October 29th, 2026Victorian landholders urged to act now before serrated tussock sets seed
The Victorian Serrated Tussock Working Party (VSTWP) is urging landholders across Victoria to take action against serrated tussock before the invasive weed enters its annual seeding period, warning that early intervention is critical to preventing further spread.
With serrated tussock typically flowering and setting seed during late spring and early summer, October and November provide an important opportunity for landholders to identify infestations, undertake control works and remove developing seed heads before they mature and disperse.
Serrated tussock (Nassella trichotoma) is one of Victoria’s most damaging agricultural weeds, reducing pasture productivity, threatening native biodiversity and creating significant long-term management costs for landholders.
VSTWP Chair Lance Jennison said the coming weeks represent a crucial window for controlling infestations before they contribute to the existing seed bank.
“Every serrated tussock plant that is allowed to set seed has the potential to create problems for years to come. A single mature plant can produce tens of thousands of seeds, which can be carried considerable distances by wind,” Mr Jennison said.
“Now is the time for landholders to inspect their paddocks, roadsides and property boundaries, identify serrated tussock plants and take action before those seed heads mature.”
The VSTWP is particularly encouraging landholders to prioritise the removal of seed heads from isolated plants and smaller infestations, where preventing seed production can make a significant difference to long-term control efforts.
Where seed heads have already developed, they should be carefully removed and securely bagged to prevent seed dispersal. Landholders should also consider appropriate herbicide treatments, manual removal and longer-term pasture management strategies.
“Removing seed heads before they release viable seed is an important preventative measure, particularly where immediate treatment of the entire infestation isn’t possible,” Mr Jennison said.
“However, removing seed heads alone won’t kill the plant. Landholders need to follow up with effective control measures to prevent regrowth and future seed production.”
The VSTWP also reminds landholders that serrated tussock can be difficult to identify among native grasses, particularly before its distinctive, purple-tinged flowering heads develop and mature into golden-coloured seed heads.
Maintaining competitive, healthy pastures and regularly monitoring previously treated areas are essential components of successful long-term management.
“Managing serrated tussock is a shared responsibility. When one property allows plants to set seed, neighbouring properties and surrounding landscapes can be affected,” Mr Jennison said.
“We encourage everyone to be proactive this spring. A little effort now can prevent much larger infestations and considerable expense in the future.”
