Common Buttonbush
Cephalanthus occidentalis
Last reviewed: July 2026
Cephalanthus occidentalis (Common Buttonbush) is a native deciduous shrub found across most of the United States. It produces distinctive white spherical flower clusters from June through August and thrives in wet soils.
Common Buttonbush is listed as toxic to grazing livestock (cattle, sheep, and goats) at a moderate level by the USDA PLANTS Database (opens in new tab). This is a livestock indicator and is separate from pet toxicity.
Light
part sun
Water
high
Size
48"–120" H × 48"–120" W
Bloom
Jun, Jul, Aug
Native to
AL, AR, AZ, CA and 29 more states
Pollinators
bees, butterflies, moths
Deer
Resistant (per Prairie Moon Nursery)
Browse plants for this ecoregion
Common buttonbush is a native shrub that produces distinctive white, spherical flower clusters from June through August. It naturally grows in wetlands and requires consistently moist to wet soil conditions to thrive. This deciduous shrub can reach 4-10 feet in both height and width at maturity.
Growing Common Buttonbush
Grow Common Buttonbush in part sun and high water. Mature plants reach 48 to 120 inches tall and spread 48 to 120 inches wide. Expect moderate maintenance to keep it looking intentional in a front yard.
In an HOA neighborhood
Common Buttonbush takes more care to keep looking intentional in a front yard. Maintenance level: moderate. Consider it for backyard or mid-zone beds rather than the street edge.
Works well in: backyard only.
- Requires wet soil conditions that may create drainage issues
- Large mature size may appear uncontrolled
- Informal growth habit lacks structured appearance
Wildlife value
The unique ball-shaped flowers attract bees, butterflies, and moths throughout the summer blooming period. Birds also benefit from the seeds produced after flowering.
Common questions
- Where does Common Buttonbush grow naturally?
- Common Buttonbush is native to most of the United States, found in 37 states from coast to coast including the Southeast, Midwest, Northeast, and parts of the Southwest.
- When does Cephalanthus occidentalis bloom?
- Common Buttonbush blooms from June through August, producing distinctive white, spherical flower clusters that resemble pincushions.
- What pollinators visit Common Buttonbush?
- The fragrant flowers attract numerous pollinators including bees, butterflies, and moths. The spherical flower heads provide an excellent landing platform for visiting insects.
- What growing conditions does Common Buttonbush prefer?
- This shrub thrives in consistently moist to wet soils and can tolerate full sun to partial shade. It naturally grows along pond edges, stream banks, and in wetland areas.
- Is Common Buttonbush toxic to livestock?
- Common Buttonbush is listed as toxic to grazing livestock such as cattle, sheep, and goats (moderate severity) by the USDA PLANTS Database. This is separate from pet (dog and cat) toxicity.
- Is Common Buttonbush HOA-friendly?
- Common Buttonbush takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.
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 Common Buttonbush? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
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