How to Stop Rock Garden Erosion

Rake the rocks into the center of the rock bed. Make sure they are out of the way of the edging.

Dig a 6-inch trench around the rock bed. This is where you are going to place the edging. Cut any roots you encounter with the edge of a shovel.

Place the edging into the trench so that the "V" is facing the bed rather than the lawn. Cut the edging with a utility knife and press both ends into the trough. If you need to connect multiple pieces of edging, set a connector piece between the pieces of edging so that half of the connector is attached to one piece of edging and the other half is connected to the other.

Press the edging into the soil so that only 1/3 of the edging is showing. This will put it deep enough into the soil so that you lawn mower doesn't hit it.

Step on the soil that is on the rock side of the edging. Depressing the soil will help settle the edging. Readjust the edging as needed.

Position a stake 3 inches from the edge of the edging so that it is at a 90 degree angle with the bottom of the edging. This will be parallel with the soil and you may need to move some of the soil to see the bottom of the edging. Hammer the stake all of the way into the edging. Repeat the process every 7 feet or at every connector.

Press soil into the rock side of the edging so that only 1/3 of the edging is exposed. Press the soil down with your feet.

Drop soil on the lawn side of the edging so that the grass will regrow in any gaps you made.

Water both sides of the edging to settle the soil.

Rake the rocks back in place.