The safest approach is to avoid planting any broom species. Some of the available species include sweet broom ( Cytisus x spachianus and Genista racemosa) and multiple Scotch broom hybrids including Burkwood’s broom ( Cytisus x burkwoodii), Lilac Time, Moonlight, and Lena to name a few. Residents should avoid planting them as many of these have similar invasive characteristics. The four most common broom species in California are Scotch broom ( Cytisus scoparius), French broom ( Genista monspessulana), Spanish broom ( Spartium junceum), and Portuguese broom ( Cytisus striatus).Īlthough many retailers have stopped selling the species mentioned above, some nurseries still sell these and other brooms, including many hybrids. In addition, as legumes, brooms can fix atmospheric nitrogen, increasing soil fertility and giving a competitive advantage to other non-native weeds that, unlike the local natives, thrive on high nitrogen levels. Their dense stems make regeneration of most other plant species difficult or impossible, and they create a dangerous fire hazard. These highly competitive shrubs grow rapidly and form dense stands that both people and wildlife find impenetrable. As a result, five broom species have become naturalized in California and are classified as invasive weeds by many federal, state, and local jurisdictions. Initially introduced as ornamentals, they were later promoted by federal and state agencies for erosion control along roadsides and in mined areas. Brooms can be found growing along roadsides, forestlands, coastlines, riparian areas, brushlands, and disturbed areas. Brooms are a group of shrubs that were introduced into North America from Europe and North Africa in the mid-1800s.
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