There are several ways to kill weeds without harming grass. Here are some methods:

1. Selective herbicides: These are designed to kill specific types of weeds while leaving the surrounding grass unharmed. Look for a product that is labeled for the specific types of weeds in your lawn and follow the instructions carefully.

2. Hand-pulling: This is the most effective way to remove weeds without damaging your grass. It can be a tedious task, but the results are well worth the work. Start by getting some gardening or work gloves because some weeds can be prickly. Youll also need to have some type of weeding tool to assist you in completely pulling out the root of the weed.

3. Boiling water: Fill a kettle or pot with water and bring it to a boil on your stovetop. Carefully pour the boiling hot water directly onto the weeds you want to kill. Make sure you dont pour the water onto your grass so you dont damage it. Once the weed dies, itll decompose and your grass will grow over it.

4. Salt and vinegar: Salt and vinegar work as a non-selective herbicide, which means if it kills your weeds, it will also kill your grass. However, you can use them in a diluted form to avoid harming your grass. For example, you can mix together 1 cup of salt with 8 cups of hot water to make an effective solution. Add a drop of dish soap to help the solution stick to the weeds. Apply the mixture directly to the weeds but avoid surrounding grass.

5. Selective weed killers: There are several weed killers on the market that are specifically designed to kill weeds but not grass. For example, Mighty Mint Selective Weed Killer for Lawns is a safe, selective weed killer that doesnt kill the grass. It targets broadleaf weeds and is safe for use on most types of grass.

Its important to note that using a general-purpose weed killer will kill the grass as well as any weeds, and ruin your lawn in the process. Therefore, its important to choose a product that is specifically designed to kill weeds but not grass.