All Species

White Sweetclover

Melilotus alba
Photo by: Rob Routledge, Sault College, Bugwood.org

Why is it a problem?

  • One plant produces up to 350,000 seeds, which remain viable in soil for up to 80 years
  • Quickly colonizes disturbed areas, roadsides, and riverbanks; spread by waterways & equipment
  • Alters sedimentation along rivers, outcompetes native plants, and degrades native grasslands
  • Produces chemicals that inhibit the growth of other plants (allelopathic)
  • Resprouts aggressively when cut or grazed; can be toxic to wildlife if grazed heavily
  • Disrupts native pollinator habits

How do I manage this plant?

  • If soil-disturbing activities take place, reseed with native species
  • Clean vehicles and equipment before leaving an area with an infestation
  • Pulling and cutting are effective, but require several treatments and long-term monitoring due to a long-lived seed bank
  • For very large infestations, chemical treatment is most effective when used in combination with other control techniques

More info on species biology