One Tool, Two Very Different Cutting Actions
Every pair of pruning shears cuts in one of two ways: bypass or anvil. Understanding the difference is the most important thing you need to know before buying. Using the wrong type for your plants causes damage that can take years to show up.
Bypass Pruners: The Standard for Living Plants
Bypass pruners work like scissors — two curved blades pass each other to make a clean, precise cut. The cutting blade slices through plant material while the counter blade supports it. This clean scissor action causes minimal tissue damage and is the correct choice for any cut on living plants: deadheading, pruning, harvesting, and all general-purpose garden cutting.
Anvil Pruners: For Dead Wood Only
Anvil pruners have a single straight blade that closes down onto a flat metal plate (the anvil). This creates enormous cutting force — ideal for dead branches and thick, dried wood. However, the anvil design crushes plant tissue slightly on both sides of the cut. On living plants, this bruised tissue is an entry point for disease and slows healing. Use anvil pruners only for dead wood removal.
What to Look For in Bypass Pruners
- Blade material: High-carbon steel holds an edge longer than stainless. Many quality brands use Japanese steel (SK-5 or similar).
- Spring mechanism: A quality spring opens the pruner smoothly after every cut, reducing hand fatigue. Look for replaceable springs.
- Safety lock: A reliable safety lock keeps blades closed during transport and storage.
- Maximum cutting diameter: Most standard pruners handle stems up to 3/4 inch. Heavy-duty models go to 1 inch. For larger branches, use loppers or a pruning saw.
Maintenance Extends Life Dramatically
Wipe blades with an oily rag after each use. Sharpen with a diamond file when the blade starts tearing rather than cutting cleanly. Disassemble and clean the pivot bolt annually. A well-maintained $40 pair outperforms a neglected $100 pair every time.
Frequently Asked Questions
How do I know when my pruners need sharpening?
If the blade crushes or tears stem tissue rather than cutting cleanly, it is time. Sharpen about every 20-30 hours of use, before you reach that point ideally.
Can I use pruning shears on thick branches?
Pruning shears are rated for stems up to 3/4 to 1 inch. Forcing them on thicker material damages both the blade and the plant. For branches 1-2 inches, use loppers. For larger branches, use a pruning saw.
How should I clean pruners after use?
Wipe off sap with rubbing alcohol — sap is sticky and corrosive if left. Dry thoroughly. Apply a thin coat of tool oil to the blade. This takes 30 seconds and dramatically extends blade life.
Are rotating handle pruners worth the extra cost?
For high-volume cutting — deadheading a large perennial garden, harvesting crops — yes. The rotating handle reduces the repetitive twisting that causes carpal tunnel and hand fatigue.
What is the difference between pruning shears and secateurs?
They are the same tool. Secateurs is the British term; pruning shears is common in North America.