What Is Wild Onion Grass and How Do You Control This Plant?

What Is Wild Onion Grass and How Do You Control This Plant?

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Eating Wild Plants

The edible plants we find on our grocery store shelves are all familiar to us. Every image of their origins involves neatly set rows in farmers' fields or spotlessly clean stacks in a plastic-smelling, air-contained atmosphere. By eating them, we get about as close to them as we can get, yet, somehow, we forget that the foods were once wild plants. Some were even considered weeds.

One such example is wild onion grass. It is hard to control and invasive in gardens. For that reason, many gardeners seek help getting rid of onion grass. So how do you get rid of it? And why? This page explores the option of controlling and growing onion grass to eat or getting rid of it once and for all.

What Is Onion Grass?

Onion grass is very similar to garlic, onion, and chive. They are all part of the bulbous family. It is unique to its cousins in that it is widely considered an invasive weed.

Common Grass Weeds

Beautifully groomed lawns have one common denominator-they are weed free. A weed is a general term for any plant that a grower finds undesirable. Maybe the plant is ugly, in the case of crabgrass; beautiful but inedible, like clover; or beautiful and edible but invasive, like most types of sunflower. In some cases, the title of weed is arbitrary. Mint is a wild and invasive weed to most gardeners. But in my backyard garden I grow mint, which I use to make tea. Onion grass is another such example of the gray area between plant and weed.

Parts of the Onion Grass Plant

Onion grass, as part of the bulbous family, has a few distinct features to plants in other families. For starters, it contains bulbs under the surface, just above the small root system, with which it reproduces. Its leaves are shaped like tubes. The leaves are also thin and long, giving it a grass-like appearance (see photo below for a picture of the bulbs and roots). The leaves also give it its wonderful aroma and flavor. It shares a similar flavor with its relatives. They can be used much like chives, although with less crunchiness.

Onion grass differs, however, in that it is invasive. If not properly maintained it will run wild and easily overtake a garden or lawn and steal valuable nutrients for other plants and grasses.

Wild Onion Grass Control

If growing and eating onion grass is not for you, there are ways to control and, hopefully, kill it for good.

How Do You Get Rid of Wild Onion Grass?

The first option for getting rid of wild onion grass is to pull it out like you would any other weed. But make sure to focus on getting the bulbs out. It's easy to just focus on the green part that shoots above ground but, as mentioned earlier, the bulb is responsible for propagating the plant. Leave the bulb and it will come right back. Digging a little deeper will be more work at first, but in the long run it will save a lot of future headaches.

Sprays and Killers

The leaves of onion grass present a unique problem. The thin tubular leaves make typical sprays and killers, which are designed for broader leaves, less effective. This means that larger amounts of spray and/or more applications may be needed. recommends Ortho Weed-B-Gone Max weed killer for small areas and a similar concentrate spray for large areas. Round-Up Ready-to-use weed and grass killer is another good option. Use these sprays before and after winter because onion grass is a perennial plant. The bulbs hang out underneath the surface throughout winter before growing in spring. (Links to these products can be found at the bottom of the page)

Conclusion: Wild onion grass is perfectly good to eat. It comes from the bulbous family and has a similar taste to its relatives, such as chives and onions. It is seldom eaten and is considered a weed because it is invasive. If you choose to get rid of it, you must get rid of the bulbs from which the plant grows. Sprays and weed killers work too, but certain ones must be used.

notice how the leaves grow from underground much like grass

© 2012 Ryan Buda

Joe on July 25, 2012:

You should ALWAYS include the botanically (bi-nomial ) /systemic name as that is the only definitive way of identifying the plant. Common names such as 'onion grass' do not uniquely and unambiguously I'd the plant as they vary from one locality to another, let alone across country / geographic regions.

Watch the video: Wild Onions, A Cherokee Foraging Tradition (August 2022).