Welcome to Soil Supply Co.

We supply everything you need to build better soil

Organic soils, amendments, minerals and mulches you can trust. Every ingredient you need, all in one place. We give you the tools to build a stronger garden.
Build Your Soil
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Nutrients & Minerals

Know what your soil needs? Start here.
Leaf & green growth
Roots & flower
Fruit & resilience
Cell wall strength
Chlorophyll core
Proteins & enzymes
Greening & enzymes
Cell walls & stems
Micronutrient spectrum
We choose ingredients for quality, not convenience.

Popular Amendments

Minerals, meals, and microbial inputs to build real fertility from the ground up.
Oyster Shell Lime, organic soil amendment — Soil Supply Co.
Oyster Shell Lime
From $12.00
Raw Humates, organic soil amendment — Soil Supply Co.
Raw Humates
From $7.50
Kelp Meal, organic soil amendment — Soil Supply Co.
Kelp Meal
From $12.00
AD: 1 - 0.5 - 5 & DP: 1.5 - 0.2 - 7
Fish Meal, organic soil amendment — Soil Supply Co.
Fish Meal
From $10.00
8 - 7 - 0.5
Azomite, organic soil amendment — Soil Supply Co.
Azomite
From $8.00
Alfalfa Meal, organic soil amendment — Soil Supply Co.
Alfalfa Meal
From $6.50
3.4 - 0.3 - 3.4
Insect Frass, organic soil amendment — Soil Supply Co.
Insect Frass
From $15.00
3 - 2 - 3
Feather Meal
Feather Meal
From $9.00
15 - 0 - 0
Waterfall Way Basalt, organic soil amendment — Soil Supply Co.
Waterfall Way Basalt
From $8.00
Volcanic Ash, organic soil amendment — Soil Supply Co.
Volcanic Ash
From $6.00
We stock the best, or nothing at all.
Premium organic inputs, delivered to your door.
We keep costs low with simple packaging and a lean team, so you pay for quality—not marketing.
About Us
Amendments
Amendments 34 products
Soil Bases
Soil Bases 3 products
Drainage & Aeration
Drainage & Aeration 6 products
Mulch
Mulch 4 products
Experience nature's true power.

Liquid Concentrates

Hops Ferment
Hops Ferment
$15.00

Trusted by growers like you

Real results from people building better soil with our amendments.
Tom W.Port Macquarie, NSW

Was nervous about mixing my own soil but the amendments are all there and easy to follow. Mixed a batch, let it sit, and it's the best medium I've run. No deficiencies, no dramas. Proper gear.

Bree H.Bendigo, VIC

I just top-dress with their stuff now instead of bottled nutrients and my plants have never looked healthier. Way less mucking about and the soil actually feels alive. I'll be reordering again for sure.

Lachlan P.Adelaide Hills, SA

Worked out I was spending a fortune on bottled nutrients that ran out every few weeks. Switched to building soil with their amendments and it's cheaper over a season and way less hassle.

Meet High Powered Organics

Looking for a premium, pre-built range to power your garden? We have you covered.
GRO-DIRT
Organic Living Soils

GRO-DIRT

Biologically active and ready to plant straight from the bag.
Order Online
POWR-BOOSTERS
Growth & Bloom Boosters

POWR-BOOSTERS

Organic fuel for harder growth and heavier bloom — zero synthetics.
Order Online
GRO-BIOTICS
Microbes & Enzymes

GRO-BIOTICS

Living microbes and enzymes that switch your root zone on.
Order Online

Grow With Confidence

Practical guides, tips and soil knowledge to help every garden thrive.
Reading a Hungry Plant
July 8, 2026
Reading a Hungry Plant
A struggling plant is telling you exactly what it's short on, if you know where to look first. Here's how to read the signs, why it's usually lockout and not shortage, and which amendment actually fixes each real deficiency.
Building a Living Soil: A Starter Guide
July 8, 2026
Building a Living Soil: A Starter Guide
A living soil fertilises itself: build it once, feed the microbes instead of the plant, and reuse it for years. Here's what goes in, in what order, and why you don't need every amendment to get it right.
How Much Soil Do I Need?
July 8, 2026
How Much Soil Do I Need?
Most people order soil twice: a wrong guess, then a top-up delivery to finish the job. Here's the two-minute formula, and the depth guide, that gets you one number and one order.
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