Without proper lawn care, broadleaf weeds grow easily among the desired grass in your lawn. Broadleaf weeds compete for the same things your grass needs to survive and thrive---sunlight, water, and nutrients. The advantage that broadleaf weeds have over grass is that their roots usually grow deeper than grass roots, which allows them easier access to water. They can also grow large, sprawling leaves, which can shade out valuable sunlight from the grass. The good news is that with the many products available today on the market, it is really easy to get rid of weeds in pastures and lawns.
Apply an herbicide that contains the active ingredient 2,4-D. Depending on the area you want to cover, either purchase a concentrate, mix with water and apply with a pump-up sprayer or buy a concentrate that comes in a bottle that can be attached to the end of your garden hose. Read all application directions before applying the herbicide.
Develop a consistent mowing pattern. Lawns and pastures should be mowed every five to seven days. This allows the grass to become lush and healthy because you will be removing no more than one-third of the grass blade at each mowing. Also, some weeds cannot tolerate repeated mowings, so they will decline and die.
Walk through your lawn or pasture and spot-treat weeds at least once a month during the growing season. Use an herbicide with the active ingredient 2,4-D. The difference between this and step 1 is that you will buy pre-mixed bottles of herbicide for this step. Spray each individual weed that you see.
Apply a pre-emergent herbicide in the spring. These herbicides are usually granular in nature and either come by themselves or as a component of lawn fertilizer. They work by preventing weed seeds from germinating, which can significantly lower your weed population. These are applied like lawn fertilizers with a broadcast spreader.