This modern steel and cedar planter box is a fantastic DIY project created by Johnny Brook from Crafted Workshop.
Materials and Tools Needed
- Cedar 1x4s
- Cedar 1x2s
- Pressure-treated Pine 2x6s
- Steel angle iron (2-inch)
- 1¼” Exterior rated screws
- 2” Exterior rated screws
- 2½” Exterior rated screws
- Waterproof wood glue
- Plastic sheet (2 mil)
- Steel mesh
- Brad nails
- Construction adhesive
Tools
- Miter saw
- Circular saw (optional)
- Drill
- Pocket hole jig
- Aviation snips
- Belt grinder or angle grinder
- Drill press (optional)
- Stapler
Step 1: Cut the Cedar Boards
The first step in this project is to break down the cedar boards into their final lengths. This build uses cedar 1x4s, 1x2s, and pressure-treated pine 2x6s. While you can use a circular saw, a miter saw with a stop block will make the job much faster.
Step 2: Assemble the Panels
Start by marking an inch and a half from the bottom edge of the bottom board to indicate where the gap for the two by sixes will be. Next, square up all the boards and lay out the 1×2 pieces, using one as a spacer to ensure proper spacing.
Add glue where the other 1×2 will attach and use eighth-inch spacers to set the distance between the boards. Attach the 1×2 to the 1×4 with 1-inch brad nails, ensuring all rough faces are directed towards the inside of the panels.
Step 3: Reinforce the Panels
Once each panel is built, reinforce them with inch and a quarter screws for added sturdiness. Since you are building two planter boxes, repeat this process for the short side panels.
Step 4: Build the Long Side Panels
The long side panels are built in the same way, but include an extra upright support in the center to prevent flexing under the weight of soil and plants.
Step 5: Assemble the Planter Boxes
Start assembling the panels into the planter boxes, ensuring that the top edge of the planter box rests on your workbench for alignment. Clamp the corners tightly to eliminate gaps, then secure them with 2-inch screws.
Step 6: Create the Bottom
The bottom consists of the 2×6 pieces. Measure and cut them to length, then drill three pocket holes at each end of each board. Attach the bottom pieces to the panels using pocket screws, ensuring there’s a small gap between each board for drainage.
Step 7: Add the Trim
Sand all corners flush before adding the trim. Cut the trim pieces at a 45-degree angle to ensure a snug fit. Attach the trim with glue and inch-and-a-half brad nails, ensuring the edges are flush with the panels.
Step 8: Sand the Planter Box
Give the outside of the planter box a good sanding with 80 grit sandpaper, focusing on the corners and trim for a smooth finish.
Step 9: Line the Planter Box
Line the bottom with galvanized steel mesh to prevent dirt from falling out. Cut the mesh to size and staple it in place. Then, line the planter box with 2 mil plastic, doubling it up for extra durability.
Step 10: Attach the Legs
Cut the steel angle iron to size and drill holes for screws to attach the legs to the planter box. Use construction adhesive and screws to secure the legs in place.
Step 11: Fill and Plant
With everything assembled, fill the planter boxes with soil and add your favorite plants. This planter box is not just functional; it’s a beautiful addition to your outdoor space!
And there you have it! A modern steel and cedar planter box that’s simple to build and adds a touch of elegance to your garden. For detailed plans go here: https://craftedworkshop.com/store/diy-modern-planter-box-plans.