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onion weed seed

Yates Zero Rapid 1-Hr Action kills weeds fast. See most weeds start to die in 1 hour.

Onion weed is a proclaimed noxious weed for most of NSW and WA, and for all of TAS, SA and VIC. Onion weed is a perennial with thin green strappy leaves growing from a mainly white bulb which gives off an onion smell when crushed. Flowers grow at the top of a long stalk and are mainly white. Seeds form in summer and autumn and are spread mostly by wind blowing the seeds into new areas. Onion weed also develops small bulblets attached to the parent bulb. These sprout after the main parent bulb has died from herbicide such as Yates Zero Glyphosate Weedspray or from breaking off when the weed is being pulled up. Therefore repeat applications onto the weed will probably be required. The Yates Zero Weeding brush is a safe way to apply Zero for spot weeding which will avoid contact with wanted plants in the garden.

Yates Zero Rapid 1-Hr Action Weedkiller

Get Tough on invasive hard-to-kill weeds, and woody weeds.

An effective and easy way to kill weeds and grasses in rockeries, garden beds, paths, driveways, along fencelines and lawn edges

Certified Handler/Experienced agrichemical user: Foliar spray with 3g metsulfuron-methyl per 10L and 20ml penetrant.

Method: Dig out.

Can form dense infestations, displacing native vegetation and suppressing seedling recruitment.


Although onion weed is not a legally declared pest plant, it may still be invasive in some situations. Consider lower-risk alternatives for your garden, such as native plants.

Perennial herb < 60 cm tall. Bulbs are white, < 2 cm in diameter and ovoid, with smaller bulblets produced from the base. Stems are three-angled. Leaves are linear, fleshy, alternate and have a prominent underside midrib. Stems and leaves give off a strong garlic smell when crushed. Flowers are white with green stripes down petal centres, tubular, pendulous and borne on stems in October-November. Seed capsules are round, < 7mm in diameter, green maturing to brown and contain black seeds.

Plant parts requiring disposal: Seeds and bulbs.

Riparian, forest and shrubland margins, open areas, disturbed sites, wasteland, roadsides.

Mowing will slow the progression of these weeds because both wild onion weeds need blades for photosynthesis to occur. And mowing before the plant flowers and sets seeds will also slow its spread, so if you prefer non-chemical controls, “mow, mow, mow” your weeds.

These weeds are strongly scented, perennial plants or weeds found in most parts of North America. They grow in sun or shade, emerge in fall, and grow throughout the winter. They flower in spring, spread seeds, and then go dormant until cool weather returns. Until they go dormant, wild onion weeds presence will be announced by the odor of onions when the lawn is mowed those first few times in late spring.

Type: Perennial grass weeds
Size: 8-12″ inches tall
Where it grows: It can be found in many gardens and lawns,
Appearance: Wild onion has round long leaves.
Control: Pre-emergent and a post-emergent. To manually remove it, dig the clump out of the ground with a spade or trowel. Throw the entire clump away. Then spray with an on-contact killer in the hole.
Notes: Wild garlic can also spread by producing bulblets. These bulblets become new plants, thickening the patch. Frequent mowing will slow the spread because the plants will not have sufficient time to flower and go to seed.

Can You Eat Wild Onions?

Yes, wild onion is a difficult-to-control weed. These weeds look very similar to the garden variety onion except the stems of this weed type are much thinner and do not grow as tall as the garden variety onion. They grow in bunches and are very distant looking visually as well as producing an onion sent in your lawn. The most effective method for controlling these weeds is to create a dense turf through proper fertilization and weed control that will create a dense turf and which won’t allow as many weeds to pop up. In addition, regular mowing, will make onion weeds less noticeable and less problematic. Wild onion weeds die back to underground bulbs during early summer, but bulbs will germinate during the fall and winter. Selective chemical control is difficult and normally ineffective, so co-existing with these weeds is often the best choice.

Wild onions is the untamed cousin of the garden variety onion we use for cooking, and just like those from the store, or those we grow in our home gardens, the “wild ones” are edible. However, use extreme caution about eating anything plucked from your lawn (same as with mushrooms) as there are potential hazards, especially if chemicals were applied to your lawn or flower bed.

While these weeds are members of the lily family. Wild onion has a flatter blade. They reproduce by flowers and seed.

Our fertilization and weed control will take care of your wild onion weed problem. Our herbicide will include a “spreader/sticker,” which helps the herbicide stick to the plant and aids in absorption for better wild onion weed control. We apply different spot treatments that also work for wild onion weeds with a post-emergent weed control while the wild onion weed is actively growing and not just dormant.