Water hyacinth is a State prohibited weed
State prohibited weeds are the highest category of declared noxious weeds in Victoria. By definition they are either not yet in Victoria, or are here in small numbers, where their eradication is still possible.
All sightings should be reported to Agriculture Victoria immediately by calling 136 186 or emailing email@example.com.
Why is it important to report water hyacinth sightings to Agriculture Victoria?
Water hyacinth is one of the world's worst aquatic weeds. It infests rivers, dams, lakes and irrigation channels on every continent except Antarctica. It devastates aquatic environments and costs billions of dollars every year in control costs and economic losses.
Water hyacinth is native to the Amazon basin in South America and was brought to Australia in the 1890s as an ornamental plant.
How to identify water hyacinth
Water hyacinth is a floating water plant that can spread by daughter plants or seed. Water hyacinth plants have characteristic swollen stems with air filled tissue for buoyancy and large attractive mauve coloured flowers.
Bulbous stems contain air pockets, which help the plant to float. Stems can also be long and thin when the plants are crowded.
Leaves are bright to dark green, smooth and glossy.
Water hyacinth flowers are mauve in colour, with a darker purple patch and yellow spot on the upper petal. A number of flowers will form on a single stalk in Summer.
Water hyacinth has dark purple feathery roots.
Daughter plants grow from creeping stems that form roots at the nodes.
What should you do if you find water hyacinth?
If you think you may have seen water hyacinth, please contact Agriculture Victoria on 136 186 or send an email to firstname.lastname@example.org.
Please do not attempt to treat or dispose of this weed yourself. Agriculture Victoria will treat, remove and dispose of water hyacinth safely, at no cost to the land owner.
Water hyacinth grows best in warm, nutrient rich, slow moving waterways but can also be found growing in soil on the waterway bank.
In Victoria, Agriculture Victoria has been trying to raise awareness about water hyacinth and encouraging people to report and/or surrender any water hyacinth plants that they may have.
Resources have been developed to provide important information about water hyacinth in multiple languages to assist culturally and linguistically diverse people.