How to Sharpen Cutting Shears | Restore a Razor Edge

Dull shears crush stems instead of slicing them, leaving ragged cuts that invite disease into your plants. Whether you’re tidying up bypass pruners or tackling overgrown hedges, the process takes about ten minutes per tool and needs only a sharpening file or stone, a cloth, and light oil.

What You Need Before You Start

Gather a sharpening file (a flat mill file or a carbide sharpener works), a wire brush or stiff cloth, penetrating oil or lubricant, and heavy gloves. Work in a well-lit area and stabilize the tool in a bench vise or against a solid surface.

Clean the blades first. Sap and dried plant residue will clog your file and leave a rough edge, so scrub both sides with the brush and wipe them dry. Skipping this step is one of the most common mistakes — you end up polishing dirt instead of cutting steel.

Sharpening Bypass Pruning Shears

Bypass shears work like scissors: one sharpened blade slides past a thicker, unsharpened one. Only the beveled cutting blade gets sharpened; the flat blade stays untouched.

1. Disassemble the shears if the pivot bolt allows it. This gives you full access to the blade and keeps the file from striking the opposing edge.
2. Identify the bevel — the angled, ground surface that leads to the cutting edge.
3. File the beveled side only, matching the existing angle. Push the file in one direction, away from your body, from the base of the blade toward the tip. Do not saw back and forth — that rounds the edge and shortens its life.
4. Continue until a burr appears. You’ll feel a thin, rough lip of metal along the flat back side of the blade. That burr tells you the edge is sharp.
5. Remove the burr by lightly passing the flat back side across the stone or file once or twice. This is a light touch — you want to knock off the burr, not create a new bevel.

Reassemble the shears, then apply a drop of oil to the pivot and moving parts. This restores smooth motion and prevents rust on your freshly exposed steel.

If your existing shears are beyond saving or you’re shopping for a new pair, our tested roundup of the best cutting shears compares the top-rated bypass and anvil models side by side.

Sharpening Hedge Shears

1. Hold the shears open so both blades are exposed. No need to disassemble for this tool.
2. Keep the cutting edge uppermost, with the bevel facing you.
3. Place the sharpener against the inside of the blade — the body of the file or carbide sharpener rests against the flat inner surface while the cutting corner meets the bevel.
4. Work from the base toward the tip in one direction, keeping the sharpener at the factory angle. Repeat on the opposite blade.

The flat inner side of each blade holds the burr after sharpening, so remove it with a few light passes, then oil the pivot and both blades.

Common Sharpening Mistakes to Avoid

Four errors cause most ruined blades. Sharpening the wrong side — usually the flat back instead of the bevel — creates a dull, rounded edge that won’t cut. Sawing back and forth instead of one-direction strokes leaves a ragged edge. Changing the factory angle by tipping the file steeper or shallower than the original bevel makes the edge fragile or ineffective. And skipping burr removal leaves a fragile wire edge that folds over on the first cut, undoing your work.

Match your technique to the tool, and your shears will slice through stems cleanly all season.