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How to make an octagon wood planter

Updated February 21, 2017

Wooden planters are an attractive option to use in your outdoor space for planting flowers and vegetables. The possibilities for wood planters when you make your own are endless. The size, shape and overall style of the planter can be adapted to suit your individual needs. One option is to make an octagon-shaped planter. This type of planter is ideal for a large yard planter without a bottom. You can use an octagonal planter as a focal point within the overall landscape of your outdoor space.

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  1. Cut a 67-1/2-degree angle on each end of the eight cedar boards using a mitre box and hand saw. The angles should be on one 30 cm by 61 cm (12 inches by 24 inches) edge of each board. One 30 cm by 61 cm (12 inches by 24 inches) edge of each board will measure 61 cm (24 inches) long. The opposite edge with the mitred angles will be shorter.

  2. Place the eight boards together with the mitred angles facing in to create an octagon shape. The 30 cm by 61 cm (12 inches by 24 inches) sides should be flat against the work surface. The angles will fit together to create the eight 135-degree angles that make up the inside angles of an octagon.

  3. Drive four evenly spaced stainless steel screws through the outside of one board into the end of the adjoining board at each of the eight joints around the planter, using a screw gun. This will hold the boards securely together to create the sides of the planter.

  4. Place the planter in the desired location in the outdoor space. The planter can now be filled with soil and plants.

  5. Tip

    Adjust the dimensions of the planter to suit your space requirements. Cedar can be left natural because it is naturally rot-resistant; however, you may wish to paint it to match the exterior trim on your home.


    Wear eye protection when working with wood.

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Things You'll Need

  • 8 cedar boards, 2.5 cm (1 inch) by 30 cm (12 inches), 61 cm (24 inches) long
  • Mitre box
  • Hand saw
  • 1 box flush trim stainless steel wood screws
  • Screw gun

About the Author

Jonah Morrissey

Jonah Morrissey has been writing for print and online publications since 2000. He began his career as a staff reporter/photographer for a weekly newspaper in upstate New York. Morrissey specializes in topics related to home-and-garden projects, green living and small business. He graduated from Saint Michael's College, earning a B.A. in political science with a minor in journalism and mass communications.

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