What is onion weed?(Asphodelus fistulosus)
- Onion weed is a pasture weed.
- Onion weed is a declared weed in Tasmania under the Tasmanian Weed Management Act 1999. The importation, sale and distribution of onion weed are prohibited in Tasmania.
How to identify onion weed
weed is an erect, clump-forming herb that grows to 75 cm high. The
roots are fibrous, thick and yellow. The stems are rigid and hollow,
while the leaves all emerge from the base of the plant and are almost
cylindrical in cross section. The white or pink flowers are arranged
alternately along the flowering stems which are longer than the leaves.
The fruit is a globular, wrinkled capsule.
- Seeds germinate at
all times but mainly in late summer and autumn. After flowering and
fruiting in spring and summer the flowering stems die back but most
leaves remain alive through summer. New leaves and stems are produced
from the base of the plant in the autumn.
- For help in identifying onion weed, search the Dennis Morris Weeds and Endemic Flora database
for onion weed illustrations. If you are still in doubt about the weed
you are dealing with, contact your Regional Weed Management Officer on
1300 368 550 for help.
Image top: Onion weed flowering
Image above: Close-up of onion weed flower
Onion weed in Tasmania
- Onion weed occurs as an occasional weed on King Island, Flinders Island and around Hobart (see map).
weed can invade disturbed land such as roadsides, degraded pastures,
neglected areas and sandy coastal environments. Onion weed infestations
can reach high densities. The weed is unpalatable and can significantly
reduce pasture carrying capacity.
What is the legal status of onion weed in your area?Detailed management and control guidelines for onion weed can be found in the Onion Weed Control Guide. Refer also to Herbicides for Onion Weed Control. For further information see DPIPWE's Weed Links and Resources
Onion Weed Control Guide
Herbicides for Onion Weed
Statutory Management Plan for Onion Weed
Weed Links and Resources
Other useful links
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