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Gray dogwood

Douglas Goldman / Wikimedia Commons - CC BY-SA 4.0

Gray dogwood

Cornus racemosa

Gray dogwood (Cornus racemosa) is not the dogwood most people arrive looking for. Flowering dogwood, Cornus florida, is the small tree with four big white bracts that read as petals; gray dogwood is a shrub with no bracts at all, and its flowers are small, white, four-petalled and packed into a domed terminal cluster. It is grown for stems, fruit and birds. The ornamental peak comes after the fruit, not during it: the drupes ripen white through August into October, the birds strip them within days, and what is left standing is the flower stalk itself, which by then has coloured a hard bright red and holds that colour for weeks against the greying autumn foliage. Missouri Botanical Garden makes the same observation from the other direction, describing the red terminal stems as contrast to the white berries. That is also the field mark - white fruit on RED pedicels separates it from silky dogwood, whose fruit is blue, and from pagoda dogwood, whose blue-black fruit sits on red stalks but on alternate leaves and tiered horizontal branches. The honest caveat is the same trait that makes it valuable. Gray dogwood suckers from underground rhizomes and forms thickets, and it is the most aggressive of the three at it. In a hedgerow, on a streambank, on an eroding slope or in a bird planting that is precisely what you want and MBG says so outright - plant it in groups and leave it alone to spread. Against a mown lawn edge or a tidy border it is a permanent annual chore, because you are not managing a shrub, you are managing a clone. Decide which of those two plantings you are making before you buy it, because the decision is very hard to reverse once the rhizomes are out past the original crown.

Native: 29 US states + 4 CA provinces

Climate fit: broad (79/100)

Structure

Border

Light

Full sun / Part shade

Water

Moderate water

Mature size

10-15 ft tall · 8 ft apart

Hardy in zones

4a-8b

very cold to frosty 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 39 ecoregions - 31 climate-resilient through 2070 · 5 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 Pacific Northwest coastal forests

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Central Tallgrass prairie

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Central-Southern Cascades Forests

What it needs

Conditions

Light

Full sun / Part shade

Water

Moderate water

Spacing

8 ft

Habit

Multi-stemmed, thicket-forming, suckering deciduous shrub, 10 to 15 feet tall and as wide again, with grey bark and white pith in the twigs. The Lady Bird Johnson Wildflower Center records wild plants to about 16 feet; Wikipedia gives 3.9 to 9.8 feet as typical with occasional plants to 26 feet, which is the honest spread of a plant whose height depends almost entirely on how crowded the colony is. Leaves are opposite, 2 to 3 inches long, greyish-green, elliptic to lance-shaped, and carry typically only 3 or 4 pairs of lateral veins - fewer than any other dogwood in this group and the single most reliable leaf-level identification. It sends up suckers from underground rhizomes, so the plant you buy is the first stem of a colony rather than the whole of it; a fifteen-year-old planting is one genetic individual occupying several times the footprint it was given.

Care tips

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Decide before planting whether you are making a colony or a specimen, because only one of those is achievable. Gray dogwood suckers from rhizomes and will keep doing it for as long as it lives. Given a hedgerow, bank or bird planting it does the work unasked and Missouri Botanical Garden rates its maintenance low; given a border edge it becomes a job you repeat every spring forever.

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If you want fruit, plant more than one genetic individual. Suckers and cuttings are clones, so a whole hedgerow raised the cheap way from one parent is one plant. Buy seed-grown stock, or source from two unrelated colonies, and keep them within sight of each other.

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Do not expect the berries to last. They ripen white in August and September and birds often clear them within days. The display worth planning around is what remains - the bright red pedicels, which hold colour for weeks after the fruit has gone. Site the shrub where you will see that against a dark background.

Lifecycle

Planting

Missouri Botanical Garden calls it easily grown in average, medium, well-drained soil in full sun to part shade, and says outright that it tolerates a wide range of soil conditions including both moist and somewhat dry soils. The Wildflower Center adds shade to the light range and gives circumneutral soil, pH about 6.8 to 7.2, which is a real point of separation within this group - gray dogwood is the one that is comfortable on neutral to slightly alkaline ground rather than needing acid soil. MBG lists rain garden among its suggested uses and wet soil among its tolerances, so the wet end is genuine and not a stretch. Plant in spring or autumn and give it the space it is going to take rather than the space it arrives in.

Transplanting

Container stock moves easily while young. An established colony does not move as a unit - what you can move is a rooted sucker lifted from the edge with a spade in early spring, which is the cheapest way to extend a hedgerow and the reason nobody buys gray dogwood twice for the same property.

Early growth

Water through the first two seasons and then largely leave it. MBG rates maintenance LOW, and that rating is honest for the planting it assumes - a naturalised group left alone to spread. It is not the rating for a plant in a border, where the suckering turns into a recurring job that no amount of watering or feeding affects. Cut back hard in late winter if you want to rejuvenate a leggy colony; it resprouts readily from the base.

Maturity

Genuinely trouble-free by the standards of this genus, and that is the strongest practical argument for it. Missouri Botanical Garden records no serious insect or disease problems, and the Wildflower Center describes it as resistant to most diseases, insects and physiological problems. MBG names one blemish - the dogwood bud gall, a midge-induced swelling at the twig tips, which it says is usually not a significant problem. Set that against Cornus florida, whose story in eastern North America is dogwood anthracnose and powdery mildew, and the case for the shrub dogwoods in a low-input planting becomes a health argument rather than an aesthetic one.

Propagation

Three routes, and the first is the one to use. Rooted suckers lifted from the colony edge root instantly and are already the size of a nursery plant. Softwood or hardwood cuttings strike readily. Seed works but is slower: the Wildflower Center specifies 30 to 60 days of cold stratification at 41°F, and seed is commercially available. Note that the first two routes are CLONAL, which matters for fruit set - a hedgerow propagated entirely from one parent colony is a single genetic individual, and if this species is self-incompatible, as dogwoods generally are reported to be, that hedgerow will flower well and fruit poorly.

Pollination

Needs cross-pollination

The flowers are perfect - each small white four-petalled flower carries both stamens and a pistil - and they are insect-pollinated, worked by short-tongued native bees, flies and butterflies at an open shallow cyme that asks nothing of a visitor. What none of the sources cited on this record settles is the compatibility mechanism, and that gap should be stated rather than papered over: dogwoods are generally reported self-incompatible, and Cornus florida certainly is, but no source consulted here makes that claim for Cornus racemosa specifically. The practical rule holds either way, and it comes from the clonality rather than from the genetics. A thicket raised from suckers or cuttings off one parent is ONE genetic individual however many stems it has, so a hedgerow propagated the cheap way can flower heavily and set almost no fruit. If the fruit is the point - and for a bird planting it is the whole point - establish more than one unrelated plant, ideally seed-grown or from separate wild colonies.

Plants don't grow alone

Larval host

Butterfly

Spring azure (Celastrina ladon)

The Lady Bird Johnson Wildflower Center lists gray dogwood as a larval host for the spring azure (Celastrina ladon), and this is the relationship that raises the plant above ordinary bird-food status. Spring azure larvae feed on flower buds and developing flowers rather than leaves, which is why the host list for this butterfly is a list of shrubs that flower in late spring - dogwoods, viburnums, New Jersey tea, black cherry. A hedgerow that carries gray dogwood is carrying the food plant for one of the earliest butterflies on the wing in eastern North America.

Pollinates

Bee

European honeybee (Apis mellifera)

The May to June bloom is a broad flat mass of small open flowers with nectar and pollen freely accessible, and honey bees work it steadily. It is not a specialist relationship in either direction; it is a large, easy, well-timed resource at the point in the season when colonies are building. Missouri Botanical Garden lists butterflies alongside birds under what the plant attracts.

Nectar forage

Bee

Sweat bees (Lasioglossum spp.)

The floral architecture is a short-tongued bee flower - shallow, open, radially symmetrical, presented in a dense landing platform of a cyme - and small sweat bees are among the commonest visitors to that shape across eastern North America. Marked plausible rather than documented because the sources cited here record only "attracts birds and butterflies" at a category level and do not name bee genera on this species.

Pollen forage

Bee

Mining bees (Andrena spp.)

Andrena species are spring-active ground-nesting bees whose flight period coincides closely with a late-May dogwood bloom, and they are recognised visitors to shrub dogwoods generally. Recorded as plausible on the same basis as the sweat bees: the flower shape and the timing fit, but no source consulted for this record names Andrena on Cornus racemosa. Small carpenter bees (Ceratina) belong in the same sentence and have no entry in this wildlife catalog, so they are named here rather than wired as a relationship.

Fruit forage

Bird

Eastern bluebird (Sialia sialis)

The Wildflower Center names the eastern bluebird specifically among the birds that eat this fruit. Gray dogwood drupes are a high-fat late-summer and autumn crop rather than a persistent winter one, which puts them exactly where a bird preparing to migrate or to settle for the winter needs them.

Fruit forage

Bird

Downy woodpecker (Dryobates pubescens)

Also named on the Wildflower Center record, and a useful reminder that woodpeckers are not purely insectivorous - downies take a substantial amount of fruit in autumn. The northern cardinal is named alongside it on the same source and has no entry in this wildlife catalog, so it appears here in prose rather than as a wired relationship.

Fruit forage

Bird

American robin (Turdus migratorius)

Robins are among the heaviest consumers of small autumn drupes in eastern North America and gray dogwood fruit is the right size, timing and lipid content for them. Marked plausible rather than documented only because the Wildflower Center names bluebird, cardinal and downy woodpecker specifically and does not extend its list; the general fruit-eating record for the species is strong enough that this is a cautious label rather than a doubtful claim.

Fruit forage

Bird

Cedar waxwing (Bombycilla cedrorum)

Waxwings move in flocks and strip a fruiting shrub in a single visit, which matches the observed behaviour of this crop - the white drupes commonly disappear within days of ripening, leaving the red pedicels bare. That rapid clearance is why the record treats the naked red stalks, not the berries, as the reliable autumn display.

Shelter / habitat

Bird

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

The structural value is as large as the food value here and lasts all year. A dense multi-stemmed thicket with twigs at every height is nesting and escape cover that a single-stemmed shrub cannot provide, and the Wildflower Center records the species as used for wildlife habitat and erosion control. This is the payoff for tolerating the suckering: a gray dogwood colony is habitat in a way that a well-behaved specimen shrub is not.

For people

Not eaten by humans

Not a food plant, and worth saying because two other Cornus species in this catalog are. Cornelian cherry (Cornus mas) is grown across Europe and western Asia for its edible red fruit, and kousa dogwood (Cornus kousa) carries an edible pink compound fruit. The white drupes of gray dogwood are not in that category - they are small, hard-stoned, bitter and mealy, and none of the sources cited here records any human food use. They are also gone within days of ripening, taken by birds. Treat the fruit as wildlife food rather than foraging, and do not extrapolate from the genus: 'dogwood' covers edible and inedible fruit in the same catalog.

Native range

Native

Naturalized

Native across 25 US states + 3 CA provinces; naturalized in 4 US states + 1 CA province.

Worldwide native range.

Native ecoregions

Naturally belongs in 21 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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Chihuahuan desert

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Cross-Timbers savanna-woodland

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Eastern Canadian Forest-Boreal transition

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Eastern Great Lakes lowland forests

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Edwards Plateau savanna

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Climate notes

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Native to northeastern and midwestern North America - the Wildflower Center summarises the range as Maine to Ontario and Manitoba, south to South Carolina and Arkansas - in thickets, riverbank woods, wet meadows, glade and prairie margins, pond edges and rocky bluffs. Missouri Botanical Garden treats it as a Missouri native. Provenance of the mapped range needs stating plainly: POWO returned HTTP 403 for this species, as it did for most of this wave, so the WGSRPD rows here came from World Checklist of Vascular Plants data served through GBIF - the same Kew dataset, reached by a different route - and were verified against Cornus amomum, the one species in this group POWO did answer for directly. Only native rows were kept; no introduced rows were retained for gray dogwood, so nothing was dropped from what is mapped here.

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The two range layers on this record disagree at the edges, and the disagreement is worth reading rather than smoothing over. The Kew rows carry 29 botanical countries; the Wildflower Center per-state list carries 33. Arkansas, Delaware, North Dakota, South Carolina and New Brunswick appear in the Wildflower Center list and not in the Kew rows, so the map renders them as established rather than native - even though the Wildflower Center's OWN range prose, Maine to Ontario and Manitoba south to South Carolina and Arkansas, explicitly includes South Carolina and Arkansas. The District of Columbia runs the other way, present in Kew and absent from the state list. Read the two layers as two sources drawing the same southern boundary differently, not as a claim that the plant is introduced in Arkansas.

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Zone 4 to 8 by Missouri Botanical Garden, which is a wide and genuinely useful band. It reaches further north than silky dogwood is usually placed and considerably further north than flowering dogwood is comfortable, and the cold end is one of the real reasons to choose a shrub dogwood for a midwestern or Great Lakes hedgerow. Red-osier dogwood is the sibling that goes colder still, to zone 2.

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Soil tolerance is the practical headline. Missouri Botanical Garden says it accommodates a wide range of soil conditions including both moist and somewhat dry, lists wet soil among its tolerances and rain garden among its uses, while the Wildflower Center records moist soils that will adapt to drier sites. The Wildflower Center also gives a circumneutral pH preference of roughly 6.8 to 7.2, so this is a dogwood for neutral and limey ground rather than one that needs acid soil. Between wet feet and drought, on soils from clay to gravel, there are very few eastern sites where this shrub is the wrong choice on soil grounds.

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The suckering is a climate-independent constant and it deserves to be read as a design property, not a defect. Wikipedia describes suckers from underground rhizomes forming thickets, and Missouri Botanical Garden recommends planting it in groups and leaving it alone to spread in naturalised areas and native plant gardens. On a streambank, an eroding slope, a windbreak edge or a bird planting that behaviour does the work. Along a mown edge or in a mixed border it is a permanent job. It is the most aggressively clonal of the three shrub dogwoods in this group, which is exactly why it is the one restoration plantings reach for.

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It is deer-tolerant rather than deer-proof: Missouri Botanical Garden lists deer among its tolerances, which sets it apart from most of the fruiting shrubs it competes with for the same job and is a real argument for it on unfenced rural ground.