- 1). Don long pants, long sleeves and thick work gloves before attempting to kill the pampas grass, since the edges of the grass blades are sharp and can cut skin.
- 2). Cut off as much of the upper foliage as possible so that you can access the root system. Cut the blades 1 to 2 inches above the ground using pruning shears or, if necessary, a chain saw. Wear safety glasses when cutting down the foliage.
- 3). Pour the recommended amount of a glyphosate-based product into a large handheld sprayer and then add enough water to dilute the herbicide to a 2 percent solution.
- 4). Add a nonionic surfactant to the sprayer in the amount indicated on the label. This substance helps the herbicide stick to the pampas grass. Close the sprayer and shake it gently. Saturate the entire exposed area of the pampas grass with the herbicide mixture.
- 5). Wait six to eight weeks and then examine the pampas grass roots for new growth. If new green blades are emerging, reapply the herbicide solution. Again, wait several weeks and recheck the grass. Add another herbicide treatment if the plant is still growing.
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