Controlling Black Grass – The Facts

Black Grass- Land Drainage Effects


  • Major Weed Of Cereal Crops which produce a large amount of seed.
  • Major problem to most UK Farmers, particularly on the Eastern side of the country where cereals are intensively grown.
  • Developed a resistance to a range of herbicides.
  • Occurs at a very high densities.
  • Reduces yield of crops if not controlled.
  • Thrives on heavy land, particularly where drainage is poor and soils are wet.
  • Blackgrass is favoured in Water Retentive Soils
  • 80% of seeds germinate in Autumn, peaking in Sept & Oct
  • Seed is shed before harvest thereby replenishing the soil seedbed.


    • During Land Drainage Surveys and discussions with clients, we have discovered a common link between Black Grass & Drainage.
    • Many poorly drained areas, suffer with high volumes of Black Grass.
    • Well drained fields hold no signs of Black Grass.
    • Visually seeing large areas of Black Grass, its easy to spot client drainage issues.
    • We have visited schemes post drainage installation and there has been no sign of returning Black Grass, especially in areas where once previously affected.
    • Discussions with clients indicate no further problems after they have invested with land drainage.
    • Land drainage investment returns improvements in yield. No black grass provides stronger yield results.
    • All reports, assessments, experiments that we have researched on Blackgrass, mention effectively┬ádrainage fields control growth.
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