Onset 10GR Granular Preemergent Herbicide

Onset 10GR – Pre-Emergent Lawn Weed Control (Granular)

Stop weeds before they start.
Onset 10GR is a granular pre-emergent herbicide powered by Prodiamine (10 g/kg) for long-lasting protection against grassy weeds like Crabgrass, Summer Grass, Crowsfoot, Paspalum, Parramatta Grass, African Love Grass and Wintergrass. It forms a protective barrier in the soil that stops new weeds from germinating while allowing your established lawn to thrive.

Coated on a silica-based granule containing 26% plant-available silicon, Onset 10GR not only delivers up to 6 months of weed prevention but also supports stronger cell walls, improved nutrient uptake and greater stress resistance — helping turf stay dense, green and healthy all season long.

How much to apply:
Apply 0.5–1.5 kg per 100 m² evenly across established turf before weed emergence (early spring or late summer for Wintergrass).
Water in with at least 6 mm irrigation within 7 days of application to activate the herbicide barrier.
Repeat after 3–4 months in high-pressure areas for extended protection.

Safe for use on Buffalo, Kikuyu, Couch, Zoysia, Seashore Paspalum, and Queensland Blue Couch lawns.

If you’re unsure when to apply or want to pair Onset 10GR with the right fertilisers or wetting agents, check The Lawn IQ Programs for a tailored seasonal plan that keeps weeds out and your lawn at its best.