Buttonbush
Cephalanthus occidentalis
Family Rubiaceae
Midsummer turns buttonbush into a sphere-studded spectacle — perfectly round white pincushion blooms, each one crawling with bees and butterflies at the peak of the season. Few natives pull pollinators harder, and few look stranger or better doing it.
This is the shrub for your wettest, most hopeless ground — it shrugs off standing water, anchors a rain garden or pond edge, and follows its flowers with seed balls that ducks and shorebirds work all fall. Where everything else drowns, plant buttonbush and watch the wildlife arrive.
Full Sun to Part Shade
High water
Moderate growth
Native to North America
Attracts butterflies
Attracts bees
From the print shop
Growing buttonbush? Hang it.
Our Plant Library collection carries buttonbush — Cephalanthus occidentalis, print Nº 81, “Buttonbush.”
526 designsfrom $12.99white or black backgroundmatte poster, unframed
Will it fruit where you are?
Enter your ZIP — we look up your USDA hardiness zone (2023 map) and check it against what buttonbush actually needs.
Hardy inZones 4-9Buttonbush · Common problems
Common buttonbush problems
Pests
1 problem on file
- Almost none
Diseases
1 problem on file
- Almost none
Buttonbush · Growing & propagation
Growing buttonbush
- Light
- Full Sun to Part Shade
- Water
- High
A wetland native; loves wet feet, thrives in rain gardens and pond edges
Soil- Any, wet to average · pH 5.5 - 7.0
Fertilizer- None
Pruning- Late Winter
Cut back hard to shape — One of the best native shrubs for wet spots and pollinators — unmistakable round white 'sputnik' flowers alive with bees and butterflies in midsummer, then button seed heads for the birds. Takes standing water, perfect for rain gardens and pond margins. Cut back hard in late winter if it gets rangy.
Spacing- 5-8 ft
How to plant & propagate buttonbush
- Propagate
- Seed (stratify), cuttings, or layering
Buttonbush · Calculators & field guides
A little help in the garden.
Buttonbush · Yearly calendar
The buttonbush year, month by month
Jan
No calendar activity is listed for this month.
BloomPruneBloomJune to August
PruneFebruary to March
What each band means
- Bloom — flowers open — pollinators working, frost on blossoms is the danger.
- Prune — shape it now — cuts heal cleanly and structure is visible.
These are the species' typical months — expect them a few weeks earlier in warm zones and later in cold ones. Watch the plant, not just the calendar.
Buttonbush · Ecology & uses
Ecology & uses
Cephalanthus occidentalis
Buttonbush in the garden system
- Shrub layer shrub
- Nectary/insectary
- Attracts
- Butterflies, Bees, Birds
Habitat- Wetland
Moisture- Wetland / wet-tolerant
Deer- Browsed
Protect young plants
- Origin
- Native to North America
What buttonbush is grown for
! Some parts toxic — see notesFoliage mildly toxic to livestock; not an eating plant
Use- Rain gardens
- Use
- Pond edges
- Use
- Pollinator magnet
- Use
- Waterfowl
Harvesting & storing buttonbush
Seed balls feed ducks and shorebirds.
Edibility, identification, and traditional-use notes here are general reference — not medical or veterinary advice, and not a claim that any plant treats or prevents anything. Medicinal ratings record how strongly a plant features in herbal tradition, nothing more. Never eat or dose a plant you have not positively identified. More on how to use this library.
Buttonbush · Varieties & cultivars
Choosing a buttonbush variety
Species; 'Sugar Shack' (compact)
Sources & plant identity
Know what you’re growing.
See where the knowledge comes from.
Buttonbush
Cephalanthus occidentalis
The plant, at a glance.
- Botanical name
- Cephalanthus occidentalis
- Plant family
- Rubiaceae
- Growth habit
- Shrub · Perennial
- Origin
- Native to North America
- USDA plant symbol
- CEOC2
- Invasive risk
- Low
Hardiness, size and timing vary with your cultivar, soil and climate.
Rooted in research.
University extension research, brought together with hands-on growing experience at Story Thyme Farms.
Questions
Buttonbush questions, answered straight.
Is buttonbush safe for kids and pets?
With care. Foliage mildly toxic to livestock; not an eating plant Site it accordingly if children or pets roam the garden. This is general reference, not medical or veterinary advice — call a vet or poison control if something has actually been eaten.
When do you harvest buttonbush?
Seed balls feed ducks and shorebirds.
How do you propagate buttonbush?
Seed (stratify), cuttings, or layering.
Elsewhere
Where buttonbush sits in the library.
New Jersey Tea
Sweetshrub (Carolina Allspice)
Virginia Creeper
Black Locust