How to Prune Pampas Grass

Cortaderia selloana

Reviewed by Kiersten Rankel M.S.

Quick Answer

Cut Pampas Grass back hard to about 12 to 18 inches above the ground in late winter, just before new growth emerges. This annual cutback removes the dead interior, refreshes the clump, and keeps the plant from sprawling. Always wear thick gloves and long sleeves -- the leaf edges are razor-sharp.

When is the best time to prune?

Pampas Grass (zones 7–11) is cut back in late winter before new growth begins, with timing ranging from January in the Southeast to March or April in cooler inland regions.

Pacific

Feb–Mar

Mountain

Mar–Apr

Midwest

Mar–Apr

Northeast

Mar–Apr

Southeast

Jan–Feb

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Why Should I Prune My Pampas Grass?

Pampas Grass builds up a thick mass of dead brown leaves in the center of the clump every year. Without an annual cutback, this dead material accumulates, the clump gets untidy and sprawling, and the plant loses its attractive form. Cutting it down hard in late winter is the single most important maintenance task for this plant.

The goal is to cut the entire clump back to about 12 to 18 inches from the ground before new green growth starts pushing through. This gets rid of all the dead interior and the old plumes from the previous year. Within weeks of cutting, bright green new leaves emerge from the base and the plant fills back in quickly.

Safety is non-negotiable here. Pampas Grass leaves have microscopic serrations along the edges that cut skin easily. Wear thick leather gloves, long sleeves, and eye protection every time you work with this plant. Many gardeners tie the clump with rope or bungee cords before cutting to keep the leaves bundled and controlled.

A string trimmer or reciprocating saw makes the job much easier than hand pruners on a large clump. For small potted plants, sharp pruners work fine.

Know Before You Cut

Difficulty Moderate

Max removal Cut entire clump to 12–18 inches above ground

Growth pattern Dense clumping grass

Tools Gloves, loppers, or saw

What Should I Remove?

Wear thick leather gloves and long sleeves before starting

Bundle the clump with rope before cutting to control leaves

Cut the entire clump to 12–18 inches above ground

Remove all cut material from around the base

Cut in late winter before new green growth emerges

Don't cut back in fall -- old foliage protects the crown in winter

Don't use bare hands or short sleeves -- leaves cause serious cuts

How Do I Prune Step by Step?

Gear up before you touch the plant

Put on thick leather gloves, long sleeves, long pants, and eye protection. Pampas Grass leaves have razor-sharp edges that cut bare skin without warning.

Bundle the clump with rope or bungee cords

Wrap rope or a bungee cord around the clump at a comfortable working height. This keeps leaves bundled together while you cut and makes cleanup much easier.

Cut the clump to 12–18 inches from the ground

Use loppers, a reciprocating saw, or a string trimmer to cut across the entire clump at your target height. Work in sections on large clumps if needed.

Remove all cut material

Drag the bundled cuttings away from the plant and dispose of them. Clear any remaining debris from around the crown so air can circulate as new growth emerges.

Leave it alone until new growth appears

Don't fertilize immediately. Wait until you see new green blades pushing up from the crown, typically two to four weeks after cutting. Then resume normal care.

Got More Questions?

Can I prune Pampas Grass in fall after the plumes fade?

It's better to wait until late winter. The old foliage insulates the crown from hard freezes, especially in zones 7 and 8. Cutting in fall removes that protection. Late winter cutback is the standard for good reason.

I cut my Pampas Grass too short. Will it recover?

Usually yes, as long as you didn't damage the crown at the soil line. Pampas Grass is resilient and will push up new growth even from a very hard cutback. Give it consistent water and good light through spring.

How do I prune Pampas Grass without getting cut?

Thick leather gloves, long sleeves, and bundling the clump before cutting are the three key precautions. Many people also wear safety glasses since leaves can whip toward your face when disturbed.

My Pampas Grass clump is huge and I can't get through it with pruners. What should I use?

A reciprocating saw, chainsaw, or string trimmer with a blade attachment makes quick work of large clumps. Pruners are fine for young or small plants but aren't practical for mature clumps.

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About This Article

Kiersten Rankel M.S.

Botanical Data Lead at Greg · Plant Scientist

About the Author

Kiersten Rankel holds an M.S. in Ecology & Evolutionary Biology from Tulane University. A certified Louisiana Master Naturalist, she has over a decade of experience in science communication, with research spanning corals, cypress trees, marsh grasses, and more. At Greg, she curates species data and verifies care recommendations against botanical research.

See Kiersten Rankel's full background on LinkedIn.

Editorial Process

Pruning guidance verified against Cortaderia selloana growth data from Greg's botanical database, cross-referenced with USDA hardiness zone data and published horticultural research.

398+ Greg users growing this plant

USDA hardiness zones 7a–11b

Citations:
NC State Extension
Missouri Botanical Garden
Royal Horticultural Society

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