Weed of the Week: Scotch Broom The 19th century brought about
more than the popularity of brick ovens among bakers,
consumption of imported whiskey among gold miners, and trading
of ornamentals among gardeners. Trading among settlers also
drove the invasion of Scotch broom (Cytisus scoparius ) into
North America, which, after more than 150 years since it was
introduced, is still rapidly invading coastal regions of British
Columbia. Originally planted along highways to prevent soil
erosion, Scotch broom has spread far beyond the bounds of
cultivation and is now considered an invasive plant. Invasive
plants grow rapidly and spread quickly, causing damage to the
environment, economy and our health. They are also the second
greatest threat to biodiversity after habitat loss, according to
the International Union for Conservation of Nature (IUCN). Many
invasive species, including Scotch broom, contain toxins that
can sicken livestock and people when ingested. People tend to
rush for the medicine cabinet to combat t