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How to Reclaim a Pasture from Weeds

By Samantha Volz
Pastures overrun by weeds make poor grazing grounds for livestock.

The main purpose of a pasture is to feed livestock with healthy grass, but weed invasion can cause serious issues for farmers. Weeds consume nutrients, water and light otherwise reserved for the grass, and these pesky plants propagate so rapidly that an entire pasture can be consumed in only a few seasons. When facing a pasture covered with weeds, properly apply herbicides to kill the weeds and leave the ground open for new, desirous growth.

Mix 2,4-D, a general herbicide, and water into a sprayer tank. The amount of herbicide and water you need varies depending on the size of your land; in general, you should use 4 lbs. of herbicide for each gallon of water.

Spray the weeds with the herbicide mix in spring or early summer, when the weeds measure between 2 and 6 inches high. This is the point when the weeds are actively growing and will absorb the herbicide. The herbicide should directly contact as many of the weeds as possible.

Spread grass fertilizer at a rate of 100 lbs. of balanced fertilizer per acre (or at your regularly practiced fertilization rate), distributed evenly across the area. The fertilizer will feed the grass of the pasture and help it thrive as the weeds die. As the grass grows, it will use more nutrients and water, depriving these from the weeds.

Repeat application of herbicide and fertilizer in the fall if necessary. You must apply both herbicide and fertilizer at least two weeks before the first frost of the season to ensure the weeds are weak and the grass is strong before winter weather sets in.


Things You Will Need

  • 2,4-D herbicide
  • Sprayer tank
  • Fertilizer


  • Different herbicides may be more effective on different types of weeds. If you want specific information about your types of weeds and how to treat them, consult a local extension service, garden center or nursery.
  • If the weeds in your pasture are already more than 6 inches tall, add picloram or dicamba herbicides to the 2,4-D/water mixture for a more powerful combination.
  • It may take more than one season to eliminate all weeds in your pasture, depending on how widespread the infestation.


  • Keep all animals and children away from the pasture while you are treating it with herbicides. Never spray on a windy day, or the herbicides may be carried to areas where it can harm animals or desirable plants.

About the Author


Samantha Volz has been involved in journalistic and informative writing for over eight years. She holds a bachelor's degree in English literature from Lycoming College, Williamsport, Pennsylvania, with a minor in European history. In college she was editor-in-chief of the student newspaper and completed a professional internship with the "Williamsport Sun-Gazette," serving as a full-time reporter. She resides in Horsham, Pennsylvania.