Boosting revegetation on the Molonglo River Bridge project

The trial marks the first use of the product on an infrastructure project in the Australian Capital Territory, and one of the first trials nationally, showcasing its potential to simplify landscaping by replacing traditional soil treatments with a hydromulch application. Key benefits include improved soil quality and erosion control, ensuring uniform vegetation cover and reducing the cost of rework labour.

Landscaping during construction often relies on hydromulching to establish vegetation. However, when soil lacks nutrients or moisture, seed germination can fail, leading to costly rework. To address this challenge, BMD collaborated with Complete Turf and Landscaping to trial VE Organic-Matt, supplied by Vital Chemical.

The product incorporates Vital Biochar, a carbon-rich material created by heating sustainably sourced woodchip at high temperatures in low oxygen. Vital Biochar significantly improves soil fertility, produces carbon, retains water, and supports microbial activity, offering a more effective solution for rejuvenating topsoil.

The trial began in July 2024 on a 1200m² road embankment, where VE Organic-Matt combined with native grass seeds and rye corn, was sprayed over topsoil. The product created a thick protective layer that stabilised the soil, preventing erosion, and promoting germination.

Project Manager Sam Tindal shared that Canberra experienced predominantly dry conditions during this trial period. Following the application, there was light rain in August, a 20mm rainfall event in late September, three smaller 6mm events in October, and a 23mm event in November.

“Despite limited rainfall, the batter displayed strong signs of germination by mid-October, highlighting the product’s effectiveness in promoting vegetation growth even in tough conditions,” Mr Tindal attested.

“Through the proactive application of this biochar-based product, BMD is leading the way in adopting smart, cost-effective landscaping practices that are better for the environment.”

“By reducing the need for extensive soil treatments, this trial showcases BMD’s commitment to innovation, delivering environmental benefits while achieving outstanding project outcomes for our client,” he said.

Ongoing monitoring on the project will provide further insights into the long-term benefits of biochar-enhanced hydromulch applications and further advance innovative soil practices in the construction industry.