If the pH is too high, your grass cannot properly absorb nutrients. Ideal pH should be between 6.5-7.0, slightly acidic. Generally, lime is added to raise the pH and sulfur is added to lower the pH, and adding compost can naturally correct your pH.

Is high alkaline water bad for grass?

Most lawns thrive at a pH range between 6 and 7, near neutral. Having too low (acidic) or too high (alkaline) levels in your soil can spoil your lawn.

How does pH affect grass growth?

Most lawns and turf grasses thrive at a pH range of between 6.0 and 7.0. PH has an effect on plant growth, and important nutrients for plants tend to be available in soil when the pH is at those levels. ... Highly acidic soil can also directly damage roots.