What Are the Best Plants for Garden Borders in Australia?

Garden borders have a habit of starting innocently.

You make a nice edge along the lawn, add a few plants, leave some room for them to grow and think, that'll be lovely.

Then you go to the nursery again.

Something flowering comes home. There's a gap, so another plant goes in. Somebody gives you something. You find a grass you love. A shrub gets squeezed into the end because surely it won't get that big.

Three years later the border has seventeen plant varieties, one enormous shrub leaning over the lawn and absolutely no recollection of what the original plan was.

This is not necessarily a bad garden. Some of the most beautiful gardens are gloriously full and a little bit wild. But if what you're after is a garden border that looks deliberate, flows through the landscape and doesn't require constant intervention, there's a much easier way to build one.

You need fewer plants than you think.

You just need more of each of them.

Before choosing plants, decide what the border is actually for

“Garden border” describes a shape, not a job. A border along a front path has very different requirements from one running along a driveway, around a lawn or across the front of a house. One might need to stay low so nobody trips over it. Another might need enough height to separate two spaces. You might want something neat and architectural, something soft and cottage-like, or simply a planted edge that stops the lawn and garden visually crashing into one another.

The conditions can change just as much. A border beside paving may get surprisingly hot. One beneath a roof overhang might be much drier than the rest of the garden because rainfall barely reaches it. A border around lawn may have to compete with turf creeping into it. Something beside a driveway needs to cope with reflected heat and shouldn't spend its life getting knocked by car doors.

So before you start searching for the prettiest border plant, stand where the border is going and ask what you need it to do.

Do you want a clearly defined edge? Do you want plants to spill slightly over it? How tall can they become before they're annoying? How wide is the bed? How much sun reaches it? And perhaps most importantly, do you want to clip it?

Because that last question changes everything.

A garden border doesn't have to be a hedge

I think this is where people sometimes get stuck.

We want definition, so we automatically think of a neat row of clipped shrubs. That can look fantastic in the right garden, but a hedge is only one way to make an edge.

You can create an incredibly strong border using strappy foliage, grasses, naturally compact shrubs or low spreading plants. In fact, if you're trying to create a lower-maintenance garden, choosing something that naturally sits around the height and shape you want can save an awful lot of clipping.

There is a difference between pruning a plant occasionally because it benefits from it and choosing a plant that desperately wants to be 1.5 metres high, then spending the next decade insisting it remain 40 centimetres.

I'd rather choose the 40-centimetre plant.

Little Jess™ Improved is almost made for this sort of job

There are plants that make considerably more sense once you stop looking at them individually.

Little Jess™ Improved Dianella is one.

One plant gives you a compact clump of fine, strappy foliage. Put a repeated run of them along the edge of a garden and suddenly the foliage creates a rhythm. You get definition without building a solid wall, and because the leaves move, the border feels softer than a clipped hedge.

This is particularly useful when the plants behind it are broader shrubs or groundcovers. Little Jess becomes the consistent line running through the planting while everything behind it is allowed to be a little looser.

That's one of my favourite ways to make a garden feel designed without making it feel formal.

Keep one thing consistent.

Let the rest breathe.

Just Right™ Liriope can do a similar job in a different garden

For suitable positions, Just Right™ Liriope gives you another way of creating a repeated strappy edge.

And this is where I wouldn't choose between plants purely on appearance. Conditions come first.

A border receiving brutal afternoon sun is a different proposition from one running through a more protected or partially shaded part of the garden. Soil, drainage and climate matter too.

The best border plant isn't the one with the nicest photograph.

It's the one you can repeat through that particular position and reasonably expect to perform.

Because repetition only looks clever when the plants are happy.

Seven miserable plants are still seven miserable plants.

Mini Mondo is brilliant when you want the border to almost disappear

Sometimes you don't want the border itself to be a feature.

You simply want a quiet little line separating a path, paving or garden bed.

That's where Mini Mondo becomes useful.

Its scale is completely different from something like a Lomandra or Dianella. Instead of creating a strong band of foliage, it can make a much finer, lower edge.

It takes patience. Tiny plants don't become a continuous border overnight, and planting density will affect how quickly you achieve the look. But once established in suitable conditions, that low repeated foliage can create a beautifully understated finish.

It works particularly well when there's already plenty happening behind it.

Not every layer of the garden needs to perform jazz hands.

Sometimes the best thing a plant can do is quietly finish the sentence.

Mondo gives you a little more presence

Ordinary Mondo Grass can take that same basic idea and increase the scale.

This is why it's worth thinking about plant proportions rather than simply deciding you want “a border plant”. A tiny edging plant might disappear beside large shrubs, while something too tall can make a small bed feel cramped.

The scale of the border should make sense with the scale of everything around it.

If you've got a narrow path and a shallow garden bed, keep things relatively fine. If you're edging a large lawn with deep planting behind it, you can afford something with more presence.

Gardens look better when the proportions make sense, even if we don't consciously know that's what we're noticing.

Grey Box™ gives you structure without needing a traditional box hedge

If you want something more substantial, Grey Box™ Westringia moves us into a completely different style of border.

Instead of strappy foliage, you get a compact shrub form and grey-green foliage. Repeated along a garden edge, it can provide structure without automatically turning the whole thing into a conventional hedge.

You can let individual plants retain more of their natural shape, or manage them more closely depending on the look you're trying to achieve.

This is particularly effective when the planting behind them is softer.

Imagine compact Grey Box repeated through the front with grasses, flowering perennials or looser native plants behind.

The border holds everything together.

It's a bit like putting a frame around a painting.

The frame isn't necessarily the thing you're staring at, but take it away and you notice something is missing.

Goldie Box™ can bring colour without another flower

Goldie Box™ Westringia is useful for exactly the same reason I keep banging on about foliage in garden design.

You don't need every bit of colour to come from a flower.

If you're building a long border, repeating a foliage colour can be one of the easiest ways to make the whole garden feel connected. Gold-toned foliage appearing along an edge can lift darker greens behind it and keep doing that when absolutely nothing is flowering.

This becomes particularly useful in winter or between flowering flushes.

A garden built entirely around flowers has good months and ordinary months.

A garden built around foliage has a structure all year, then flowers get to turn up and show off whenever they're ready.

I know which one I'd rather look after.

What if you want the plants to spill over the edge?

Then don't fight it.

A soft edge can be beautiful.

If the border isn't somewhere plants will create a trip hazard or interfere with vehicles, allowing a spreading groundcover to move towards the edge can make the garden feel much more relaxed.

Purple Fusion™ Scaevola is a good example of a plant that can soften a hard line in suitable conditions. Yareena™ Myoporum can create another spreading effect, while Aussie Rambler™ gives you a different low, broad form again.

This works particularly well against hard surfaces.

Paving is straight.

Concrete is hard.

Garden edging is often rigid.

A plant casually ignoring the last five centimetres of that line can be exactly what the whole area needs.

There's a difference between softening an edge and blocking a path, obviously.

Plants don't get diplomatic immunity because they're pretty.

Give them enough room.

Borders don't need to be one plant from beginning to end

This is where you can have some fun without creating chaos.

Suppose you've got a fifteen-metre garden edge. You don't necessarily need fifteen metres of the same thing.

You could establish a repeated plant as the main border — perhaps Little Jess or Grey Box — and then deliberately interrupt it in a few places.

Maybe a path cuts through.

Maybe a feature plant sits at the entrance.

Maybe a spreading groundcover takes over where the garden widens.

The trick is that the original plant appears again.

That return is what makes it feel intentional.

Think of it like a chorus in a song. You can go somewhere else for a while because eventually something familiar comes back and ties the whole thing together.

Gardens work remarkably well that way.

Please consider how wide the plant gets

We talked about mature width in our mass-planting article, and it's even more important along paths and lawn edges.

A plant that's 50cm high and 1.5 metres wide is still a 1.5-metre-wide plant.

If your garden bed is 60cm deep, something is going somewhere.

Usually onto the lawn.

Sometimes that's intentional. A little foliage spilling onto a broad path can look lovely. But if the lawn mower needs to fight through it every week or somebody has to turn sideways to get down the path, we've probably gone too far.

Read the width.

Measure the bed.

Then decide how much overlap you're actually prepared to live with.

This is a much better system than buying the plant first and discovering geometry later.

A border around lawn has another enemy: the lawn

Anyone who has tried to maintain a beautifully clean garden edge beside an enthusiastic running grass knows exactly where this is going.

The garden plants aren't always the difficult part.

Turf can creep into beds, particularly grasses that spread through runners or rhizomes. Once they're amongst the roots of your border planting, removal can become considerably more fiddly.

A physical edge can help in some situations, but the appropriate solution depends on the lawn species and garden design.

Either way, don't assume planting right to the lawn edge means edging and weed control disappear forever.

Low maintenance is not the same thing as maintenance having left the country.

We're trying to make the job easier.

Don't make the entire border the same height

This is particularly important if the border is part of a deeper garden bed.

If every plant from the path to the back fence is 50cm high, the whole garden can look flat.

Use the border as your first layer.

Then let the planting rise behind it.

A low edge of Mini Mondo could lead into compact shrubs and then taller planting. Little Jess might sit in front of Grey Box with something taller behind that. A spreading groundcover could occupy the lowest level while grasses emerge through it.

Now you're not simply decorating the perimeter.

You're building depth.

This is why I prefer thinking in layers rather than lists of plants.

A plant list tells you what to buy.

Layers tell you where everything belongs.

What about flowers?

Absolutely.

Just don't make every metre of the border responsible for producing them.

Plants such as Dianthus, Salvia, Lavender and other flowering plants suited to the site can sit beautifully within or behind a more consistent foliage edge.

You could also forget the permanent edge altogether and repeat flowering plants as the border itself if that's the look you love.

There isn't a Garden Border Police.

The useful principle is simply repetition.

Three Salvias appearing together have much more visual impact than one Salvia, one Dianthus and one completely unrelated plant all trying to occupy the same moment.

If you've found something that works, don't immediately reward yourself by choosing something different.

Use it again.

The cheapest-looking garden mistake has nothing to do with price

It's indecision.

You can spend a fortune on beautiful plants and still end up with a garden that feels unsettled because every decision was made independently.

Then you can walk past a garden planted with relatively ordinary plants — perhaps one repeated grass, one compact shrub and a flowering perennial — and it looks fantastic.

Why?

Somebody committed to the idea.

That's what a border can do for the rest of a garden. It creates a repeated element that makes all the other planting feel more deliberate.

You don't need expensive plants.

You need plants that fit the conditions, fit the space and are good enough to be worth repeating.

How many plants do you need for a garden border?

This is where you need two numbers: the length of the border and the spacing between plants.

If you're planting a ten-metre border and the chosen plant is appropriately spaced at 50cm centres, you'll obviously need substantially more plants than if the appropriate spacing is one metre.

But don't grab a generic spacing number from the internet and apply it to every cultivar.

Look at the mature size and recommended spacing of the actual plant you're buying. Consider whether you're aiming for a continuous edge or separated individual forms, and remember that plants spread in more than one direction.

For a linear border, the calculation itself is easy once the spacing is known.

Choosing the right spacing is the horticultural bit.

Tubestock is particularly good for long borders

This is another job where starting smaller can make financial sense.

If you need twenty or thirty repeated plants, the difference between buying advanced plants and healthy tubestock can become significant very quickly.

Tubestock also makes it relatively easy to create the repetition we're talking about without deciding halfway along the border that twenty of one plant suddenly seems terribly extravagant.

The compromise is time.

They need to establish and grow.

For a while, there will be gaps.

Mulch them appropriately, keep weeds under control, make sure water reaches the young root systems and resist the urge to fill every temporary space with something else.

A new border is allowed to look new.

Give it a chance.

So what should you plant along a garden border?

Start with the style you want and the conditions you've got.

If you want something extremely low and subtle, look at plants such as Mini Mondo. If you want strappy foliage and a stronger repeated line, Little Jess™ Improved Dianella or an appropriate Liriope might make sense. If you're after evergreen structure, compact Westringias such as Grey Box™ or Goldie Box™ become interesting. If you want a softer edge, consider spreading groundcovers such as Purple Fusion™, Yareena™ or Aussie Rambler™ where the conditions suit them.

Then repeat.

That's really the bit I don't want you to skip.

Because the secret to a beautiful garden border isn't finding the most extraordinary plant on the internet.

It's finding a really good plant for your garden and having enough confidence to use it more than once.

One plant is something you bought.

Twenty metres of it?

Now you've made a decision.