Lime is a soil amendment made up of limestone, which is a natural and high source of calcium.

Lime corrects acidic soils by increasing pH levels, restores damage, and returns the nutrients calcium and magnesium to the soil. Calcium and magnesium are important nutrients that strengthen turf against environmental stresses, heat, dry weather and foot traffic. 

When a lawn has patchy spots, is weedy and/or turning yellow, it can be a key sign that your soil could be too acidic or is calcium and magnesium deficient. Lime can also be applied to give your lawn a healthy boost and protect it from environmental stresses. A pH test is recommended and can be purchased form your local garden center or distributor. Check with your county cooperative extension service to see if they offer free testing!

Lime can be applied anytime but recommended application is late spring and/or fall. It can be a great alternative to nutrient applications in the summer and can assist with protecting your lawn against harsh elements like heat and drought. Lime can also be effectively applied in the fall since cooler temperatures and rain help work it into the soil. Lime also works great in preparation for new grass seed or if the lawn has patchy spots, is weedy and/or is turning yellow.

The most common lime products used on lawns are calcitic limestone (containing finely ground pure calcium carbonate) and dolomitic lime. Enhanced Lime products are also available which have added ingredients that increase the effects of lime and improve product benefits.