How do I control onion weed?
Hardiness Zone: 7b
By Alan from NSW, Australia
Remove the leaf blades by snapping them off with your hands. Wear latex gloves when removing the leaves. Dispose of the leaves and let the soil around the onion grass dry up as much as possible.
Carefully apply weed killer to the weed before pulling it out. Only spray the weed; do not spray the surrounding grass. To properly eliminate the onion grass problem you must apply weed killer during growth and after you've removed the bulbs.
Pull the entire weed out of the dirt, including its bulb. Wear latex gloves removing the bulbs from the soil.
Spray a strong herbicide in the soil where the onion grass was. Look for a herbicide that contains imazaquin, metsulfuron methyl or glyphosate. Do not let the herbicide make contact with the rest of your lawn.
Continue using herbicide treatments until the onion grass has stopped growing. Spray the area well in late winter/early spring--when the onion grass starts to grow but the lawn is still dormant--and in late fall to prevent the weed from growing the next year.
The only way is a glyphosate spray, painted on with a 1inch brush or sprayed in a single stream [not misted as will kill all that it wets]. Best to buy it full strength, not watered down, like Zero is, or you will need to repeat a few times. Because its a waxy repellent type grass, we add a few drops of dish washing liquid to the spray so it doesn't just run off. Other wise invite a flock of cockatoos over, they love digging it out to eat.
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