Scotch broom is native to central/southern Europe and the Middle East. It has been introduced to Chile, India, Iran, Australia, New Zealand, South Africa and North America. It has become widely naturalized from California to British Columbia.
Introduced to Vancouver Island in 1850, broom grows prolifically in southwestern British Columbia throughout the Garry oak range and is also found in patches on the Queen Charlotte Islands and in some inland sites.
Additional Information here. Tips and Fact Sheet here.