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How To Build a Stone Planter

Stack cast-concrete blocks in a tiered pattern to give your curb appeal a hefty boost

If guests tend to fly right by your drive, it might be time to add some oomph to your entrance. Install a stepped stone planter along the driveway, and suddenly you've got an unmistakable guidepost. Not to mention a natural spot to add a pop of color with plantings or the welcoming light of a lamppost. With a wide variety of block sizes and styles available, you can tailor the look to that of your home, from rustic to stately. Read on to see how senior technical editor Mark Powers put together this yard monument, which is sure to force passers-by—friends and strangers alike—to sit up and take notice.


Steps // How To Build a Stone Planter
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How To Build a Stone Planter Overview

 
Step One // How To Build a Stone Planter

How To Build a Stone Planter Overview

overview diagram showing parts to build a stone planter
Illustration by Gregory Nemec

Day-to-day timeline

Friday: Outline the planter
Saturday: Excavate and level the base
Sunday: Build the walls and fill the planters

 
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Know Your Blocks

 
Step Two // How To Build a Stone Planter

Know Your Blocks

person fitting blocks to build a stone planter
Photo by Kolin Smith

Using blocks of various lengths allows for a natural-looking, randomized pattern. With only one textured face to work with, you'll need to cleave certain blocks to get a second face that can be exposed—at corners or anywhere perpendicular walls meet. To do so, set a wide mason's chisel on the score line and strike it with a maul to split the block. Clean off any jagged chunks with the claw of your brick hammer. Our blocks have tabs that can be knocked off to create the necessary wedge shape for convex walls.

 
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Lay Out the Planter

 
Step Three // How To Build a Stone Planter

Lay Out the Planter

person using stones to make a rough outline to build a stone planter
Photo by Kolin Smith

Cleave an end from four blocks and position them at the corners of your rough outline. Place blocks of varying sizes between them, keeping the sides parallel. Divide the interior area with two walls that create equal-size planters; every other course will overlap the main walls, so just make sure you won't be left with gaps between blocks. If so, you'll need to adjust your planter's width. Once the layout is complete, mark the outline with a spade.

 
4 ×

Dig the Base

 
Step Four // How To Build a Stone Planter

Dig the Base

dig the base to build a stone planter
Photo by Kolin Smith

Excavate the area. Starting at the low point of any slope, use a spade to excavate past the loamy topsoil—6 inches or so, depending on your locale.

 
5 ×

Set Level Lines

 
Step Five // How To Build a Stone Planter

Set Level Lines

set level lines to build a stone planter
Photo by Kolin Smith

Once the area is roughly excavated, set up a grid of level lines so that you can check your depth. Drive stakes near each corner and every 2 feet along the sides. Beginning at the uphill end, stretch the line between two stakes about 4 inches off the ground and level it using a line level. Instead of tying the line in place, notch each stake so that you can easily unhook it while leveling the base. Work your way around the perimeter line, leveling as you go, then add level lines stretching side to side to create the grid. Measure from the level lines to the base of the excavated area. Dig or fill as necessary until the entire base is level and equidistant from the lines.

 
6 ×

Add the Paver Base

 
Step Six // How To Build a Stone Planter

Add the Paver Base

add the paver base to build a stone planter
Photo by Kolin Smith

To create a stable, well-draining base for the structure, lay 3 inches of paver base (¾-inch crushed stone and dust) into the excavated area.

 
7 ×

Tamp and Level the Base

 
Step Seven // How To Build a Stone Planter

Tamp and Level the Base

tamp and level the base to build a stone planter
Photo by Kolin Smith

Using a tamper, compact the base. Check the distance from the base to the mason lines frequently to keep the bed level. Add layers of paver base and tamp each one until your depth is equal to half that of one block, plus 1 inch, at the ground level's lowest point.

 
8 ×

Lay the Leveling Sand

 
Step Eight // How To Build a Stone Planter

Lay the Leveling Sand

rake used to lay the leveling sand to build a stone planter
Photo by Kolin Smith

To simplify fine-tuning the height of the blocks, add a 1-inch layer of leveling sand. Distribute it evenly with a steel rake. The bed should end up half the depth of one block at the ground level's lowest point.

 
9 ×

Lay the First Course

 
Step Nine // How To Build a Stone Planter

Lay the First Course

lay the first course to build a stone planter
Photo by Kolin Smith

Place the first block on the foundation at the highest point of ground level. Use a rubber mallet to set the block in the sand. Use a level to check it side to side, front to back, and corner to corner. Hold the next block beside the first and drop it in place to avoid dragging the sand between blocks. Level and set the block, and place a level across both blocks to check them. Run your hand across the joint and use the level as a straightedge to make sure the tops of the blocks are flush. Set the remaining blocks in the same way, taking care to orient the textured faces outward along the perimeter. For the interior walls, the textured faces should be oriented toward the short end of the planter.

 
10 ×

Stack the Courses

 
Step Ten // How To Build a Stone Planter

Stack the Courses

stack the courses to build a stone planter
Photo by Kolin Smith

To create a dry-stacked look and give the structure strength, stagger the joints on each course. On every other course, lay beads of masonry construction adhesive with a caulk gun, and "tie in" the interior walls to the perimeter by overlapping their end blocks with the main walls. Keep building up until each tier is three courses from completion, including the cap layer.

 
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Fill the Planters

 
Step Eleven // How To Build a Stone Planter

Fill the Planters

fill the planters to build a stone planter
Photo by Kolin Smith

To keep the planters from holding water—and freezing and cracking—fill each one almost to the top with drainage stone. This also strengthens the structure.

 
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Prep the Planters

 
Step Twelve // How To Build a Stone Planter

Prep the Planters

prep the planters when building a stone planter
Photo by Kolin Smith

To contain the soil, lay landscaping fabric over each planter, as shown. Use scissors to trim it just shy of the face of the walls; it will be sandwiched beneath the next course. If you build around a lamppost, like we did, snip a hole in the fabric big enough to fit over the lamp.

 
13 ×

Lay the Final Courses

 
Step Thirteen // How To Build a Stone Planter

Lay the Final Courses

lay the final courses to build a stone planter
Photo by Kolin Smith

Layer the final two courses on top of the landscaping fabric, then add the cap blocks, finish-side up. Scribe and cut them to fit as needed. (For custom cuts, create your own score line by chiseling a V-shaped channel all the way around the block.) Top off the planters with potting soil, and plant your favorite blooms.

 
 
 

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