds are an entry point for the borers and cankers that cut this plant short.

Foliage forage

Mammal

White-tailed deer (Odocoileus virginianus)

This one carries a source conflict worth surfacing rather than smoothing over. Missouri Botanical Garden lists Deer under Tolerate, meaning it rates the plant as deer-resistant. Wikipedia records the foliage as eaten by deer, beaver and rabbits. Both can be true: an established plant with its growth above browse height tolerates deer well, and a newly planted whip of 3 feet in a high-pressure area does not. Protect it for the first few seasons and then stop worrying, and do not read MBG's tolerance rating as a guarantee on a young plant.

Shelter / habitat

Bee

Stem-nesting native bees (multiple genera (Ceratina, Hylaeus, Osmia, etc.))

Dogwood stems are pithy, and pithy-stemmed shrubs are the standard nesting substrate for small carpenter bees (Ceratina) and other stem-nesting natives, which excavate the soft centre of a broken or cut stem and provision cells inside it. That relationship is well documented at the level of the plant group - Cornus, Rubus, Sambucus - rather than for Cornus alternifolia specifically, which is why this is marked plausible. The practical consequence is the same either way: leave cut stems standing at 12 to 18 inches rather than flush-cutting and clearing them, and the nesting habitat is free.

For people

Not eaten by humans

Not a fruit crop and not a foraging plant. The Wildflower Center is blunt that the drupes are bitter and not edible for humans, which is exactly why the birds get all of them - the fat-rich pulp is a bird food, not a people food, and the fruit is a single hard stone under a thin skin anyway. There is no toxicity warning attached to it in the sources consulted; it is simply unpalatable. Two genuine non-food uses are recorded. The roots, mixed with vinegar, yield a light-to-dark brown dye. And Wikipedia records the species in traditional Chinese medicine as a tonic, analgesic and diuretic, which is noted as ethnobotany rather than offered as a recommendation - no source here supports any medicinal use.

Native range

Native across 30 US states + 7 CA provinces.

Worldwide native range.

Native ecoregions

Naturally belongs in 17 ecoregions - its native range crosses a state or province each one spans (not necessarily this exact habitat).

Appalachian mixed mesophytic forests

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Appalachian-Blue Ridge forests

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Atlantic coastal pine barrens

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Canadian Aspen forests and parklands

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Central Tallgrass prairie

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Eastern Canadian Forest-Boreal transition

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Eastern Great Lakes lowland forests

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Gulf of St. Lawrence lowland forests

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Mississippi lowland forests

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Northeastern Coastal Forests

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Climate notes

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Native to eastern North America from Newfoundland west to southern Manitoba and Minnesota, south to northern Florida, Alabama, Mississippi and Arkansas, in rich deciduous and mixed woods, on rocky slopes, at forest and swamp margins and on shrub balds. Provenance is worth stating plainly rather than implying it is first-hand Kew data. POWO returned HTTP 403 for this species, as it did for most of this wave, so the worldwide native rows here come from World Checklist of Vascular Plants records served through GBIF - the same Kew dataset, reached by a different route - and were verified against the one species in the wave POWO did answer for, Cornus amomum. The names were joined to TDWG Level-3 codes through the committed gazetteer with 0 unmatched names rather than hand-transcribed.

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The Kew rows recorded for this species are native-only: there were no introduced occurrences to exclude, which is itself the contrast with two other species in this same wave. For Tatarian honeysuckle and winter honeysuckle the excluded introduced rows are the single most important fact about the plant, because those species are invasive across eastern North America; for pagoda dogwood there is nothing to exclude, because it is a well-behaved native that has not gone anywhere it does not belong. Note also that the worldwide list carries District of Columbia (WDC) where the per-state Wildflower Center list does not, so the two layers differ by that one entry.

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Hardiness is Zone 3 to 7 per Missouri Botanical Garden, and the cold end is the easy end. This is a northern and upland plant that is genuinely rare towards the southern edge of its range, and where it does grow in the south it is a mountain and cool-ravine plant rather than a lowland one. The practical southern limit is not winter cold, it is summer stress plus golden canker.

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The two heat statements available are both about siting rather than about a limit. Missouri Botanical Garden asks for some afternoon shade in hot summer climates such as the St. Louis area, and the disease literature ties golden-canker infection to drought and heat stress. Read together they say the same thing: in a hot-summer garden this belongs on the north or east side of a building, under high shade, on soil that never bakes dry.

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Soil chemistry is a hard constraint that is easy to miss. The Wildflower Center rates CaCO3 tolerance LOW and calls for cool, moist, acid, well-drained soil, so limestone ground and heavily limed suburban topsoil are both wrong sites. It is otherwise tolerant of poor soils and clay, and Missouri Botanical Garden lists black walnut among its tolerances - a genuinely useful trait, since juglone rules out a great many small trees under a walnut canopy.

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The Wildflower Center gives a national wetland indicator of FAC to FACU depending on region, which is the honest middle: it grows near water and at swamp margins but is not a wetland plant. That is the cleanest climatic separation from its siblings in this group. Silky dogwood is a genuine streambank and wet-ground shrub, gray dogwood takes dry upland thickets and old fields, and pagoda dogwood wants the moist, shaded, well-drained middle ground that neither of them insists on.