Snowball Viburnum
Viburnum opulus 'Roseum'
A spectacular spring showstopper that produces large, perfectly round clusters of pristine white flowers that truly resemble snowballs. This old-fashioned favorite creates dramatic focal points in the landscape and the flowers are excellent for cutting arrangements. The maple-like leaves provide attractive summer foliage and often develop good fall color in cooler climates.
Sun
Full sun to partial shade
Zones
2–8
USDA hardiness
Height
12-16 feet
Planting Timeline
Showing dates for Snowball Viburnum in USDA Zone 7
All Zone 7 shrub →Zone Map
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Snowball Viburnum · Zones 2–8
Growing Details
Zone-by-Zone Planting Calendar
Complete Growing Guide
Light: Full sun (6 or more hours of direct sunlight a day), Partial Shade (Direct sunlight only part of the day, 2-6 hours). Soil: Clay, High Organic Matter, Loam (Silt), Sand. Soil pH: Acid (<6.0), Alkaline (>8.0), Neutral (6.0-8.0). Drainage: Good Drainage, Moist, Occasionally Wet. Height: 12 ft. 0 in. - 16 ft. 0 in.. Spread: 8 ft. 0 in. - 15 ft. 0 in.. Spacing: 6-feet-12 feet. Growth rate: Medium. Maintenance: High. Propagation: Seed, Stem Cutting. Regions: Coastal, Mountains, Piedmont.
Harvesting
0.3 in. bright red bitter drupe in fall that shrivels after a frost looking like a red raison and persists into winter
Color: Red/Burgundy. Type: Drupe. Length: < 1 inch. Width: < 1 inch.
Garden value: Long-lasting, Showy
Harvest time: Fall, Winter
Edibility: Drupes can be eaten off the bush or used in jams.
Storage & Preservation
Snowball Viburnum flowers are best enjoyed fresh and can be displayed in a cool room (65-70°F) away from direct sunlight and heat sources to extend their lifespan of 7-10 days. For cut arrangements, place stems in clean water with floral preservative and change water every 2-3 days. Preservation methods include: (1) Air-drying flower clusters upside-down in a dark, well-ventilated space for 2-3 weeks to create lasting dried arrangements, (2) Pressing individual florets between parchment paper under weight for 2-4 weeks for crafts or potpourri, and (3) Freezing fresh blooms in ice cube trays with water for unique decorative elements lasting several months.
History & Origin
Origin: Europe, Asia and N. Africa.
Advantages
- +Attracts: Bees, Butterflies, Songbirds
- +Edible: Drupes can be eaten off the bush or used in jams.
Considerations
- -High maintenance
Companion Plants
Hostas, Astilbe, Coral Bells, and Bleeding Heart all pair well here because they're shade-tolerant understory plants — the viburnum's dense canopy creates exactly the dappled light they want, and their shallow, fibrous roots don't tangle with the viburnum's deeper woody root system. Japanese Painted Fern and Lungwort fill the same niche without competing for the same resources. Black Walnut is the genuine problem: it releases juglone through its roots and decomposing leaf litter, a compound that disrupts root respiration in many woody plants, and Viburnum opulus has documented sensitivity to it. Don't plant within the walnut's drip line, and be skeptical of any soil that's grown walnut in the past decade.
Plant Together
Hostas
Thrives in similar partial shade conditions and provides contrasting foliage texture
Astilbe
Shares preference for moist, well-draining soil and blooms complement viburnum flowers
Japanese Painted Fern
Enjoys same light conditions and silvery foliage creates beautiful contrast
Coral Bells
Similar soil requirements and colorful foliage adds season-long interest
Azalea
Both prefer acidic soil and partial shade, creating layered woodland garden effect
Bleeding Heart
Thrives in same moist, shaded conditions and provides spring color
Wild Ginger
Excellent groundcover companion that enjoys same shade and moisture levels
Lungwort
Tolerates same growing conditions and spotted leaves complement viburnum foliage
Keep Apart
Black Walnut
Produces juglone which is toxic to viburnum and inhibits root development
Eucalyptus
Releases allelopathic compounds that suppress growth of nearby shrubs
Butterfly Bush
Competes aggressively for water and nutrients, can overwhelm smaller viburnums
Pests & Disease Resistance
Resistance
Susceptible to aphids and viburnum leaf beetle
Common Pests
Viburnum leaf beetle, aphids, scale insects
Diseases
Bacterial leaf spot, powdery mildew, crown gall
Troubleshooting Snowball Viburnum
What you'll see, why it happens, and what to do about it.
Leaves skeletonized — only the veins left behind — starting mid-summer
Likely Causes
- Viburnum leaf beetle (Pyrrhalta viburni) larvae feeding in May–June, adults continuing damage through summer
- Heavy infestations can defoliate a 12-foot shrub in a single season
What to Do
- 1.In late winter, check stems for oval egg-case clusters and scrape them off — that's your best control point before larvae hatch
- 2.Spray larvae with insecticidal soap or spinosad as soon as you spot feeding in May; adults are harder to knock back
- 3.If the shrub is repeatedly hammered, consider that Viburnum opulus 'Roseum' is among the most susceptible viburnums — V. dentatum or V. prunifolium are more resistant alternatives
White powdery coating on leaves and new growth, usually showing up in late summer
Likely Causes
- Powdery mildew (Erysiphe viburni) — thrives when days are warm and nights cool, especially in humid conditions
- Poor air circulation from dense planting or crowding against a structure
What to Do
- 1.Space plants at least 8 feet apart and prune out crossing interior branches to open up airflow
- 2.Apply potassium bicarbonate or neem oil at first sign — once it covers more than 30% of the canopy, cosmetic damage is already done for the season
- 3.Powdery mildew on Snowball Viburnum is rarely fatal; if it's just ugly late in the year, skip spraying and cut affected stems back after the plant goes dormant
Angular water-soaked spots on leaves that turn brown or black, sometimes with a yellow halo
Likely Causes
- Bacterial leaf spot (Pseudomonas or Xanthomonas spp.) — spreads by rain splash and overhead irrigation
- Wet spring weather on plants with low airflow
What to Do
- 1.Switch to drip irrigation or water at the base; stop wetting the foliage
- 2.Rake and dispose of fallen leaves in autumn — do not compost them
- 3.A copper-based bactericide applied at bud break can reduce infection pressure in problem years
Rough, warty galls at the soil line or on lower stems; plant looks stunted or fails to establish after transplant
Likely Causes
- Crown gall (Agrobacterium tumefaciens) — a soil-borne bacterium that enters through wounds at planting or from pruning cuts
- Contaminated tools or previously infected soil
What to Do
- 1.Inspect the root flare and lower stems before planting — reject any nursery stock with visible galls
- 2.There's no cure once a plant is infected; remove and dispose of the entire shrub (do not compost it), and avoid replanting susceptible species in that spot for at least 3–4 years
- 3.Sterilize pruning tools with a 10% bleach solution between cuts, especially when working near the soil line
Frequently Asked Questions
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Growing Guides from Wind River Greens
Where to Buy Seeds
Sources & References
External authority sources used in compiling this guide.
- ExtensionNC State Extension
See the Methodology page for how this data is sourced, what's AI-assisted, and known limitations.