What Do You Use Lime on Your Grass For?

Soil pH

• Gardeners should test their soil every two to three years, according to Cornell University. Also, soil must be tested before gardeners plant their lawn. To test your soil, dig 10 holes, 4 inches each, in the yard. Collect 1/2 cup soil from the bottom of each hole and mix in a bucket. Pour 1/2 cup of soil into a container and sent to your nearest cooperative extension office to receive a soil analysis.

When to Lime

• Gardeners should lime their yards when the ground isn't frozen, according to Cornell University. Also, it is best to lime your soil at least three months prior to planting because it takes that long for lime to alter the pH range. Avoid liming your soil when the grass is stressed. Lime can worsen stress symptoms caused by heat, pests, drought or disease, according to Cornell University Extension. Never lime your lawn when the soil is dry.

How to Lime

• The amount of lime you use depends on your current pH range. Lawns that have a pH range of 4.9 and below should be given 200 lbs. of lime per 1,000 square feet. Break up up lime applications to 50 lbs. of lime per 1,000 square feet four times a year, advises Cornell. Lawns with a pH range from 5.0 to 5.5 should receive 50 lbs. of lime in the spring and fall. If your pH range is 5.6 to 6.0, spread 50 lbs. of lime per 1,000 square feet.

Other Considerations

• Using too much lime can burn lawns and make the soil too acidic. Avoid ever applying more than 50 lbs. of lime per 1,000 square feet. It is important to use the correct amount and distribute the lime evenly over the yard. However, you can apply more lime in areas in flowerbeds near acid-loving plants, according to West Virginia University. Furthermore, test your soil's pH in three months after liming to see if there has been a change.