For larger plants, cut shrubs at ground level and consider applying herbicide to the stump to prevent regrowth.Care must be taken to extract the entire root otherwise stump sprouting is likely to occur. Do not plant Spanish Broom, no matter how well-contained the area might seem.Don’t unload, park, or store equipment or vehicles in infested areas remove plant material from any equipment, vehicles, or clothing used in such areas, and wash equipment and vehicles before leaving infested areas.Ensure plants (particularly flowering heads or root fragments) are bagged or covered to prevent spread during transport to designated disposal sites (e.g.alfalfa or barley) to re-vegetate exposed soil and resist invasion. use grazing plans that prevent soil exposure from overgrazing), and use seed mixes with dense, early colonization (e.g. Remove plant material from any equipment, vehicles, or clothing used in infested areas and wash equipment and vehicles at designated cleaning sites before leaving these areas.Ensure soil and gravel are uncontaminated before transport.Regularly monitor properties for infestations.What to do if you spot it: You can report any sighting by clicking here. Learn to identify Spanish Broom: use the images presented in this profile page to learn how to identify this plant. See our Written Findings for more information about Spanish broom ( Spartium junceum).Spanish Broom is not yet found in the Sea to Sky Region, so PREVENTION is key. See our postcard for early detection information about Spanish broom. Please refer to the PNW Weed Management Handbook, or contact your county noxious weed coordinator. Herbicide application following stem-cutting can be an effective combination. Heavily mulching and then re-vegetating the infested area with native plants or non-invasive garden ornamentals can help prevent re-establishment of Spanish broom. The stems of large shrubs can be cut however, re-sprouting will occur unless the cut stump is treated with herbicide. The best time to hand-pull is between July and September, especially when the soil is dry. Otherwise, the root fragments will re-sprout new plants. Hand-pulling can be effective when shrubs are still small and the entire root structure can be removed. Small plants and seedlings can be effectively controlled through hand hoeing. Fortunately, seeds do not appear to germinate when covered with 10 cm of soil, so heavy mulching may be an effective means to prevent new infestations. How Do I Control It? General Control Strategyīecause Spanish broom produces so many seeds, it is important to watch for new seedlings, especially if the soil is disturbed. Seeds can remain dormant for at least five years, although broom seeds have been shown to survive for over 25 years. One plant can produce between 7,000 to 10,000 seeds in just one growing season. Spanish broom reproduces primarily by seed. Please click here to see a county level distribution map of Spanish broom in Washington. Like Scotch broom, it is typically found in disturbed areas including eroded slopes, vacant lots, and roadsides. Its high tolerance to drought and ability to produce nitrogen allow this shrub to grow in sunny, dry, areas with poor, often rocky soil. If you need help with identification, please contact your county noxious weed coordinator Where does it grow? From a distance, Spanish broom looks very similar to Scotch broom ( Cytisus scorparious), which is a Class B noxious weed in Washington.
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