If you have noticed a clump or more of a tall grassy type weed in your yard, you may be dealing with wild onion. Wild onion comes from a bulb, therefore, cannot be controlled with pre-emergents. There are two ways you can deal with reoccurring wild onions in your lawn. When the soil is damp, you can dig the bulbs up with a small trowel. If you choose to dig them up, you’ll need to ensure that you get all of them, or they’ll just come back next winter. The other way is to use an herbicide specifically for treating this type of weed. When choosing herbicides, make sure that you read and follow the label carefully.