We’ve been on the lookout for some medium-large planters to house the new blueberry bushes we got, but its been difficult finding good ones at a reasonable price. So we decided to build our own. Total cost ended up being around $25-$30 for a 18inch cube shaped planter. We could have used cheaper wood and reduced the price a bit, but we decided to use redwood for the weather and insect resistance.
Instead of using redwood planks, we used 5.5 inch redwood fence boards. Fence boards are cheaper than redwood planks and they also have a more rustic, unfinished look.
Cut from 5.5 inch wide redwood fence boards:
- 12×7.25 inches – for the planter sides (A)
- 3×18 inches – for the planter bottom (B)
Cut from 5.5 inch wide redwood fence boards, but split length-wise so one piece is 3 1/8 inches and the other is 2 3/8 inches.
- 4×17.75 inches – for the planter edges (D: 3 1/8, E: 2 3/8)
Cut from 1 3/8 square redwood lumber
- 4×17 inches – for the corner posts (F)
We also used 16 2 1/2 inches exterior wood screws and 12 1 1/4 inch exterior wood screws leftover from a previous project.
- Saw (we used a hand saw, but a power mitre saw would be much easier)
- Power drill
- Carpenters square
- Tape measure or ruler
- Clamps (we didn’t have any but it would have made the project a lot easier)
After cutting all of the required pieces, check the cut edges to make sure they are smooth and remove any sharp splinters.
Then start by constructing the first corner, take two sides (A) and line them up with corner post (F). All three pieces should sit on top of a base piece (B) and be flush with the edges.
DIY Redwood Planters – Step 1.
Then take the two edging pieces (D and E) and arrange them as shown below (an extra pair of hands might come in handy here). You can also first screw in the sides to the corner posts, then attach the edging, but we were trying to save some screws. Be sure to drill pilot holes before driving the screws to make sure the wood doesn’t split. Pay close attention to how the seams overlap each other. The seam between the two sides (A) is covered by the edging piece (D). The side pieces (A) and corner post (F) should sit on top of a base piece (F). The edge pieces (D and F) should sit on the ground.
DIY Redwood Planters – Step 2.
Next, either clamp the pieces of wood together or have a friend hold them while they are screwed together using 2 1/2 inch exterior wood screws. Make sure you attach the screws in to the center of the corner posts for a solid connection.
DIY Redwood Planters – Step 3.
After the first corner is done, continue building the corners around the planter.
DIY Redwood Planters – Step 4.
After all of the corners are completed, slide the remaining sides (A) down the grooves and screw in place.
DIY Redwood Planters – Step 5.
The final step is to attach the bottom boards (B). Lay out the boards so there is around a 1/2 inch gap between the three boards for drainage. Then screw in to place using a combination of the 1 1/4 inch screws along the edge and the 2 1/2 inch screws in to the corner posts (F).
DIY Redwood Planters – Step 6.
Now you are ready to plant! We planted blueberries so we could better control the soil since blueberries grow best in acid soil.
DIY Redwood Planters in the garden.