Winterthur Viburnum
Viburnum nudum ‘Winterthur’
Plant Details
USDA Plant Hardiness Zones: 5a-9b Find Your Zone
Plant Type: Deciduous Flowering Shrub or Small Tree
Height at Maturity: 6-10′
Width at Maturity: 6-8′
Spacing: 5-6′ apart for solid hedge; 10’+ apart for space between plants.
Growth Habit / Form: Upright, Rounded
Growth Rate: Moderate
Flower Color: White
Flower Size: 3-5″ wide clusters
Flowering Period: Spring
Flower Type: Flat-top Clusters
Fragrant Flowers: Yes
Foliage Color: Dark Green
Fragrant Foliage: No
Berries: Yes
Berry Color: White to Pink to Blue and then Black during winter
Sun Needs: Full to Mostly Sun, Morning Sun With Afternoon Shade, Morning Shade with Afternoon Sun
Water Needs: Average to Wet
Soil Type: Clay, Loam, Sandy, Silty
Soil Moisture / Drainage: Wet to Moist Well Drained
Soil pH: 5.0 – 6.5 (Acid)
Maintenance / Care: Low
Attracts: Butterflies, Visual Attention
Resistances: Deer, Disease, Heat, Insect, Wet Soil
Description
If you have a sunny to partially shaded area in the landscape where the soil stays consistently moist to wet ‘Winterthur’ Viburnum is a spectacular North American Native selection that will thrive in these conditions. It will also grow in average, moist but well-drained sites. One of the later blooming Viburnums, Winterthur, also called Possumhaw Viburnum or smooth witherod, produces abundant flat-top clusters of pretty aromatic white flowers beginning sometime in May to July depending on your location. The flowers are followed by large clusters of white or light to hot pink berries that change to blue in fall and then purplish-black through the winter. Oblong glossy dark green leaves during the warm season turns to an attractive wine-red to dark purple in fall. After the leaves fall the black bark provides winter interest.
With no insect or disease problems, Winterthur Viburnum is one easy to grow and low maintenance flowering shrub that is sure to provide lots of exciting color in the landscape when we need in most!
Landscape & Garden Uses
Growing 6 to 10 feet tall and 6 to 8 feet wide at maturity, Winterthur Viburnum is ideal for use as an eye-catching specimen shrub or in groupings in landscape and flowering shrub borders. Perfect in sunny to partially shaded woodland borders. Also useful to frame corners in home foundation plantings or between windows. A fine addition to bog and native plant gardens.
Suggested Spacing: 5 feet apart for solid hedge; 10 feet or more apart for space between plants.
Note: For our customers who live and garden north of USDA Plant Hardiness Zone 5a, where this Viburnum variety is not reliably winter hardy, you’ll be happy to know it can be grown in containers that can be brought indoors during winter and placed back outside when temperatures warm up in spring.
Growing Preferences
Winterthur Viburnum is very easy to grow in most any wet or moist but well drained soil of average fertility and full sun to part shade. It prefers a loamy soil rich in organic matter. Deer haven’t touched it in our gardens. For best flowering, at least 5 hours of direct sunlight per day is suggested. Responds well to light pruning in fall for shaping purposes though doing so might remove some of the berries.
Helpful Articles
Click on the link below to find helpful advice from our experts on how to plant, prune, fertilize and water Viburnums.
How To Plant And Care For Viburnum Plants
Plant Long & Prosper!
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