Buddleja davidii

Buddleja davidii_Louis-M. Landry
Photo: Louis M. Landry

Common names: butterfly bush

Buddleja davidii (butterfly bush) is a shrub (family Buddlejaceae) with a cluster of pink to purple flowers and narrow leaves found in the San Francisco Bay area and coastal ranges of California, and is invasive in the Pacific Northwest. It is native to China. It favors riparian and bottomland habitat. It is highly regenerative and can spread via dumped garden waste. Seeds are retained on the plant over the winter and they are released in early spring or summer. Seed dispersal can start in late autumn or early winter.

Cal-IPC Rating: Watch

CDFA Rating: None?


Plant Risk Assessment - An evaluation of the potential for a plant to be invasive in California.

Weed Management Notes

  • Management Notes - Information on management techniques and effectiveness from the University of California Cooperative Extension’s Weed Research & Information Center.

Cal-IPC Newsletter Articles

Cal-IPC Symposium Presentations

Presentations are linked where available. Where a presentation is not available, find more information by reading the abstract in the Cal-IPC Symposia Archive.

There are no Symposium presentations associated with this species yet.

Other Buddleja davidii Information

  • CalPhotos - Images of plants taken mostly in California.
  • Calflora - Distribution map and records of this species in California.
  • CalWeedMapper - Distribution map of this species in California with ability to determine regional priorities.
  • EDDMapS - Distribution of this species in North America.
  • Jepson Interchange - Information on this plant's taxonomy, biology, and distribution from UC Berkeley's Jepson Herbarium.
  • USDA PLANTS Database - Information on identification and distribution, with links to websites in individual states.
  • Additional photos

    Buddleja davidii_flowers_Ron Vanderhoff_cropped
    Buddleja davidii (butterfly bush) flowers. Photo: Ron Vanderhoff
    Buddleja davidii_growth habit_Ron Vanderhoff_cropped
    Buddleja davidii (butterfly bush) growth habit. Photo: Ron Vanderhoff
    Buddleja davidii_stems, leaves, and inflorescence_RonVanderhoff_cropped
    Buddleja davidii (butterfly bush) stems, leaves, and inflorescence. Photo: Ron Vanderhoff