What Size Hedge Trimmer Do You Need for Your Garden?

Blade length: the size that sets your pace

When people ask what size hedge trimmer to buy, they usually mean blade length. The blade is the toothed bar that does the cutting, and its length decides how much hedge you trim in one pass. A longer blade means fewer passes on a long, flat side.

Longer is not always better. A long blade is harder to steer around corners, small shrubs and tight spots. It also adds reach, which can make the tool feel heavier at arm's length.

A good rule is to size for your largest hedge, not your smallest. You can still trim a small shrub with a long blade, but a short blade on a long hedge means a lot of extra work. In our best hedge trimmer comparison, the ranked blades run from 17 in to 26 in.

Matching blade length to your garden

Use this table as a starting point. The ranges are general guidance, and the model examples come from the specs we compare.

If your garden has a mix, such as one long boundary hedge and a few small shrubs, lean toward the middle of the range. A 20 in to 22 in blade handles both reasonably well.

How thick a branch can a hedge trimmer cut?

Branch capacity, sometimes called cutting capacity, is the thickest stem the blades can cut without stalling or tearing. Among the models we rank, it runs from 0.625 in to 1.2 in. That is a fairly narrow range, and no hedge trimmer is a substitute for loppers or a pruning saw.

For soft, fast new growth, 0.625 in is enough. For older hedges with woody stems, look for 1 in or more. If you cut back thicker branches only once a year, it is often easier to use loppers for those and keep the trimmer for shaping.

Capacity and blade length do not always go together. The BLACK+DECKER 17 in corded model lists 0.625 in. The WORX 22 in model lists 0.75 in, and the CRAFTSMAN 20 in model also lists 0.75 in. The EGO POWER+ 26 in model lists the highest figure on our page at 1.2 in.

Size examples from the spec sheet

Here is how a few models from our comparison line up. Blade length, capacity and weight all come from published specifications.

Notice that the longest blade is not the lightest. The Greenworks 24 in model is the heaviest of these at 8.42 lb, and its listing does not include the battery.

Weight and power source matter as much as size

A trimmer that looks right on paper can wear you out. Weight among the ranked models runs from 3.9 lb to 8.42 lb. On tall or long hedges, extra weight shows up in your shoulders and forearms quickly.

Power source also changes what size makes sense. A corded model gives unlimited runtime but ties you to an outlet and a cord you must keep clear of the blades. A cordless model moves freely, but you need to check battery energy and runtime. For example, the EGO POWER+ lists a 140 Wh battery and 60 minutes of runtime, while the DocSmart lists 120 minutes at 4.4 lb.

Handle design helps too. A rotating handle lets you cut the sides and top at a natural angle, and dual-action blades can reduce vibration. Our best hedge trimmer page compares these features side by side. Gas models do not appear there.

Safety before you start

Hedge trimmers are sharp, fast and easy to underestimate. A few habits keep a routine job from turning into an injury.

• Wear safety glasses or goggles, sturdy gloves and long sleeves. Wood chips and leaf debris fly.
• Use hearing protection if your trimmer is loud, especially for long sessions.
• Keep both hands on the tool while the blades move, and never hold the hedge with your free hand.
• For corded models, keep the cord behind you and away from the blades. Use an outdoor-rated extension cord and avoid wet ground.
• Remove the battery or unplug the tool before clearing a jam or checking the blades.
• Do not trim from a wobbly ladder. If you cannot reach the top from the ground, consider a pole model or a stable platform, and ask someone to steady the base.
• Check the hedge for nests and wires or other hidden objects before cutting.

A quick way to decide

Work through these steps in order and the right size usually becomes clear.

• Measure or estimate your longest hedge and your tallest one.
• Choose a blade length that suits the longest hedge, then check that you can still handle it around corners.
• Check the thickest stems you expect to cut and pick a capacity above that.
• Choose corded or cordless based on how far your hedges are from an outlet.
• Compare weights and choose the lightest model that still meets your length and capacity needs.

Frequently asked questions

Can a hedge trimmer cut thick branches?

Only up to its listed capacity, which is 1.2 in at most among the models we compare. Anything thicker is a job for loppers or a pruning saw.

Which hedge trimmer cuts the thickest branches?

On our comparison page, the EGO POWER+ 26 in model lists the highest capacity at 1.2 in. The Greenworks 24 in and the 144 Wh battery model each list 1 in.

Is a bigger blade better for a small garden?

Usually not. A shorter blade of about 17 in to 20 in is easier to control around corners and small shrubs, and it tends to be lighter.

Does a cordless trimmer have enough power for a big hedge?

It can, but check battery energy and listed runtime. For a large hedge, a longer runtime or a spare battery helps, and a corded model avoids the issue entirely.