This time of year, stroll down the tool aisle of any garden center and you'll find a vast array of cutting instruments, all designed with the backyard gardener in mind. Blade heads of short-handled pruners and long-handled loppers usually come in two different styles: bypass and anvil.
Bypass loppers or pruners have a stainless steel curved blade that uses a scissors action to pass next to, not on top of, the lower surface, sometimes called the hook, designed to catch and hold the branch while the cutting blade comes down.
The cutting blade of anvil-style pruners comes down onto the center of a soft metal or hard plastic lower surface, called the anvil or table.
Bypass pruners offer a cleaner cut, as the blade slices all the way through the stem.
Anvil pruners tend to crush the soft tissue of the stem, stopping the flow of nutrients, prolonging the healing time for the cut surface.
Despite the bypass pruner's benefits, garden centers still offer a nearly equal number of anvil-style pruners and loppers, a never-ending source of confusion for the gardener hunting for cutting tools. So, we asked area garden experts their pruning preference: bypass or anvil?
Sacramento County Farm Advisor Chuck Ingels prefers bypass pruners. "I never use anvil pruners because you often can't cut close enough to the branch collar without leaving somewhat of a stub," says Ingels. "When they begin to wear, they often don't cut all the way through. Also, they crush the bark, which bypass pruners can do also, but you can turn the shears so the blade is closer to the collar and make a clean cut."
"I don't use and usually do not recommend anvil pruners," says Luanne Leineke, Community Shade Coordinator for the Sacramento Tree Foundation. "I tend to see too many wounded branches, particularly when the bark is soft. I suggest using bypass pruners for up to three quarters of an inch-thick branches, loppers for up to one inch thickness and a hand saw for anything larger."
Pete Strasser, former plant pathologist with Sacramento's Capital Nursery, has only one use for anvil pruners. "Anvils are for deadheading annuals, and that's about it."
Loren Oki, Landscape Horticulture Specialist with UC Cooperative Extension in Davis, also has limited use for anvils: "I was taught that bypass pruners were used on live material, whereas the anvil types were better for dead wood. The bypass type cuts cleaner through the softer material without causing much damage."
Steve Zien, owner of the Citrus Heights-based organic landscape consulting business, Living Resources, leaves no doubt to his preference: "I would never use anvil pruners! Never ever, unless something needed to be pruned right then and there, and it was the only tool I had beside my teeth."