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Quick tips for ordering mulch
Mulch depth guide
75–100 mm is the sweet spot for weed suppression and moisture retention. Less than 50 mm won't suppress weeds effectively.
Typical trailer capacities
6×4 trailer ≈ 0.7 m³ | 7×5 trailer ≈ 1.2 m³ | Ute tray ≈ 0.5 m³. Don't overfill — check your load limit.
Bags vs bulk
Bulk delivery is cheaper above 1 m³. Under 1 m³, bagged from a hardware store is often more convenient and similar in cost.
Order a little extra
Add 10–15% to account for settling, uneven ground, and edges. It's easier than a second trip to the yard.
Common questions
How do I calculate how much mulch I need?
Multiply your area in square metres by the depth in metres. A 20 m² garden bed at 75 mm depth needs 20 × 0.075 = 1.5 m³ of mulch. This calculator does that maths automatically across multiple areas and different shapes.
How many bags of mulch in a cubic metre?
One cubic metre equals 1,000 litres. A standard 30 L bag gives you about 33 bags per m³. A 40 L bag gives about 25 bags per m³.
How much does a cubic metre of mulch cost?
Bulk mulch typically ranges from $45 to $90 per m³ depending on the type — pine bark, woodchip, or premium decorative mulches vary in price. Enter a price in the calculator above to get an estimate for your job.
How deep should mulch be?
75 mm is often a good target depth — deep enough to retain moisture and suppress weeds without smothering plants. Top up annually as mulch breaks down.
How many trailer loads do I need?
A standard 6×4 trailer holds around 0.7 m³. A 7×5 holds about 1.2 m³. Select your trailer size in the calculator and the number of loads is calculated automatically.