Depending on the amount of foot traffic anticipated on and off the grass, we recommend spiking patio edges every 4 - 6 inches with a spiral galvanized spike.
Use the tip of the spike to pull the blades back exposing the backing beneath. Use your thumb and forefinger to keep the blades spread apart while you tap the spike down. It should rest flat against the backing with no blades trapped down by the spike.
You want the spike to sit a quarter to half inch away from the edge of the turf. Any closer may cause the edge to curl down creating a void, and spiking further away can cause the edge to lift up. Make sure the heads of your spikes are sitting flat to the backing, but do not pound them down any further as you will leave indentations in your base that will be visible later. The heads of your spikes will all be covered with infill and will no longer be seen or felt when you are finished with your installation.