Weeds are a nuisance no matter where they grow, but typically easy to get rid of. When they are springing up through the cracks in your sidewalk, you can douse them with herbicide. If they are sprouting in the soil of a new flowerbed, you can attack them with a hoe. Once they start taking over your lawn, it becomes a bit more complicated. You must take special care to rid your lawn of weeds without harming your grass.
Pull the weeds by hand. While this takes a lot of work, it is the safest and most thorough method and will help thwart the weeds' regrowth. Use a kneeling pad and garden gloves to minimize your discomfort. Be sure to pull up weeds at their roots. If you break them off above ground they will only come back.
Identify the weed. This will help you find ways to prevent its growth, as certain weeds will flourish in an oversaturated area while others will take over if your lawn is receiving inadequate fertilizer. Dig up a few weeds and contact your local cooperative extension office or garden store to learn about the type of weed and how to get rid of it.
Water your lawn occasionally and thoroughly rather than giving it a light daily shower. Doing so will cause your grass's roots to grow deep and strong, essentially crowding out weeds. One inch of irrigation weekly is a good amount. Place a rain gauge or empty glass jar marked in inches in the yard so you can measure the amount of irrigation and rainfall your lawn receives.
Fertilize your lawn four or five times a year. This will help rid your lawn of weeds in much the same way proper watering will, as healthy, well-fed grass will crowd out and fight off weeds. Avoid fertilizing while your lawn is dormant, though, as you will be feeding weeds instead of the grass.
Mow your lawn regularly, but do not cut it too short. Mowing on a regular basis helps rid your lawn of weeds by cutting off sprouting or flowering weeds, which will go to seed and create even more weeds. Keep your lawn between two and four inches tall. Mowing it shorter actually weakens your lawn and allows grassy weeds to grow even faster.