Scalping a lawn refers to mowing it very short, typically down to a height of 1-2 inches. While this can be beneficial in some cases, such as removing thatch buildup, it can also be damaging to the lawn if done improperly.

Here are the steps to safely scalp your lawn:

1. Choose the right time: The best time to scalp your lawn is in early spring, when the grass is just starting to grow. This will allow it to recover quickly.
2. Mow the lawn: Set your lawn mower to its lowest setting and mow the entire lawn. Be sure to remove any clippings or debris that are left behind.
3. Water the lawn: After scalping the lawn, give it a good watering to help it recover.
4. Fertilize the lawn: Once the grass starts to grow back, give it a boost with a fertilizer that is high in nitrogen.
5. Avoid repeat scalping: Scalping the lawn too often can damage the grass and make it more vulnerable to disease and pests. It’s best to only scalp the lawn once or twice a year.

Remember that while scalping can be beneficial in some cases, it’s not always necessary or beneficial for your lawn. Be sure to consider the specific needs of your lawn and consult with a professional if you’re unsure whether or not to scalp it.