Fertilize your lawn properly, and you’ll be on your way to a healthy, dense stand of turf that maintains a deep green color and gives weeds a run for their money..If not, apply Scotts Turf Builder Lawn Food. In the South, if weeds tend to be a problem, feed your lawn with Scotts Turf Builder Bonus S Southern Weed Feed . If you don’t have a weed issue, use Scotts Turf Builder Southern Lawn Food..Each grhas its own growing season, therefore, each requires a different schedule for fertilizing. As a rule of thumb, it is best to apply fertilizers when your lawn is actively growing. If you fertilize with nitrogen while your lawn is dormant, you can encourage weed growth, and ultimately waste fertilizer..Your lawn fertilizing schedule will depend on what type of gryou have and the type of fertilizer you’re using. Tip Before you fertilize, check your local weather forecast. Plan to fertilize just before a day of light, steady rain..