Limestone supplies calcium and magnesium nutrients needed by grass plants and corrects soil acidity. It also makes phosphorous more available, speeds up rotting of dead plant material in the soil (thatch) and reduces leaching of potassium by rain water.
How often do I need to put Limestone on my Lawn?
A soil test should be performed at the initiation of a lawn treatment plan to correct soil pH. This test can also measure Phosphorus and Potassium levels in the lawn and give recommendations for their correction as well. Soil pH can change significantly enough over only a few years. If you haven’t had a soil test performed on your property in the past 3 years, you should consider adding this service. The test is fairly inexpensive and results are typically returned back to us from the lab at Penn State within a few weeks. At that time, we will make recommendations based on the laboratory’s findings which may include limestone, phosphorus, and/or potassium applications. These additional applications are typically applied to lawn areas in the late fall. The materials take several months to a year to work down into the soil.
Once you have corrected soil pH initially, adding a maintenance-rate limestone treatment on a yearly basis is also an excellent addition to any lawn care program. This should keep the soil closer to where it should be on the pH scale. However, it’s advisable to still check the pH every few years by having a soil test sent off for testing.