Oilseed Rape Or Canola

Oilseed Rape (or Canola).

Common name

Oilseed Rape Or Canola

Scientific Name

Brassica napus

Type of plant


About this weed

This widespread agricultural crop was photographed at Herdsman Lake growing in damp soil conditions. It was originally introduced as an agricultural crop and the bright yellow flowers can be seen across the Wheatbelt of Western Australia in spring. It may have originated as a hybrid of B. oleracea and B. rapa.


Canola is an annual or biennial herb growing to 1.5 m in height. The leaves are blue-green and those at the base may be bristly. It is common to see plants growing along country road verges where it may have been spilt from trucks.

Impact on Bushland

Unfortunately this agricultural crop has escaped the paddocks and can now be seen in bushlands and wetlands in various parts of the South-West.


Mainly growing on roadsides in the Wheatbelt but has been seen as far away as the Pilbara.

Priority for removal

Low: but may cause disruption to ecological processes or loss of biodiversity.

Management (hand)

Not available.

Management (herbicide)

Not available.

Flowering month/s

August, September

Flower colour/s


Information source


Additional information


Hussey, B.M.J., Keighery, G.J., Dodd, J., Lloyd, S.G. and Cousens, R.D. (2007) Western weeds. A guide to the weeds of Western Australia, Second Edition, The Weeds Society of Western Australia, Victoria Park, Western Australia.

Oilseed Rape Or Canola images


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2 Delhi Street West Perth WA 6005

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