There are no pre-emergent controls for wild onion, but there are herbicides that will work during the growing season. If you wish to go this route, check with a garden center for the proper material for your area and your grass variety. Mowing wild onions will weaken them but not get rid of them because they grow from tiny bulbs which will re-sprout. You can nip the problem in the bud by digging out the clumps carefully in early spring as they appear, making sure that all the baby bulbs on the sides come up as well. The diminutive onions thrive in heavy, wet soils, so aeration and holding back water may help. If you keep after them for a couple of seasons you will win the battle. We hope that you don’t shed too many tears over your problem!
There are no pre-emergent controls for wild onion, but there are herbicides that will work during the growing season. If you wish to go this route, check with a garden center for the proper material for your area and your grass variety. Mowing wild onions will weaken them but not get rid of them because they grow from tiny bulbs which will re-sprout. You can nip the problem in the bud by digging out the clumps carefully in early spring as they appear, making sure that all the baby bulbs on the sides come up as well. The diminutive onions thrive in heavy, wet soils, so aeration and holding back water may help. If you keep after them for a couple of seasons you will win the battle. We hope that you don’t shed too many tears over your problem!