How to Prune Pampas Grass
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Clip it as low as you can in mid to late winter
Pampas grass and other ornamental grasses look best when they get an annual pruning in mid to late winter. Trimming them back removes the brown blades and allows the new grass to come out looking fresh.
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Difficulty: Moderately Easy
Things You’ll Need:
Long sleeved clothing
Pampas grass and other ornamental grasses can be dangerous. The blades are sharp and can cause irritations and cuts on your arms and hands if you are not protected. Wear gloves, a long sleeved shirt and long pants.
Mid to late winter is the ideal time to prune grasses. That is generally before mid February in the southeast states (zones 7 and warmer). Grasses can add interest to a winter garden so avoid cutting them back too early. But it’s easier to trim them before new growth begins. Cutting the new growth will leave a discolored, blunt tip on the grass blade.
Clip the mound as close to the ground as you can, 12 inches would be best. I like to use hand pruners to be more accurate but hedge clippers or loppers would work too. Larger plants can even be cut back with a chain saw