Buttonbush (Cephalanthus occidentalis)

Buttonbush is a deciduous, multi-stemmed shrub native to North America, especially common in wetlands, swamps, and along streambanks. It is known for its unique, spherical white flower clusters that resemble pincushions or buttons, which bloom in mid to late summer. These fragrant flowers are highly attractive to bees, butterflies, and hummingbirds. Buttonbush is ideal for rain gardens, pond edges, and wildlife-friendly landscapes.

Category

Sun Needs:

  • Full sun to partial shade
  • Best flowering in full sun
  • Tolerates light shade, especially in moist environments

Bloom Time:

  • Mid to late summer
  • White, globe-shaped flower clusters with a sweet fragrance
Size:

Height: 6 to 12 feet (can reach up to 15 feet in ideal conditions)
Width: 4 to 8 feet

Attributes:
  • Distinctive, spherical white flower heads
  • Glossy green leaves with a rounded, open form
  • Attracts pollinators and supports native wildlife
  • Tolerant of wet soils and periodic flooding
  • Native to much of the U.S. and parts of Canada
Care Tips:
  • Prefers moist to wet, acidic soils
  • Ideal for rain gardens, pond edges, and wetland restoration
  • Water regularly during establishment; tolerates standing water
  • Prune in late winter or early spring to shape or rejuvenate
  • Can be cut back hard to encourage dense growth
Pest Watch:
  • Generally pest- and disease-resistant
  • Monitor for leaf spot or mildew in humid conditions

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