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Completed planter box

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Wood Required

 

Quantity Size
2 2” x 4” x 8’
1 2” x 4” x 4’
4 1” x 6” x 8’
1 2” x 2” x 8’
1 5/4” x 6” x 8’

 

I made my planter box out of cedar, which smells great and weathers very well. I kept mine natural to easily blend with any outdoor patio style. You could also paint or stain it to match your own personal style.

All pieces cut to length

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Wood Cuts


Start with your 2” x 4” x 8’ lengths. Cut 1/8” off one end so you have a clean, straight edge. You are now ready to set up a stop block and cut all of your pieces. (A stop block acts as your guide, guaranteeing every piece will be cut exactly the same.)


Cuts Quantity
2” x 4” x 8’ 8 @ 16” (l)
4 @ 12” (l) x 1-5/8” (w)
4 @ 13-1/4” (l) x 1-5/8” (w)
1” x 6” x 8’ 12 @ 14" (l)
3 @ 14-1/2" (l)
2 @ 15 7/8” (l) x 1-1/4" (w)
2@ 13 3/8” (l) x 1-1/4" (w)
2” x 2” x 8’ 2 @ 15 7/8" (l) with 45° ends
2 @ 14-3/4” (l) with 45° ends
5/4” x 6” x 8’ 2 @ 21-1/4” (l) x 4" (w) with 45° ends
2 @ 22-5/8” (l) x 4” (w) with 45° ends
Rip cutting the legs at 45°

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Planter Legs


After the basic cuts are done, it’s time to make the legs. I recommend using a table saw for this. Cut your 16” (l) pieces of your 2” x 4" at 3-1/2” (w) on a 45° angle.

Image left: Applying glue to leg miter joint. Image right: Clamping leg miter joint.

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Leg Clamp


Glue and clamp the 45° angle pieces together and secure with brad nails. (You must use exterior glue.) Leave it clamped for 24 hours.

Top left: Laying parts out before assembly. Top right: Legs and side supports dry assembled. Bottom left: Setting out spacing for side boards. Bottom right: Side boards in place.

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Pre-Assembly


Practice makes perfect! I always like to lay out everything and pre-assemble to make sure it all works together before it’s permanently assembled.


Marking position of lower side support

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Assembly


Measure 14" down on all four legs to mark the leg supports.

Image left: Toenail at approximately 45°. Image right: Securing bottom side support with treated-wood screw.

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Clamp your two 13-1/4" x 1-5/8" pieces to the top of the legs and at the 14" mark. On the top and bottom rail, toenail with a 3" treated-wood screw so it’s not visible.


Image left: Placing boards inside the frame. Image middle: Pinning boards in place. Image right: Securing boards in the corner

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Face Panels


After completing the frame, set three 14" lengths inside the frame. Place two 14” boards vertically (as shown below) for a tight fit before screwing. Make sure the boards are flush on top before pinning and nailing to the frame. Repeat this process for the other side.


Image left: Finished sides ready for assembly. Image right: Securing inside supports.

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Add the 15-7/8" lengths with the 45° edges to the bottom of the 14" lengths.


Image left: Clamping ready to attach side supports. Image middle: Drilling hole in side supports. Image right: Drilling hole in side supports.

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With the two side gables complete, you can now clamp and attach the 12” (l) x 1 5/8” pieces. Repeat screwing and secure as before.


Image left: Securing the boards to the frame. Image middle: Using 3” screws to secure inside supports. Image right: Completed inside supports.

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Use two screws (top and bottom) per board and four screws per side, which secures the boards to the frame.


Secure two 14-3/4" pieces with 45° ends to the frame using 3” screws as shown.


Image left: Bottom dry fitted. Image middle: Drilling drainage holes in bottom panel. Image right: Bottom installed.

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Take your three 14-1/2" (l) pieces and drill nine holes for drainage. Secure the boards to the base of the unit.


Image left: Installing the bed liner. Image middle: Liner trimmed flush to top. Image right: Adjusting and dry fitting the top pieces.

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Mold bed liner to the inside frame of the box and secure it with two 15-7/8” x 1-1/4" (w) and two 13-3/8” x 1-1/4" (w) pieces. Once secured, cut off excess wrap.


Pre-assemble the top trim pieces and tweak them as necessary so you get a perfect fit before securing.


Image left: Positioning end piece ready for glue. Image middle: Clamping miters in place. Image right: Securing miters with pins.

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Once your top pieces are ready, they need to be glued, clamped and pinned together before securing to the top.

Image left: Pinning the top in place. Image right: Clamping and pinning the top in place.

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After securing all 45° together, secure the top frame to the box by pinning.


Top left: Mixing glue and sawdust. Top right: Glue and sawdust paste. Bottom left: Filling the nail holes. Bottom right: Final sanding of the planter.

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I mix cedar sawdust with exterior glue to make a paste used to fill the pin holes. After the glue has dried, sand all edges and surfaces smooth using an orbital sander.


Completed planter box

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You are done. Start planting!

Text and photos by Barry Maruk

Barry Maruk is a carpenter with a creative passion for design and photography.