This winter annual plant is native to tropical regions of North Africa, temperate regions of Europe, and parts of Asia. In California, this invasive weed is common in coastal areas at lower elevations. In disturbed areas such as roadsides, fields, and grasslands this plant forms single-species stands.
Irvine Ranch Conservancy and its partners, OC Parks, City of Irvine and the City of Newport Beach, work diligently to help stop the spread of black mustard on the Landmarks. Volunteers interested in helping with the removal of black mustard and other invasive plants can sign-up for stewardship activities on LetsGoOutside.org.
For more information about the Landmarks, visit IRConservancy.org or follow the Landmarks on Facebook, Instagram and Twitter.