The ultimate goal is to make sure the paver edging bricks are level with one another. The brick edging should be 1/2 inch above the garden beds to ensure the mulch, rocks or dirt don’t spill over into the grass. Play sand can help facilitate level bricks especially if the ground is rocky and uneven. However, in most cases, just laying pavers on the dirt will suffice. Foregoing sand will also save you time and money.