It doesn't take much to destroy a lawn - just one foolish decision. Definitely needs watering now!
Still, at least we know that the roots will have gone down as deep as possible. And if it weren't for my vanity (I like to have a green lawn), there is a case for not watering, especially where there is evidence that some grass is surviving. Although this patchiness will look unsightly in the short term, the good grass often gradually spreads out over the weaker grasses, thus making a more drought-resistant lawn.
However, there is a risk. Utility lawns are often not able to do this. And they tend to be made up of less drought-resistant grasses (perennial ryegrass). The best way to deal with this type of lawn is to cut it to 2.5 cm (one inch) to produce a thick blanket of turf to reduce water loss. Then water at the first sign of trouble.
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