Onion Grass Control: Identification First

"Onion Grass" Is Not a Standard Weed Name

References point to Australia. In the U.S., you likely have:

• Wild garlic/onion (Allium vineale) – hollow leaves, strong odor.
• Star-of-Bethlehem (Ornithogalum umbellatum) – white flowers, waxy leaves.
• Wild chives – clumping, edible.

Control Options

• Glyphosate (spot treat): Kills everything—shield desirable plants.
• 2,4-D + dicamba blends: Selective for broadleaves in cool-season grass.
• Metsulfuron (Manor, Blade): Effective on Allium species in warm-season turf.

Critical

Identify the species first. County Extension or a clear photo to a local nursery gets you the right product. Guessing wastes money and risks lawn damage.