If you are looking to kill your weeds and fertilize your grass at the same time, you can use a product produced by Scotts Miracle-Gro Company. It is called Scotts Step 2 Weed Control Plus Fertilizer. This product will successfully get rid of dandelions and other types of weeds while thickening and strengthening your grass. You can apply it during the months of April, May, and June.
Wait for a day to apply the Scotts Step 2 Weed Control Plus Fertilizer when the temperatures are above 60 degrees Fahrenheit but below 90 degrees F. There should also not be any rain in the forecast for at least 24 hours.
Put on a pair of gloves, long shirt and a long pair of pants. This will protect your skin from becoming irritated by the herbicide/fertilizer.
Place a pair of goggles over your eyes and a mask over your nose and mouth. This will protect your face from coming in contact with the Scotts Step 2 Weed Control Plus Fertilizer.
Sprinkle the Scots Step 2 Weed Control Plus Fertilizer over your lawn, beginning at the back. Spread the granules from left to right so that you do not miss any spots. The package will cover 5,000 sq. ft. of lawn. If your lawn is only half that size, use half the package.