/home/ctbotsoc/ct-botanical-society.org/app/webroot/
Connecticut Plants
Giant Ragweed
Ambrosia trifida L.
  • Family: aster (Asteraceae)
  • Habitat: roadsides, fields in moist soil
  • Height: 4-15 feet
  • Flower size: tiny
  • Flower color: green
  • Flowering time: August to October
  • Origin: native
Ambrosia trifida L.
Ambrosia trifida L.
Ambrosia trifida L.

Close-up of giant ragweed flowers.