Weed Watch – Gazania

Posted on 8 June, 2012 by Connecting Country

The following information was originally published by Geraldine Harris in the Castlemaine Naturalist newsletter, and has been kindly re-written by her for the Connecting Country website.

Some plants become environmental weeds when they escape from our gardens into the surrounding countryside and start competing with local native indigenous species. I want to look at how some of these infestations can be controlled and which native plants can be used in their place.

Our native plants cannot be expected to perform as vigorously as pest plants that have been selectively bred for survival over hundreds of years. However, getting rid of pest plants and replacing them with native species will help preserve the integrity of our local habitats, attracting and providing resources for more native birds and other animals.

Gazania linearis
Gazanias are the large daisy-type yellow flowers that are escaping from private gardens and appearing more and more abundantly along our local roadsides and in bushland throughout Victoria, South Australia, Western Australia and New South Wales.

These very showy plants originated in South Africa and are being promoted in many plant nurseries as a tough drought resistant species. Many hybrids have been developed in cultivation between Gazania linearis and a closely related environmental weed species Gazania rigens. These plants produce abundant wind-blown seeds that can be dispersed many kilometres from the source, producing ever-increasing patches of gazania that compete with locally indigenous species. Gazanias also have the ability to re-grow from their bare roots, which enables them to spread into our bushland by the dumping of garden waste containing the tuberous root systems of these plants. Native animals tend not to eat them as they are low in nutritional value. Continue Reading »