Posted on

onion weed seed

Weed of roadsides and disturbed areas.

Biological Control:

Flower head:

Key Characters:

Flowering stem – Hollow, erect, rigid, smooth, hairless. May branch above half way to the top. 200-800 mm tall.

Does not host Root Lesion Nematodes (Pratylenchus neglectus or thornei) 63

Occurs from Exmouth to Eucla in WA.

Onion weed has slender, light green strap-like leaves that sprout in clumps and can grow to around knee height. Just like a snowdrop or a daffodil, flower stems appear from the middle of the leaves in spring and early summer producing clusters of pure white drooping flowers that open above the foliage. The flower stems themselves are characteristically three-cornered. The easiest way to confirm that you are looking at onion weed is to crush any part of the plant – it will smell of onions. The good news is that every part of this plant is edible and it can be treated a bit like a spring onion or baby leek.
Onion weed grows from a small parent bulb and spreads underground by producing additional tiny bulbils that grow into dense crowded clumps of foliage. It also spreads rapidly around the garden through seeds cast from pods that form on the three-cornered stems after flowering. Onion weed can form a dense carpet of foliage that suppresses the growth of other plants. It dies back, absorbing nutrients from foliage in autumn down into the bulbs, and then re-grows new foliage in the spring. It is a persistent weed and one that is hard to completely eradicate.
When foliage is pulled out, bulbs and bulbils in the soil below will re-grow. If onion weed is dug up to remove foliage and the parent bulb most often the smaller bulbils – that can be hard to see – get freely distributed through your soil to grow into even more plants.

Controlling onion weed without the use of chemicals takes time and patience. With concerted effort you can certainly make a difference and reduce the quantity present in your soil – however, its likely you’ll have to learn to live with a certain amount of onion weed once it finds its way into your garden.
Remove all foliage whenever you see it. This will weaken plants considerably over time and help to prevent re-growth. The aim is to be even more persistent than onion weed itself and to keep depriving it of its ability to nourish its bulbs hidden in the soil below. Cut foliage with garden shears if you have large clumps. You can even go over it with the lawn mower.
Onion weed can be dug up by hand and bulbs carefully removed from the soil. It is important to dispose of the bulbs in a way the stops them re-entering your garden or compost heap where they will simply re-grow as new plants. Eating them is a fairly sustainable way of disposal. The bulbs can be pickled just like pickling onions. Flowers make an attractive addition to salads and the leaves can be chopped and added to potato salads, soups and stocks or in dishes that require a mild oniony flavour. Whole young plants can be or used just like a spring onion in sandwiches and salads.

Managing Onion Weed

Onion weed seed

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.

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.

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 onion weedsCan You Eat Wild Onions?

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.

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.