Alliaria petiolata (garlic mustard)

• ODA “B” rank species (ODA ranking page)

Garlic mustard, a European native, was introduced to North America and regionally as a garden herb. In general, it is considered a biennial, needing two growing seasons to produce seed, although local land managers have seen many exceptions to this rule. Environmental Services is collaborating with the following jurisdictions and entities to manage the spread of garlic mustard in the Portland region:

• Portland Parks & Recreation
• West Multnomah Soil & Water Conservation District
• East Multnomah Soil & Water Conservation District
• Clean Water Services
• Johnson Creek Watershed Council
• City of Gresham