Rusty Blackhaw Viburnum (Viburnum rufidulum)

Rusty Blackhaw Viburnum

Viburnum rufidulum

Its rusty buds unfurl into glossy leaves, a quiet staple of eastern woodlands. Deciduous flowering shrub; common name: Rusty Blackhaw.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; produces the most flowers in full sun, but tolerates dappled woodland shade
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Watering Water deeply when the top 5–7 cm of soil is dry; drought-tolerant once established
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Temperature Hardy to USDA zones 5–9; withstands cold winters and hot, humid summers
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Characteristics

  • Leaf: Oval to elliptical leaves with serrated margins; rusty pubescence on undersides when young, turning glossy dark green in maturity, red-purple in fall.
  • Flower: Flat-topped cymes of small, creamy white, fragrant blooms.
  • Fruit: Oval blue-black drupes ripening in fall, attractive to birds.
  • Stem: Gray-brown bark with shallow furrows on mature plants.
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Care Guide

Watering

Water regularly during the first 2–3 years of establishment; reduce watering once mature

Fertilization

Apply a balanced slow-release fertilizer once in early spring. Avoid high-nitrogen fertilizers to prevent excessive foliage growth at the expense of flowers

Composted banana peel tea:Steep fully composted banana peels in water for 24 hours; dilute 1:20 with water for root drench to avoid nutrient burn
Pruning
  • Remove dead or damaged branches in late winter before new growth emerges.
  • Thin crowded stems to improve airflow and light penetration throughout the shrub.
  • Shape lightly immediately after flowering to maintain desired form; avoid heavy pruning that reduces next year's blooms.
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic to cats; no reported toxicity

Humans: Non-toxic to humans; no known adverse health effects from ingestion or contact

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Garden Uses & Culture

Culture: N/A

Usage: Native wildlife garden plant; provides nectar for pollinators and fruit for birds; used as a hedgerow or specimen shrub