All Species

Hempnettle / Splitlip Hempnettle

Galeopsis tetrahit, Galeopsis bifida
Tom Heutte, USDA Forest Service, Bugwood.org

Why is it a problem?

  • Numerous seeds (up to 10,000 per plant) spread on shoes, tires, recreational equipment, wind, water, wildlife, contaminated crop seed, and farm machinery
  • Agricultural weed and garden nuisance
  • Forms dense stands on disturbed sites, forest edges, waterways, and meadows

How do I manage this plant?

  • Clean shoes and recreational equipment before travelling into natural areas
  • Plants can be pulled by hand (wear gloves), as they are shallow-rooted annuals; pull before plants set seed and place in trash bags for landfill disposal
  • After land clearing activities, reseed with native species to prevent hempnettle establishment
  • Take care of your soil! Fertilize to promote native grasses on lawns, or plant native shrubs to shade out hempnettle
  • This is an annual, so preventing seeds from maturing is key for control
  • Monitor for several years following removal

More info on species biology