Crampbark
Viburnum opulus
Last reviewed: June 2026
Viburnum opulus (Crampbark) is a deciduous shrub native to South Dakota that blooms white flowers in May and June. This hardy plant thrives in partial shade with medium moisture and attracts bees and beetles.
The USDA PLANTS Database (opens in new tab) does not flag Crampbark as toxic to livestock.
Light
part shade
Water
medium
Size
72"–144" H × 72"–144" W
Bloom
May, Jun
Native to
SD
Pollinators
bees, beetles
Browse plants for this ecoregion
Crampbark is a large deciduous shrub that produces showy white flower clusters in late spring. This European viburnum grows into a substantial specimen that can reach 12 feet tall and wide at maturity. It offers three-season interest with spring blooms, summer foliage, and red berries that ripen to black in fall.
Growing Crampbark
Grow Crampbark in part shade and medium water. Mature plants reach 72 to 144 inches tall and spread 72 to 144 inches wide. Expect low maintenance to keep it looking intentional in a front yard.
In an HOA neighborhood
Crampbark is an HOA-friendly choice. Maintenance level: low. Tidiness: 4 out of 5.
Works well in: front yard, foundation, street edge, mid zone.
- Large mature size requires adequate space planning
Wildlife value
Host plant for spring azure butterfly.
The flat-topped flower clusters attract bees and beneficial beetles during the May to June bloom period. Birds feed on the colorful berries in late summer and fall.
Common questions
- When does Viburnum opulus bloom?
- Viburnum opulus produces white flowers during May and June, making it an excellent early summer blooming shrub for northern gardens.
- What pollinators visit Crampbark?
- Bees and beetles are the primary pollinators of Viburnum opulus, with the flat-topped flower clusters providing easy access to nectar and pollen.
- What growing conditions does Viburnum opulus prefer?
- Crampbark grows best in partial shade with medium to high moisture levels. It can tolerate some sun but performs better with afternoon shade in warmer climates.
- Is Crampbark toxic to livestock?
- The USDA PLANTS Database does not flag Crampbark as toxic to livestock.
- Is Crampbark HOA-friendly?
- Crampbark is generally an HOA-friendly choice in the right placement, with low maintenance.
Native range data from the USDA PLANTS Database and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
Ready to grow Crampbark? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
Not sure where to start? Take the 2-minute yard quiz