Spring wild onions in turf
Each spring, in my shaded front yard, I have an impressive crop of wild onions. As the spring fades so do they, but is there a way to reduce their numbers?
Cecil County Maryland
Mowing the lawn too short and inadequate fertilization of the lawn are conditions that favor the growth of the wild onions. To prevent mow at the proper height (3-4 inches) and practice proper fertilization. See our website https://extension.umd.edu/hgic/wild-garlic and our publication on Turfgrass Maintenance for more information http://extension.umd.edu/sites/default/files/_images/programs/hgic/Publications/HG112_Turfgrass_Main...
You can manually dig out the weeds, if there are not too many making sure to get the bulblets out of the ground. Or you can spot spray a post emergent herbicide on the weeds when actively growing. Look for an herbicide that lists the weeds on the label and follow all label directions. To aid in the herbicide being absorbed into foliage, step on the onion foliage and twist your foot in order to bruise the foliage of the onion, then spray it with the herbicide.
See the attached publication for more information http://www.mdturfcouncil.org/admin/uploadfiles/tt-49-broadleaf-weed-control.pdf