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Soil · 5 min read

Garden soil, under turf soil or top dress: which do I need?

Different jobs need different soils. Pick the right one and your lawn or garden gets off to a much better start.

By the Bulk Landscape Supplies Brisbane team · Last reviewed 1 October 2026

Quick match: job to soil

JobWhat to useTypical depth
Laying new turfUnder Turf Soil or Premium Under Turf Soil100–150mm
Levelling an existing lawnUSGA Top Dress Sand or Fertilised Top Dress5–10mm per application
Vegetable gardenUltra Premium Veggie Mix or Veggie Mix Organic Garden Soil200–300mm
New flower or shrub bedsPremium Garden Soil200–300mm
Raised garden bedsUltra Premium Veggie Mix or Premium Garden SoilFill to the top, allowing for settling
Synthetic grass basePremium Under Turf Soil100–150mm

Under turf soil

Under turf soil is a light, free-draining base for new lawns. It spreads and levels easily and gives turf roots somewhere to grow. See our guide to preparing the ground for new turf.

Top dress

Top dress is spread thinly over an existing lawn to fill hollows and level the surface. Spread 5–10mm at a time so the grass can grow through, and repeat if needed. Our top dressing guide walks through it.

Garden soil

Garden soils carry more organic matter and nutrients for beds and veggie patches. For edibles, choose a veggie mix; for general flower and shrub beds, Premium Garden Soil drains freely and suits most plants. Dig or blend the new soil into the existing ground rather than leaving a hard layer underneath.

Common questions

Can I use garden soil under turf?

Under turf soil is better. It is lighter, drains more freely and is easier to level, which suits turf roots.

How deep should soil be for a vegetable garden?

Allow 200–300mm of a veggie mix so roots have room to grow.

What is the difference between top dress and under turf soil?

Under turf soil goes under new turf, 100–150mm deep. Top dress is spread thinly over an existing lawn, 5–10mm at a time, to level it.

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