When Do You Use Lime on a Lawn?


Quick Answer

Use lime on a lawn if a soil test indicates that the soil is below the optimum pH level of 6.0 or 7.0. Soil that has a pH level below 7.0 is acidic, and soil that has a pH level below 6.0 diminishes plant health.

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Full Answer

Soil can be naturally acidic, but acidity is also caused by natural leaching that occurs over time, the use of some nitrogen-based fertilizers, excessive rainfall, the irrigation of soil and acidic water sources. When the pH level of soil falls below 6.0, the nutrients that plants need to thrive and grow become locked in the soil. This means that plants cannot access the nutrients from the soil, which causes a loss of color in plants and a reduction in their vigor. Less vigorous plants cannot recover from the stresses of heat and drought easily.

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