Decorative Rocks, Pebbles & Gravel: Landscaping Ideas for Brisbane Gardens

Looking for a low-maintenance way to lift your garden? Decorative rocks, pebbles and gravel are the unsung heroes of Southeast Queensland landscaping. They help to suppress weeds, improve drainage and add texture and colour that lasts for years with almost zero upkeep. Rocks, Pebbles and Gravel, work well from dry creek beds and modern pathways to garden-bed toppings and driveway gravel.

In this article find practical ideas, and the right products (stocked at Rock N Soil), to bring your outdoor space to life! Every stone below is stocked at our Chandler yard, so you can see it wet and dry, in sun and shade, before you commit.  

Why decorative pebbles suit Brisbane gardens

Brisbane gardens swing between weeks of dry heat and summer storms that dump 50mm in an afternoon. Stone handles both.

• Drainage: water moves straight through, so beds don't puddle and paths don't turn to mud.
• Weed suppression: laid over weed mat at the right depth, pebbles block the light weeds need.
• Water-wise: stone holds moisture in the soil below and never needs watering itself.
• Near-zero maintenance: no rotting, no topping up every spring like bark mulch. A rake and an occasional blow-down is it.
  

Start with the right stone

Most of what you'll see in our yard falls into four groups. Knowing which one you need narrows the choice fast.

Rule of thumb on size: the more feet or tyres an area gets, the smaller and more angular the stone should be. Big rounded pebbles look great but roll underfoot.

Garden Pebbles as a Mulch Alternative

If you are living in Southeast Queensland, swapping bark for garden pebbles is the fastest way to make a bed look finished and keep it that way.

• Colour: white and light stones (Alpine White, Tumbled White) brighten shady beds and suit coastal and Hamptons-style homes. Dark stones (Tumbled Basalt, Blue Grey) make green foliage pop against modern rendered walls. Warm tones (Ablatio Sandstone, Caramel Swirl) sit naturally beside timber decks and Queenslanders.
• Size: 20–40mm is the sweet spot for beds. Big enough not to wash into the lawn, small enough to look even.
• Depth: 50mm for 20mm stones, 75mm for 20–40mm and larger. Any thinner and the weed mat shows through.
• Plants: leave a 100mm ring of bare mulch or soil around stems so stone doesn't sit against them, and choose plants that handle reflected heat if you go white.
  

Pebble pathways and side passages

A pebble path is cheap, quick and drains perfectly. The trick is choosing a stone you can actually walk on.

• Go small: 5–10mm stone such as River Gravel 10mm or Nambucca Stone 5–10mm. Anything 20mm or larger shifts underfoot.
• Or go firm: Deco (decomposed granite) compacts into a solid, natural-looking surface that's wheelbarrow and pram friendly.
• Contain it: steel or brick edging stops gravel creeping into lawns and garden beds.
• Add stepping stones: set stepping stones into the gravel for a path that feels designed rather than filled.
  For side passages that only get bins and the odd visitor, 10mm river pebble over weed mat at 50mm is the low-cost winner.
  

Gravel for driveways

Gravel for driveways is the most cost-effective way to surface a long or wide drive, and it lets storm water soak in rather than sheeting into the street. It only works if the base is right.

1. Excavate 150–200mm and remove grass and roots.
2. Lay geofabric (bidum) over soft or clay soil so the base doesn't sink into it.
3. Compact 75–100mm of road base in layers with a plate compactor. This is the part that carries the weight.
4. Top with 40–50mm of 20mm river gravel or compacted Deco.
5. Edge it with concrete, sleepers or heavy-duty steel to hold the shape.
   

Skip the road base and your gravel will disappear into Brisbane clay after the first big storm. Avoid large rounded pebbles on drives: they rut, roll and get caught in tyre tread.

Gravel driveway cross-section · 4 layers + edging

Skip the road base and the gravel has nothing to sit on; skip the bidum and the base sinks into Brisbane clay.

Dry creek bed ideas

A dry creek bed is landscaping that earns its keep. It moves storm water away from the house and looks like a natural stream bed the rest of the year.

• Follow the water: run it along the path water already takes, from a downpipe or a low spot to a lawn, garden or legal point of discharge.
• Dig a shallow swale 150–250mm deep with sloping sides, wider than you think. Twice as wide as deep looks natural.
• Line it with bidum to stop soil washing through.
• Layer the stone: 30–80mm River Gravel down the bed, 80–150mm and Natural River Rock up the banks, then two or three Sandstone Feature Rocks or granite boulders at bends.
• Plant the edges with lomandra, dianella or native grasses so it reads as a creek, not a ditch.
• Add a crossing: a few flat stepping stones or a small timber bridge makes it a feature.
  

Pots, courtyards and feature areas

Small spaces get the biggest lift from stone.

• Top-dress pots with polished stones or Emerald White. It locks in moisture, stops soil splashing and looks finished. A 20kg bag covers several large pots.
• Zen or courtyard gardens: one colour of 10–20mm gravel, raked, with a single feature rock and a sculptural plant.
• Around trees: a ring of pebbles stops mower and whipper-snipper damage and saves mulching under the canopy.
• Between pavers: fill joints in large-format pavers with 5–10mm gravel for a modern, permeable finish.
  

Landscaping rocks as focal points

One well-placed boulder does more than a dozen small ones. Use landscaping rocks to anchor a bed, mark an entrance or hold back a gentle slope.

• Bury a third: set feature rocks about a third into the ground so they look like they've always been there.
• Group in odd numbers: threes and fives, of different sizes, read as natural.
• Match the gravel: Sandstone Feature Rocks with Ablatio Sandstone, granite boulders with Salt and Pepper or Blue Grey.
  

Around pools

Stone around a pool keeps it clean and cool, but choose carefully.

• Rounded, not crushed: smooth tumbled pebbles are comfortable barefoot. Sharp crushed rock isn't.
• Light colours stay cooler in summer sun.
• Keep it out of the pool: use 20–40mm or larger near the edge, contain it with edging and keep a 300mm paved strip between pebbles and the coping.
• Check pool fence rules: keep large rocks well clear of the fence so they can't be used as a climbing aid.
  

Weed mat, edging and depth: the complete job

The stone is only one-third of a good result. Every pebble area needs:

1. Weed mat underneath to block weeds while letting water through. Overlap joins by 150mm and pin them.
2. Edging to hold a clean line and keep stone where you put it.
3. The right depth for coverage. Too thin looks patchy; too deep wastes money. 

Driveways go deepest because the road base does the work; pots need only a thin top-dress.

How much do I need?

As a quick guide, one cubic metre of stone covers about 20m² at 50mm deep, or about 13m² at 75mm. Measure length × width × depth in metres, add 10% for settling and uneven ground, and round up. For a step-by-step calculation, read our guide to working out how much landscaping material you need check out our blog post, How Much Soil, Mulch or Turf Do I Need? Your Brisbane Bulk Materials Guide or use our measurement guide.

Not sure? Bring your measurements to the yard and we'll work it out with you.

Come Visit the Chandler Yard. 

Come visit our Yard in Chandler to get an idea.

Where it started: the original yard, serving Brisbane since 1981.

Browse decorative pebbles online Get directions to the yard

FAQs – Rocks and Pebbles

Where can I buy decorative pebbles in Brisbane?

Rock 'N' Soil stocks decorative pebbles, gravel and feature rocks at our Chandler yard on New Cleveland Road, in bulk by the cubic metre or in 20kg bags. You can browse online, but we recommend visiting to compare colours in natural light, and ask for a sample while you're there. 

We deliver bulk across a wide area: checkout confirms your address, or call or email us if you're unsure.

What is the best gravel for a driveway?

20mm river gravel or compacted decomposed granite (Deco) over a 75–100mm compacted road base. The road base carries the load; the gravel is the finish. Avoid large rounded pebbles, which rut and get caught in tyre tread, and lay geofabric first on soft Brisbane clay so the base doesn't sink.

How deep should decorative pebbles be?

50mm for 10–20mm pebbles and 75mm for 20–40mm or larger, laid over weed mat. Paths need about 50mm of small stone over a compacted base, and pot toppings only 20–30mm. Too thin and the weed mat shows; too deep wastes money and makes paths hard to walk on.

Do I need weed mat under pebbles?

Yes, for garden beds and paths. Weed mat blocks light so weeds can't establish, while still letting water drain through, and it stops pebbles slowly sinking into the soil. Overlap joins by 150mm and pin them down. For dry creek beds and driveways, use heavier geofabric (bidum) instead.

How much does a cubic metre of pebbles cover?

About 20m² at 50mm deep, or about 13m² at 75mm deep. Multiply length × width × depth in metres to get cubic metres, then add 10% for settling. Bagged pebbles suit small jobs: a 20kg bag covers well under 1m² at bed depth, so buy bulk for anything bigger.

What size pebbles are best for walking paths?

5–10mm pebbles such as River Gravel 10mm or Nambucca Stone 5–10mm, or compacted Deco. Small stones settle into a firm surface and stay comfortable underfoot, while 20mm and larger shift with every step and are hard to push a wheelbarrow through. Contain path gravel with garden edging so it doesn't spread into lawns and beds.

What rocks are best for a dry creek bed?

A mix of rounded river stone in several sizes: 30–80mm River Gravel along the bed, 80–150mm River Gravel and Natural River Rock on the banks, plus a few large feature rocks at the bends. Mixing sizes looks natural and holds up to storm flow. Line the trench with bidum first so soil doesn't wash through.