Wild onions

Asked March 13, 2013, 4:01 PM EDT

How do I get rid of wild onions, they come right through ground covers and mulch.

Polk County Oregon

1 Response

Hi:

Not an easy weed to manage, unfortunately. For the homeowner options are a bit limited. The ability to produce the bulbs makes it difficult to mow or mulch your way out of the problem.The following is from the PNW Weed Management Hanbook. The listed product, 2,4-D, is found in common products like Weedmaster, Weed B Gone and others, just look on the ingredient statement and check the label to see if Wild Garlic or onion is listed as being controlled by the product, and of course for the rate to use.

Garlic, wild (Allium vineale)

2,4-D LV ester Rate1 to 2 lb ae/ATime Early spring, preferably mid-April, before garlic is more than 8 inches tall. Re-spray annually to achieve effective control.Remarks 2,4-D LV ester is selective in cereals and grasses. It is very important to re-spray annually for several years to effectively reduce the garlic stand. This plant produces small dormant bulbs that germinate over several years.Caution Avoid drift to sensitive crops.Site of action Group 4: synthetic auxinChemical family Phenoxy acetic acid