How to Grow Blackhawk Viburnum
Blackhawk Viburnum
Viburnum prunifolium 'Blackhawk'
shrubBlackhawk Viburnum is a compact, deciduous shrub prized for its glossy dark foliage and abundant clusters of small white flowers followed by distinctive blue-black berries. This cultivar is a smaller, more refined version of the native blackhaw viburnum, making it ideal for ornamental landscapes and wildlife gardens.
When should you plant Blackhawk Viburnum in your zone?
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Example Blackhawk Viburnum timeline · Pittsburgh, PA (Zone 6b)
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Plant Blackhawk Viburnum
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Blackhawk Viburnum
Late summer into fallBefore the first fall frost (≈ Nov 8)
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Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 4-8, with best performance in zones 5-7
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Get my Blackhawk Viburnum timeline →Growth Stages
Establishment
3-6 monthsNewly planted shrub with initial leaf development and root establishment
Water deeply 2-3 times per week for first year; apply 2-3 inches of mulch around base; prune only to remove dead or crossing branches
Vegetative Growth
Year 1-2Vigorous branch development with glossy compound leaves emerging; shrub fills in and develops framework
Continue moderate watering; light pruning to shape desired form; fertilize in early spring with balanced fertilizer; thin crossing or crowded branches
Flowering
2-3 weeks in springDense clusters of small white flowers appear in spring (April-May), covering branch tips attracting pollinators
Do not prune during flowering; provide consistent moisture; deadheading not necessary; flowers are self-fertile but cross-pollination improves fruit set
Fruiting
6-8 weeks, fruits persist through winterFlowers fade and small drupes develop, turning from green to red to distinctive blue-black by late summer/fall
Maintain consistent watering as fruits develop; avoid over-fertilizing which reduces fruiting; leave fruit on plant for wildlife food and fall color interest
Dormancy
November-MarchDeciduous leaves turn burgundy to purple-red in fall before dropping; berries remain on branches through winter
Prune in late winter (January-February) before new growth; remove dead, diseased, or crossing canes; no supplemental watering needed; berries feed birds and wildlife
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Prune and destroy infested branches; apply horticultural oil in early spring before bud break; encourage natural predators
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Spray with strong water stream; use insecticidal soap; apply neem oil in early morning; encourage ladybugs and parasitic wasps
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Increase humidity with regular watering; spray with miticide if severe; prune infested branches
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Improve air circulation; apply sulfur fungicide or horticultural oil; remove affected leaves; avoid overhead watering
Uses
Wildlife Food & Habitat
WildlifeBlackhawk Viburnum berries are an excellent food source for songbirds and wildlife throughout fall and winter. The dense branching structure provides shelter and nesting habitat for birds. [source]
Traditional Food & Beverage
CulinaryHistorically, blackhaw berries were eaten fresh or dried by Native Americans and early settlers. The tart berries can be used to make jams, syrups, or medicinal teas. [source]
Herbal Remedies & Wellness
MedicinalViburnum prunifolium bark and berries have been traditionally used in herbal medicine for women's health, supporting reproductive wellness and uterine tone in folk herbalism. [source]
Ornamental Landscape Design
HouseholdBlackhawk Viburnum serves as a premium specimen shrub, accent plant, or hedge in residential and public gardens, offering year-round interest with white spring flowers, summer foliage, and persistent blue-black berries. [source]
Cut Branches & Floral Design
CraftThe glossy foliage and berry-laden branches make excellent material for fall and winter floral arrangements and dried arrangements lasting several weeks. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Berries do not require harvesting for ornamental or wildlife purposes; leave on plant through winter. If collecting for crafts or bird food, harvest in late fall (October-November) when berries are fully blue-black; clip berry clusters with pruners.
Fun Facts
- 🌱 Blackhawk Viburnum is native to the eastern United States and was historically valued by Native Americans, who used the bark, berries, and wood for various purposes including cordage and tool-making.
- 🌱 The name 'blackhaw' comes from the dark blue-black color of the mature berries, which are often called 'haws'—a traditional term for small fruits of hawthorn-like shrubs.
- 🌱 Unlike many ornamental shrubs, Blackhawk Viburnum produces better fruit set and flowering with cross-pollination from another viburnum cultivar, making multi-shrub plantings more rewarding.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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