Lime can be applied at any time of year, although applications made in the fall or early winter are preferred. Lime moves downward through the soil very slowly. Using lime is the way to raise and correct the pH of an acidic soil. Soils with a pH between 5.5 and 7.0 are optimum for most turf grasses. A soil test should be taken to best determine how much lime should be applied. 50 - 100 lbs. or more of lime per 1,000 sq. ft. are usually applied annually to maintain healthy lawns. Lime is important to turf grass plants because it supplies the plant with essential nutrients, particularly calcium. It also helps the soil bacteria, which decompose organic material and break down the dead tissue in the thatch layer.