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Weeds and problem plants

How do I identify a weed?

When a plant invades an area where they do not naturally occur they are known as a weed. When a weed thrives in a location and becomes a problem to control or eradicate, they become known as a 'pest plant' or 'invasive weed'.

Australian native plants can be defined as an 'environmental weed' when they spread outside the area where they naturally occur, outcompeting the local species for light, water and nutrients. In Bayside, Coast Tea Tree and Coastal Wattle are two examples of Australian native species that have spread outside of their natural known location and are outcompeting local species in our bushland reserves.

The following are garden plants that have become pest plants in Bayside. Please avoid planting them or if they are in your garden consider removing and replacing them with a less invasive species.

Top 10 problem weeds in Bayside

Madiera vine

Madeira Vine

(Anredera cordifolia)
Can grow 10m in one growing season.

Mirror Bush

Mirror Bush

(Coprosma repens)
Shiny, green leaves, popular for making 'Skippy' whistles.

Lily of the Valley

Pampas Lily of the Valley

(Salpichroa origanifolia)
A scrambling herb often spread from dumped garden waste.

Sweet Pittosporum

Sweet Pittosporum

(Pittosporum undulatum)
Fleshy seed often spread by birds and animals.

Wandering Tradescantia

Wandering Tradescantia

(Tradescantia fluminensis)
An evergreen creeper that forms a smothering mat.



(Agapanthus praecox subsp. praecox)
Spread by seed and dumped garden waste.

Black Nightshade

Black Nightshade

(Solanum nigrum)
Distinctive green to black berries.

invasive weed species in Bayside - Bridal Creeper (common name)

Bridal Creeper

(Asparagus asparagoides)
Highly invasive weed of national significance.

invasive weed in Bayside - Cape Ivy (common name)

Small-leaved Cape Ivy

(Delairea odorata)
Seeds readily dispersed by wind.



(Gazania rigens)
Spread by wind, water and dumped garden waste.

Useful links

For more information on weeds and invasive weeds in Victoria see the Agriculture Victoria website.

If the weed you are dealing with is not in our list, try using the Victorian weed finding tool.