How to Kill Weeds Between Cracks in Interlock


Weeds growing up between cracks in interlocking pavers or bricks can detract from the appearance of the walkway, driveway or patio. The weeds not only distract from the appearance, but the expanding roots can cause movement in the pavers. Killing the weeds and maintaining a clean interlocking paver surface can be accomplished with chemicals or other methods depending on the property owner's preference.

Things You'll Need

  • Garden hoe
  • Broom
  • Glysophate weed killer
  • Boiling water
  • Cut the weeds at the surface using a garden hoe. This is a temporary solution since the plant will regrow from the existing roots. Vigorous sweeping of the pavers can reduce the weed growth. Mechanical weed removal like this requires vigilance and repetitive efforts to be effective.

  • Spray the weeds with broad spectrum weed killing herbicide. Glysophate herbicides are effective on all plants. Limit this type of spray to areas where the chemicals won't wash into gardens or lawns. This will kill the weeds, but the dead plants remain in the cracks. Allow the herbicide to work until the plants are dead, then use a hoe to remove the plants.

  • Pour boiling water on the plants. A tea pot works well to heat the water and provides a spout for easy pouring. The boiling water kills the plants without the use of chemicals. Use a hoe to remove the plants. Boiling water may also kill seeds that are in the cracks of the bricks, working as a pre-emergent weed control system. It can also be used to control ants and other insects in the cracks.

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