Synonyms: Sarathamnus scoparius, Spartium scoparius
Common names: Scotch broom; English broom; common broom
Cytisus scoparius (Scotch broom) is a perennial shrub (family Fabaceae), which grows in sunny sites with dry sandy soil, and spreads rapidly through pastures, borders of forests, and roadsides. Cytisus scoparius can be found from the coast to the Sierra foothills. This weed crowds out native species, has a seedbank that can remain dormant for up to 80 years, diminishes habitat for grazing animals, and increases risk for wildland fires.Cal-IPC Rating: High
CDFA Rating: C*
Plant Assessment Form - Information gathered by Cal-IPC on the impacts, rate of spread, and distribution of invasive plants in California. Does not include management information.
Species ID Card
Invasive Species ID Card - To support field identification of early detection species, Cal-IPC has designed a set of Species ID cards that can be downloaded, printed double-sided, and trimmed to size.
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
- Weeds and climate resilience in Sierra meadows. Brusati, Elizabeth; Johnson, Doug. Vol 24, Issue 1
- Scotch broom gall mite: a new partner in broom management . Oneto, Scott. Vol 23, Issue 3
- Weed biological control agents approved for California. Pitcairn, Michael J.; Smith, Lincoln; Moran, Patrick. Vol 22, Issue 1
- Wildland weed news. Cal-IPC. Vol 20, Issue 4
- Prioritizing Regional Response to Invasive Plants in the Sierra Nevada. Brusati, Elizabeth; Morawitz, Dana; Powell, Cynthia. Vol 19, Issue 2
- Interview with Cal-IPC co-founder Carla Bossard. Darin, Gina. Vol 18, Issue 4
- Nevada County Scotch Broom Challenge. Lorenson, Lynn. Vol 18, Issue 2
- Recommended action on invasive ornamentals. Cal-IPC. Vol 14, Issue 1
- Don’t sell a pest: A new partnership to prevent plant invasions through horticulture. Connick, Sarah; Gerel, Mike. Vol 13, Issue 2
- Scotch broom lopping trial. Taylor, Mike. Vol 13, Issue 1
- An army of one: One man’s fight against broom in Tilden Park. Richardson, Brianna. Vol 12, Issue 3
- Fighting weeds in the Tahoe basin. Donaldson, Sue. Vol 11, Issue 2
- International broom initiative: A comprehensive broom and gorse biological control effort. CalEPPC. Vol 09, Issue 2
- Richmond weed abatement ordinance. . Vol 07, Issue 1
- Fort Ord readies the troops for war – on weeds!. Fry, Virginia. Vol 06, Issue 1
- Highways as corridors of dispersal. Madison, John. Vol 04, Issue 1
- Marin supervisors establish policy against non-natives. Griffith, Quentin. Vol 03, Issue 2
- Exotic pest plants of greatest ecological concern in California September 1994. Cal-IPC. Vol 02, Issue 4
- California Exotic Pest Plant Council draft list exotic plants of greatest concern October 1993. CalEPPC. Vol 01, Issue 4
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.
- A test of the herbicide Weed Slayer for the control of invasive plants. Thomas, Don (2020)
- The role of public gardens as sentinels of plant invasion. Culley, Theresa; Dreisilker, Kurt; Ryan, Clair; Landel, Hans; Cavallin, Nadia; Arcate Schuler, Jessica; Shultz, Brittany; Gettig, Roger; Havens, Kayri (2020)
- Development and persistence of soil impacts following Scotch broom invasion. Grove, Sara; Parker, Ingrid; Haubensak, Karen (2018)
- Testing efficacy of control methods of the invasive shrub Cytisus scoparius in forest habitat of the Pacific Northwest. Haubensak, Karen A.; Parker, Ingrid M.; Grove, Sara; Kimitsuka, Stephanie; Foster, Jeffrey R.; Benson, Nancy F. (2010)
- Control of Scotch broom (Cytisus scoparius). Oneto, Scott; DiTomaso, Joseph M.; Kyser, Guy B. (2005)
- Partnering to prevent invasions of plants of horticultural origin. Connick, Sarah; Gerel, Mike (2004)
- A decade of dune restoration at the Lanphere Dunes. Pickart, Andrea (2003)
- Getting the job done: Working within the regulatory environment at Lake Tahoe to manage weeds. Donaldson, Susan; West, Wendy; Taylor, Kirk (2003)
Other Cytisus scoparius Information
- CalPhotos - Images of plants taken mostly in California.
- Calflora - See the distribution of this species on Calflora's map of California.
- CalWeedMapper - Distribution information with ability to determine regional priorities.
- Jepson Online Interchange for California Flora - Information on taxonomy, biology, and distribution from UC Berkeley's Jepson Herbarium.
- CDFA - California official noxious weeds.
- USDA PLANTS Database - Federal database with information on identification and distribution, and links to websites in individual states.
- Bugwood - National database from the Center for Invasive Species and Ecosystem Health at the University of Georgia.
- EDD MapS - North American distribution based on Early Detection and Distribution Mapping System.