How to kill onions in lawn?

1. Herbicides:

- Use a selective herbicide that targets onions without harming the surrounding grass. Follow the instructions on the product label and apply it according to the recommended dosage and timing.

2. Hand pulling:

- If the onion plants are small and few in number, you can hand-pull them. Make sure to remove the entire root to prevent regrowth.

3. Vinegar:

- Spray a mixture of equal parts white vinegar and water directly onto the onion plants. This method is effective for small onions and may need multiple applications.

4. Boiling water:

- Pour boiling water directly onto the onion plants. This method is effective but should be used with caution to avoid damaging the surrounding grass.

5. Mulching:

- Cover the onion plants with a thick layer of mulch, such as grass clippings or straw. Mulch will block the sunlight and prevent the onions from growing.

6. Salt:

- Sprinkle salt directly on the onion plants. Salt will draw water from the plants, causing them to wilt and eventually die.

7. Onion Weed Killer:

- Apply a specific onion weed killer, such as fluazifop or quizalofop. These herbicides are effective in controlling onion growth but may also damage certain types of lawn grasses.

Remember to take necessary precautions when using herbicides or chemicals to kill onions in your lawn. Always read and follow the instructions on product labels and use personal protective equipment if recommended. If the onion infestation is extensive or persistent, it might be best to consult a professional lawn care service for assistance.