For home gardens and orchards
WormGro
The original worm cast liquid, certified organic. A splash in the watering can is enough: 20ml in 10 litres covers 10 square metres of garden.
Explore WormGroAustralian Biological Fertiliser · Kookaburra Worm Farms
Grow more.Spray less.Prove it in the paddock.
WormGro is a worm cast liquid fertiliser alive with over one million microbial species. Farms using it have matched urea at lower cost, lifted yields up to 25%, and cut watering in half. Less synthetic fertiliser, healthier soil.
- 262 bales/acre · oats, Moffatdale QLD
- Urea-matched at lower cost · Wodonga VIC
- 4 waters down to 2 · lucerne, 16 acres
- Up to 80 chelated minerals
The problem with synthetics
Chemical fertiliser feedsthis season’s crop andstarves next season’s soil.
Every pass of urea buys yield now by burning through soil biology. Costs rise, structure collapses, water runs off instead of holding. The way back is not to farm harder. It is to put the biology back.
WormGro puts a living workforce back in your soil.
One application carries billions of beneficial microbes, the full spectrum of trace minerals, and the natural growth stimulants worms have made for half a billion years.
See how it worksWhat is WormGro?
WormGro is a worm cast liquid extract made by Kookaburra Worm Farms in Queensland. Each batch carries over one million species of beneficial microbes and up to 80 chelated minerals. Applied as a foliar spray or through irrigation, it rebuilds soil biology, frees bound phosphorus, and strengthens plants against pests, disease and drought.
The surface
Above ground you see the yield.
Healthy canopy, strong colour, bales stacking up. It starts a long way further down.
The root zone
Below it, roots follow the biology.
Freed phosphorus grows larger root systems and stress-resistant plants.
The cast layer
This is the engine: worm casts.
Over one million microbial species converting locked nutrients into plant-ready food.
Nature ran the trial for 500 million years. We bottled the result.
The range
One biology.Three ways to put it to work.
For broadacre and pasture
WormGro Plus
The same biology with a biological 10:10:10 NPK. On a Wodonga ryegrass paddock it matched 100kg/ha of urea at lower cost.
Explore WormGro Plus
Tailored to your soil test
WormGro Balance
Minerals plus microbes in one drum: N, P, K, S, calcium, magnesium and the traces, blended to what your paddock is actually short of.
Explore WormGro Balance
New
Australian Native Earthworm Eggs. Seed your soil with the workforce itself: 4kg per hectare, one pack covers 5 hectares.
Field results
We don’t argue with synthetics.We out-yield them.
262
bales per acre
Oats for hay, WormGro Balance only, $60/ha. Confirmed 24.10.2025.
25%
yield lift
Over traditional fertilisers in comparative field trials.
50%
less water
Irrigation reduction reported with worm cast products.
80
chelated minerals
Carried into your produce, and onto your plate.
Trials: 2021 Capsicum · 2022 Ginger · Macadamia orchard trial · Cross Family Farm
See the full trial resultsReal farms, real records
Word travels fast down a farm fence.
Oats for hay · 8ha · WormGro Balance 20L/ha foliar · $60/ha
“The oat hay came up so healthy. Other local farmers have been stopping to ask what I put on it, assuming I'd used heaps of urea. When I tell them it was only WormGro, they can hardly believe it.”
262 bales/acre, confirmed
Ryegrass pasture · 4ha · WormGro Plus 2 x 5L/ha
“One plot got 100 kg of urea per hectare, the other WormGro Plus. The results were just as good with WormGro, but it worked out a lot cheaper.”
Urea-matched at lower cost
Lucerne hay · 16 acres · 20L/ha
“Prior to application it needed 4 waters and produced 25 bales an acre. After WormGro, we needed only 2 waters and got up to 30 bales an acre.”
Watering halved, +5 bales/acre
Black Russian tomatoes · watering can · 30-50ml
“The tomato plants fairly jumped out of the ground. Just a splash in the watering can. A little goes a long way.”
Biggest tomatoes she'd grown
George Mingin · Founder
Since the beginning
Thirty years of worms.One farm in Queensland.
WormGro comes from Kookaburra Worm Farms, where founder George Mingin has bred compost worms and refined worm cast extracts for over three decades. The formulation follows Dr Elaine Ingham’s Soil Food Web science: feed the microbes, and the microbes feed the crop.
Read our storyYour questions, answered
Asked at the farm gate, answered straight.
Yes. WormGro reduces how much synthetic fertiliser you need rather than replacing it outright. Most growers supplement at least half of their chemical fertiliser in the first season and taper from there. WormGro Balance is blended against your soil test, so the paddock gets the N, P, K, S and trace elements it is actually short of, delivered with the biology that makes them available. Cut back at your own pace, guided by us.
Synthetics feed the plant directly and bypass the soil. WormGro feeds the soil ecosystem: microbes convert locked nutrients into plant-available forms, build structure that holds water, and prime plants' natural defences. The result compounds season on season instead of depleting.
Every crop trialled so far has responded: oats, ryegrass, lucerne, capsicum, ginger, macadamias, tomatoes, ornamentals and home gardens. It applies by watering can, boom spray, or fertigation.
Field applications run from around $60/ha, as in the Moffatdale oats result. That figure covered the full fertiliser program for the season: one 20L/ha foliar pass.
It is the smell of a live product. WormGro carries active biology, not a sterilised solution. The smell disperses quickly after application and is a sign the microbial load is intact.
Talk to the farm
Tell us what you grow.We’ll tell you what the biology can do.
Questions about rates, tank mixing, or cutting back on synthetics? Talk directly to the people who make it.
0427 573 424