WA soil profiles

The state’s growing conditions vary more than most people plan for.

A program built for Karrakatta sand won’t hold up on wheatbelt clay. Here’s a snapshot of four soil types we work with regularly.

SWAN COASTAL PLAIN

Karrakatta sand

Topsoil
Bleached sand
Weak B horizon

Free-draining, low organic matter, and prone to nutrient leaching. Common across Perth’s horticultural belt — needs frequent, lighter nutrient applications rather than large infrequent ones.

pH 5.5–6.5Low CECFast drainage
DARLING RANGE

Lateritic gravelly soil

Topsoil
Ironstone gravel
Pallid clay zone

Shallow topsoil over ironstone gravel and a deep weathered clay zone. Restricts root depth and vertical drainage — a common driver of waterlogging and disease pressure in orchard crops.

pH 5.0–6.0Restricted drainageVariable depth
WHEATBELT

Cracking clay (vertosol)

Topsoil
Self-mulching clay
Calcareous subsoil

High shrink-swell clays that crack deeply when dry. Strong nutrient-holding capacity, but structure and workability are the limiting factors, particularly after heavy rain.

pH 7.0–8.5High CECShrink-swell
SOUTH COAST / ESPERANCE

Sandplain soil

Topsoil
Deep siliceous sand
Weak clay base

Deep, uniform sands historically limited by water repellence and trace element deficiency. Responds well to targeted soil-conditioning and precision nutrient placement.

pH 5.5–6.5Water repellentTrace deficient

Profiles shown are indicative and simplified for illustration. Every site we assess gets its own laboratory-verified profile — regional soil surveys are a starting point, not a substitute for testing.

We test and sample across all of Western Australia.

From the Swan Coastal Plain to the wheatbelt and the south coast — send a sample or ask us about on-site collection wherever you’re based.

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