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Nannyberry

Matt Lavin / Wikimedia Commons - CC BY-SA 2.0

Nannyberry

Viburnum lentago

Nannyberry is the viburnum you can walk under. Missouri Botanical Garden describes a large, upright, multi-stemmed, suckering shrub of 10 to 18 feet that may also be grown as a single-trunk tree reaching 30 feet, and that second option is most of the reason to choose it: in a group where almost everything tops out as a rounded 6-to-10-foot mass, this is the one that can be limbed up into a small tree with a canopy, a trunk and usable space beneath. It is also the northernmost of them. MBG rates it Zone 2 to 8, the native range runs from New Brunswick west to southeastern Saskatchewan, and Wikipedia calls it one of the best small trees of eastern America for parks and gardens in regions of extreme winter cold. The fruit is the second argument. Flat-topped white cymes up to 5 inches across open in May and give way to blue-black drupes on reddish stalks that hang into winter, and unlike most of the genus they are genuinely good to eat - thick-skinned, sweet and juicy in Wikipedia's description, eaten off the bush or made into jam per MBG. Two caveats belong up front. The first is mildew: MBG lists mildew and leaf spot as occasional problems and the Lady Bird Johnson Wildflower Center says outright that it sometimes develops mildew in shady areas, so this is a plant to give sun and moving air rather than a stuffy corner. The second is that it colonises by two routes at once. It sends up root suckers, which MBG says to remove unless naturalisation is what you want, and the Wildflower Center adds that old branches arch down and take root where they touch. Left alone at the back of a property that behaviour builds a thicket for free; in a tended border it is a job that returns every year.

Native: 28 US states + 5 CA provinces

Climate fit: broad (96/100)

Structure

Border

Pollinator

Light

Full sun / Part sun / Part shade

Water

Moderate water

Mature size

10-30 ft tall · 8 ft apart

Hardy in zones

2a-8b

brutally 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 42 ecoregions - 37 climate-resilient through 2070 · 5 suited today. 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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Canadian Aspen forests and parklands

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Central Pacific Northwest coastal forests

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Central Tallgrass prairie

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Central-Southern Cascades Forests

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Chihuahuan desert

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What it needs

Conditions

Light

Full sun / Part sun / Part shade

Water

Moderate water

Spacing

8 ft

Habit

Large upright multi-stemmed deciduous shrub, or a single-trunk small tree if trained, with pendulous flexible branches and a round-topped crown. The size figures across the sources are a spread rather than a contradiction, and the spread is the useful part: Missouri Botanical Garden gives 14 to 16 feet in its data table and 10 to 18 feet in its description, with a 6-to-12-foot spread; the Wildflower Center leads with 20 to 30 feet; Wikipedia gives up to 30 feet, about 30 feet, on a trunk to 10 inches thick. Read the low figures as an unpruned multi-stemmed shrub and the high ones as a plant grown up to a leader. Leaves are opposite, oval, 2 to 4 inches long, glossy dark green, finely toothed, and abruptly long-pointed at the tip, on a WINGED petiole - the winged leaf stalk plus the drawn-out tip is the field mark that separates nannyberry from blackhaw viburnum, its closest lookalike and hybrid partner. Twigs are pale green with rusty down at first, ageing dark reddish brown, and smell unpleasant when crushed. It suckers from the roots and it also layers: old branches bend to the ground and root where they touch, so an unmanaged plant becomes a colony from both ends.

Care tips

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Decide in the first few years whether you want a shrub or a tree, because the difference is made by removing stems while they are still small. Left alone it is a 10-to-18-ft multi-stemmed thicket; selected down to one to three leaders and limbed up, it becomes a round-topped small tree to 30 feet with usable space beneath. Both are legitimate; drifting between them is not.

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Prune straight after flowering and never in winter. Missouri Botanical Garden notes that the flower buds for next year form in summer, so a dormant-season tidy removes the bloom and the fruit with it.

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Give it sun and moving air. The Wildflower Center accepts shade in its light range and then says the plant sometimes develops mildew in shady areas, and MBG lists mildew and leaf spot among occasional problems. Shade is where this plant looks bad, and no amount of watering fixes it.

Lifecycle

Planting

Missouri Botanical Garden calls it easily grown in average, medium, well-drained soil in full sun to part shade. The Wildflower Center widens the light range to include shade and describes the soil as moist to dry with a circumneutral pH of about 6.8 to 7.2, so this is a viburnum for neutral and limey ground rather than one that needs acid soil. Sun matters more than the tolerance list suggests, because the shade end is where mildew appears. Plant in spring or autumn, give it 8 feet of room, and site it where air moves. MBG lists urban conditions among its tolerances, which makes it a credible street-side or parking-edge plant in the north.

Transplanting

Container stock moves easily at nursery sizes. An established plant is harder, because the root system is fibrous and wide and the plant is usually larger than it looks. The cheap way to propagate a hedge is not to move the parent but to lift the layers: branches that have rooted where they touched the ground can be severed and dug in early spring as ready-made plants.

Early growth

Water through the first two or three seasons, then largely leave it. MBG rates maintenance LOW, and the rating is honest for a naturalised planting; in a tended bed the recurring job is sucker removal, which MBG advises unless naturalisation is desired. The pruning rule is the one most people get wrong: cut immediately after flowering, because flower buds for the following year are formed in summer. Formative pruning for a tree shape belongs in these years, while the stems are small enough to remove cleanly.

Maturity

Missouri Botanical Garden records no serious insect or disease problems and names mildew and leaf spot as occasional ones, and the Wildflower Center pins down where mildew happens: in shade. Treat that as a siting instruction rather than a spray schedule. Once established the plant is durable, urban-tolerant and cold-hardy to Zone 2, and Wikipedia observes that insects rarely disfigure the foliage. Note that none of the sources cited here makes a statement about viburnum leaf beetle on this species, so this record does not make one either; if the beetle is present in your area, ask a local authority rather than reading silence as safety.

Propagation

Three routes with very different speeds. Layers are the fastest: the plant does the work itself when a branch touches soil, and the rooted section can be cut free and lifted. Root suckers can be dug from the edge of the clump in early spring in the same way. Seed is the slow route and the double dormancy is the reason - the Wildflower Center says stored seed needs a period of stratification, harvested when the fruit has gone dark blue-black, and Wikipedia states plainly that seeds do not germinate until the second year after sowing. Sow, label, and be patient for two winters. One caution on garden-collected seed: nannyberry crosses with blackhaw viburnum to give Viburnum x jackii, so seed from a garden holding both species may not come true.

Pollination

Needs cross-pollination

The flowers are perfect - each small five-petalled white flower carries both stamens with bright yellow anthers and a pistil - and they are insect-pollinated at a broad flat cyme that asks nothing of a visitor beyond landing on it. What none of the sources cited on this record settles is the compatibility mechanism, and that gap is stated rather than papered over: viburnums are widely reported to fruit far better with a genetically different partner nearby, but no source consulted here makes a breeding-system claim for Viburnum lentago specifically. The practical rule holds either way, and it comes from the clonality rather than from the genetics. A stand raised from suckers or from layers off one parent is ONE genetic individual however many stems it has, so a hedge propagated the cheap way can flower heavily and set little fruit. If the fruit is the point, and for a bird planting or a jam-making one it is, establish two or more unrelated plants within sight of each other.

Plants don't grow alone

Larval host

Butterfly

Spring azure (Celastrina ladon)

The Lady Bird Johnson Wildflower Center names nannyberry as a larval host for the spring azure (Celastrina ladon), and this is what lifts 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 reads as a list of late-spring-flowering shrubs. A May-blooming viburnum is on that list by construction.

Larval host

Moth

Hummingbird clearwing moth (Hemaris thysbe)

Viburnum is a documented larval host genus for Hemaris thysbe, but the species usually named in the host records is Viburnum opulus rather than this one. Recorded as plausible on congener grounds: the association is with the genus, and no source consulted for this record names Viburnum lentago specifically.

Pollinates

Bee

Common eastern bumblebee (Bombus impatiens)

The flat-topped cyme is a landing platform of many small open flowers with nectar and pollen freely accessible, and bumblebees work that architecture heavily in May. Missouri Botanical Garden records butterflies alongside birds under what the plant attracts and does not name bees, so this is listed as plausible from floral form and season rather than from a visitation record.

Nectar forage

Bee

Sweat bees (Lasioglossum spp.)

A shallow, open, radially symmetrical flower massed into a dense platform is the classic short-tongued bee resource, and small sweat bees are among the commonest visitors to that shape across eastern North America. Plausible on flower architecture, not on a cited species record.

Pollen forage

Fly

Hover flies (flower flies) (Syrphidae)

Hoverflies feed at exactly this kind of flat exposed cyme and are abundant in May, which puts them among the likely visitors. The entry earns its place for a second reason: syrphid larvae are aphid predators, so the same flowers that feed the adults help keep the shrub layer around them clean.

Fruit forage

Bird

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

The Wildflower Center states that songbirds, gamebirds and mammals eat the fruit in winter, and the timing is the whole value. Blue-black drupes that hang on bare branches past leaf fall are a food source at the point in the year when the soft-fruit crops are long gone, which is a different job from the August-and-September fruit of most native shrubs.

Fruit forage

Bird

Cedar waxwing (Bombycilla cedrorum)

Waxwings move in flocks and strip a fruiting shrub in one visit, and a persistent winter drupe of this size is exactly the crop they roam for. Marked plausible rather than documented because the Wildflower Center records the fruit use at the level of songbirds and gamebirds and does not name species.

Fruit forage

Bird

American robin (Turdus migratorius)

Robins are among the heaviest consumers of small drupes in eastern North America and take persistent winter fruit readily. Listed on the same footing as the waxwing: the general fruit-eating record for the species is strong, but the cited source stops at a category rather than a species list.

Fruit forage

Mammal

Eastern gray squirrel (Sciurus carolinensis)

The Wildflower Center explicitly includes mammals among the winter fruit eaters without naming them. Grey squirrels are the most likely mammal to work a fruiting shrub of this height across the eastern part of the range, so the entry sits at plausible pending a species-level source.

Foliage forage

Mammal

White-tailed deer (Odocoileus virginianus)

Worth knowing rather than assuming. Missouri Botanical Garden lists only urban conditions under Tolerate for this species and does not list deer, which is a meaningful contrast with the native shrubs whose records do, and no source consulted here rates its palatability either way. Absence from a tolerance list is not proof of browsing, but on unfenced ground it is a reason to protect a young plant rather than to gamble on it.

For people

Edible

This is the genus exception and it is worth being precise about. Missouri Botanical Garden lists the fruit as edible and says it may be eaten off the bush when ripe or used in jams and jellies; Wikipedia describes the drupe as thick-skinned, sweet and rather juicy, and notes that under the name sweet viburnum the fruit is widely palatable, unlike many species in the genus. Ripe means fully blue-black, and the flavour improves as the fruit softens. Expect a large flat stone in a fairly small fruit, which is why preserves are the usual route rather than fresh eating in quantity. Two things are NOT edible and should not be inferred from the fruit: the twigs and wood are described as ill-smelling, and Wikipedia records historical use of bark and leaves in Native American herbal medicine, which is a medicinal history and not a food one.

Edible parts

fruits

Culinary use

Eaten fresh off the bush when fully blue-black and soft, or cooked into jams and jellies. Large flat stone; birds usually take the crop first.

Native range

Native

Naturalized

Native across 26 US states + 5 CA provinces; naturalized in 2 US states.

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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Colorado Rockies forests

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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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Climate notes

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Native across the northeastern and midwestern United States and southern Canada. The Wildflower Center summarises the range as Quebec to Manitoba and Montana, south to Virginia and northeastern Missouri; Wikipedia extends it from New Brunswick west to southeastern Saskatchewan and adds disjunct populations in the Dakotas, Wyoming, Colorado and down the Appalachians through Kentucky and Virginia. Habitat is moist soil at woodland borders, and Wikipedia notes it turns up in fence corners and along roadsides, which is a fair description of a bird-sown plant. Missouri Botanical Garden adds a striking local footnote: widespread as the species is, in Missouri it is known only from low woods and wooded slopes in Schuyler County.

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Range provenance, stated plainly. The POWO taxon page returned HTTP 403 to automated retrieval, so the WGSRPD rows mapped here came from World Checklist of Vascular Plants data served through GBIF - the same Kew dataset reached by a different route. Only native rows were kept.

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The two range layers on this record disagree slightly, and the disagreement is small enough to state exactly. The Kew rows carry 31 botanical countries; the Wildflower Center and USDA per-state list carries 33 states and provinces. Colorado and Delaware appear in the state list and not in the Kew rows, so the map renders those two as established rather than native, even though Wikipedia names Colorado among the disjunct western populations. Neither structured layer carries Kentucky, although Wikipedia mentions Appalachian outliers reaching it. Georgia appears in both, and it is the far southern end of that Appalachian tail rather than anything to do with the coastal plain.

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Zone 2 to 8 by Missouri Botanical Garden, and the cold end is the headline. Very few viburnums are usable at Zone 2, and this is the one that makes a screen or a small tree on the northern plains and in the upper Midwest. Wikipedia puts it directly: among the best small trees of eastern America for parks and gardens in regions of extreme winter cold.

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Soil is undemanding within one boundary. MBG calls it easily grown in average, medium, well-drained soil, and the Wildflower Center records moist to dry soils with a circumneutral pH of roughly 6.8 to 7.2 and medium water use. That neutral-to-limey preference matters when choosing between natives on the same site: this is a plant for ordinary or slightly alkaline ground rather than for the acid, peaty conditions that suit blueberries and some other viburnums.

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Shade is the one condition that reliably causes trouble, and it is worth reading as a design constraint rather than a tolerance. The Wildflower Center accepts full shade in its light range and then notes that the plant sometimes develops mildew in shady areas; MBG lists mildew and leaf spot among occasional problems. A nannyberry in an open sunny hedgerow with air moving through it is close to trouble-free, and the same plant crammed against a north wall is the one that looks grey by August.

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MBG lists urban conditions among its tolerances, which is unusual company for a northern woodland-edge native and makes it a genuine candidate for street plantings, car-park edges and other compacted, hard-surfaced sites in the north. Deer are NOT listed among its tolerances, which is a difference worth noticing next to the tolerance lists of some other native shrubs; absence from a list is not evidence of palatability, but it is a reason not to assume protection.