Recycled glass bottles could help Australian farmers weather fertiliser crisis

Australian farmers are scrambling. Urea prices have more than doubled heading into the April seeding window, supplies are tight, and with up to 40 per cent of surface-applied fertiliser lost before crops can even absorb it, growers are burning through an input they can barely afford to waste.

A Brisbane-based company thinks it has an answer — and it starts with your recycled glass bottles.

MaxSil, a patented silicon fertiliser made by the Sustainable Concrete Group in Brendale, north Brisbane, is manufactured from waste glass collected by recycler, Bincoin.

The glass is processed into ultra-fine silica and applied to crops, where it is designed to help plants absorb nitrogen, phosphorus and potassium more efficiently by improving root architecture and soil pH balance.

But the product's most striking claim is what it can do with phosphorus that's already in the ground. Australian soils contain an average of 980 kilograms of phosphorus per hectare that are chemically locked and unavailable to plants.

At typical application rates of around 50 kilograms per hectare per season, that's nearly 20 seasons' worth of fertiliser sitting dormant beneath farmers' feet. MaxSil's founders say their product can help unlock it.

"With fertiliser supply constrained, farmers can't afford to waste inputs," said agronomist and MaxSil's founder, David Archer. "MaxSil is designed to make every kilogram of fertiliser count, right now, during the critical seeding window."

Field trials suggest the product contains 36 times more plant-available silicon than competing products. In some trials, crops treated with MaxSil alongside half the standard fertiliser input achieved equivalent or higher yields than full-fertiliser programs — a compelling proposition for farmers rationing supplies this season.

The timing is pointed. Australia sources around 90 per cent of its fertiliser from overseas, and a Federal Government working group established this month is actively exploring domestic alternatives. MaxSil is positioning itself squarely in that conversation.

Co-founder Oscar Ledlin frames it simply: "Recycled glass. Local jobs. Better yields."

The product is available nationally in powder and granule form through agricultural resellers and directly via MaxSil.com.au.