Many lawns in the Northeast grown in native soils are naturally acidic. If you have never limed your lawn there is a good chance your soil is acidic. Lime helps to raise the soil pH level in acidic soils. Soil pH is a measure of how acidic or alkaline your soil is. A pH of 7 is neutral, acidic soil registers below 7, and alkaline soil above 7. Your lawn can tolerate a fairly wide pH range of 5.5 to 7.5, with 6.5 being the ideal pH for growing grass. When your pH is in the ideal range other nutrients in your soil and in the lawn food you spread are more available to your grass plants. When the pH is outside of this ideal range, some of the nutrients get locked up by the soil and your grass can suffer.
It is always a good idea to do a soil test first before spreading lime on your lawn. If you live in any the northeast, you could spread up to 50 pounds of lime per 1,000 sq. ft. That’s 250 lbs. of lime on a 5,000 sq. ft. lawn. To spread this much lime, you may find you will need to go over your lawn several times with the spreader set at one of the higher settings. You will also find that granulated lime is easier to spread than pulverized or powdered lime. There is also fast acting lime available now that works faster using less material saving you time.
Lime can be applied anytime the soil is not frozen. Fall is a great time to spread lime since the upcoming alternating freezing and thawing of your soil can help to transport lime from the soil surface down to lower parts of the soil.