How to Set Flagstone in Grass

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Things You'll Need

  • Surveyor spike flags or spray paint

  • Flagstone

  • Knife

  • Shovel

  • Tarp

  • Sand

  • Rubber mallet


Before setting the flagstone, spray the sand with water. This settles the sand and allows you to set the stone at the correct depth.


Grass won't grow well between crowded stones. Not only do the roots struggle, but the summer sun heats up the flagstones, and, in turn, the flagstones heat up the surrounding soil. This dehydrates the grass roots. Keep stones at least 3 inches apart.

Stepping stones protect your lawn and add structure.

When active feet beat a compacted pathway through your struggling lawn, it's best to bow to the inevitable. Instead of renting aerators, installing awkward fencing or otherwise trying to resurrect the grass in these trails, set flagstone in the grass. The stepping stones add whimsical character to your yard and gently guide visitors through your garden. Installing flagstone in your lawn is relatively simple, but incorrect installations catch unwary feet or lawnmowers. Set the stones the right way and enjoy the carefree pathway for years.


Step 1

Choose the course of your pathway. The pathway may be obvious, where pedestrians have trampled the grass, or you may choose a winding course toward a hidden nook. If a path is in a high-traffic area, don't vary far from the route; people tend to take the most direct route and will leave a winding pathway.

Step 2

Walk the course with a normal gait. With each step, note the point where the center of your foot lands. Place a surveyor's flag, spot of spray paint or other marker at each point.

Step 3

Remove the surveyor's flag as you place each flagstone. Center the flagstone on the marked point. Use the stone as a template and cut through the sod.


Step 4

Move the stone aside and dig up the sod. Dig the site to the depth of the flagstone, then remove an additional inch of soil.

Step 5

Add 1 inch of sand to the bottom of the hole. Set the stone back in the hole, adding or removing sand until the surface of the flagstone is at ground level. Tamp the flagstone firmly with the rubber mallet. Backfill any gaps between the flagstone and the surrounding lawn with soil.


references & resources

Kimberly Richardson

Kimberly Richardson has been writing since 1995. She has written successful grants for local schools as well as articles for various websites, specializing in garden-related topics. Richardson holds a Bachelor of Arts in English and is enrolled in her local Master Gardener program.