Grass Trimmer vs Lawn Mower – Do You Need Both?

Or is one enough to get the job done?

Let’s be honest, if you’ve just bought a lawn mower (or you’re about to), you’ve probably asked yourself: “Do I actually need a grass trimmer as well?”

It’s a fair question. After all, a lawn mower cuts grass… so surely that’s enough?

Well, not quite.

Where a Lawn Mower Falls Short

No matter how good your mower is, there are always areas it simply can’t reach. You’ll notice it straight away:

• Grass left around fence lines
• Edges along patios and paths
• Around trees and shrubs
• Tight corners and awkward angles

You finish mowing, stand back, and think “That still looks a bit messy.” That’s completely normal. It’s not your mowers fault, it’s just not designed for that level of detail.

What a Grass Trimmer Does Differently

This is where a grass trimmer comes in. Think of it as the detail tool, the bit that finishes everything off properly.

Instead of trying to cover big areas, a trimmer is designed for accuracy and control. It lets you get into all those places your mower can’t reach without damaging anything around it. That’s why once people start using one, they rarely go back to just using a mower.

Do You Need Both?

Short answer? If you want a tidy, finished lawn, yes. Here’s why.

When a Lawn Mower Isn’t Enough

Even the best lawn mower can’t:

• Cut right up to edges
• Get into corners
• Trim along fences
• Tidy borders

If you skip trimming, your lawn will always look slightly unfinished. It’s like vacuuming the middle of a room and ignoring the edges.

Edging Lawns (This Is the Big One)

This is where grass trimmers really earn their place. You might not notice edging when it’s done well, but you definitely notice when it’s not. A clean edge is what gives a lawn that sharp, defined look. Without it, grass starts creeping over paths, borders blur, and everything looks slightly untidy.

With a trimmer that has an edging function, you can:

• Create clean, straight lawn edges
• Define borders between grass and paths
• Keep everything looking neat week after week

It’s a small detail that makes a big visual difference.

Cutting Along Fences and Walls

This is one of the most common problem areas. Mowers can’t get close enough without:

• Hitting obstacles
• Missing strips of grass
• Leaving uneven edges

A grass trimmer solves this instantly. Lightweight cordless models like the LT G30 or LT C25 make it quick and easy to tidy these areas in seconds.

Borders, Trees and Raised Beds

If your garden has any kind of features, and most do, this is where a trimmer really proves its worth.

Think about:

• Flower beds
• Trees
• Decorative borders
• Raised planters

These are all areas where you want control, not power. A trimmer lets you carefully cut around them without damaging plants, especially if it has a plant guard, which is a lifesaver during spring and summer.

The Perfect Lawn Finish

This is the real difference. A lawn mower gives you the base cut. A grass trimmer gives you the finish. And once you see the difference, it’s hard to ignore.

Without trimming:

• Edges look rough
• Grass creeps into borders
• The lawn feels unfinished

With trimming:

• Clean edges
• Sharp borders
• A much more polished look

It’s the difference between a lawn that looks maintained and one that looks properly cared for.

Quick Comparison

So… Do You Need Both?

If your goal is just to cut the grass quickly, a mower is enough. But if you want your garden to look like you’ve actually taken the time to finish it properly, then yes, you’ll want both. Most people don’t realise how much difference a trimmer makes until they use one for the first time. After that, it becomes part of the routine.

The Ideal Setup

For most UK gardens:

• A cordless lawn mower for the main cut
• A lightweight cordless grass trimmer for edges and detail

That combination gives you:

• Speed
• Control
• A much better finish

Final Thoughts

A lawn mower and a grass trimmer don’t compete, they work together. One handles the bulk of the job. The other makes it look right, and once you’ve done a full mow and trimmed the edges properly, you’ll notice the difference straight away. To make your life easy, we have two twin pack options our 40V 32cm Cordless Lawnmower & Trimmer Twinpack and our best-selling 20V 33cm Cordless Lawnmower & Trimmer Twinpack.

Helpful Guides

• Ultimate Guide to Choosing a Lawn Mower in the UK
• How to Choose the Right Grass Trimmer
• Best Lawn Mower for Small Gardens

Ready to Finish the Job Properly?

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