When lawns are weedy, patchy in spots or turn yellow, it may be a sign that the pH balance of your yard is out of whack. One of the primary methods of correcting the problem is to add lime to your lawn to restore depleted nutrients and repair the damage. Liming a neglected lawn can eventually return your grass to a lush green oasis, although the positive effects may not happen overnight.
In addition to correcting soil acidity, lime adds calcium and magnesium to soil. Such nutrients are important to preserve a lawn’s color and vigor and protect from damage caused by heat, drought or traffic stress. Calcium in particular helps to regulate other beneficial soil nutrients such as zinc, copper and phosphorus.
Lime can be applied throughout the year but tends to be most effective in the fall since rain and cold temperatures help work lime into the soil. Lime shouldn’t be applied to grass and yards that are wilted or covered in frost. Since it can take two years for lime to move 2 inches into your soil, avoid over liming by applying lime only every three to five years.