Great Ragweed

Ambrosia trifida L. - Aster family

Size

Mature Height: Up to around 12.0 feet

Plant Type: Subshrub, Forb/herb

Features

Flower Color: Green, Brown

Bloom Time: Late Spring, Early Summer, Mid Summer, Late Summer, Fall

Conditions

Shade Tolerance: Tolerant

Native Range

  • USA:  Alabama, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode I., South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming
  • CAN:  Alberta, Manitoba, New Brunswick, Nova Scotia, Ontario, Prince Edward I., Québec, Saskatchewan
  • MEX:  Mexico Gulf, Mexico Northeast, Mexico Northwest
Regional Native Status: L48 (N), CAN (N)

State-level native status is based on data available through Plants of the World Online. Regional Native Status comes from the USDA Plants Database. For more detailed native status information, please refer to BONAP.