How to Make a Window Box Planter Support Bracket

Written by mariah elaine
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How to Make a Window Box Planter Support Bracket
A large window box requires sturdy support. (WINDOW BOX image by brelsbil from

A window box planter overflowing with lush plantings adds a stunning accent to the outside of your home. Placed beneath a kitchen window, it provides an attractive view during chores and a bit of privacy from peering eyes. Though you can mount a planter directly to the side of your house, mounting brackets beneath the window box provides better support and allows you to easily remove it if needed. Wooden brackets are a popular support option, and with basic woodworking skills and a little effort, you can make your own brackets with an added decorative touch.

Skill level:

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Things you need

  • Measuring tape
  • Pencil
  • Poster board
  • Scissors
  • 1-inch-thick wood
  • Wood clamps
  • Ruler
  • Scroll saw or jigsaw
  • 80-grit and 120-grit sandpaper

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  1. 1

    Measure the width of the bottom of your planter, using the measuring tape. Write down the dimension.

  2. 2

    Copy or sketch a template design for your bracket. Ensure that your design has a 90-degree angle and that the length of the top is at least equal to the measurement obtained in step 1. Enlarge the design on a copier if the original is not large enough.

  3. 3

    Trace the outline of the template onto the poster board and cut it out with the scissors.

  4. 4

    Place the poster-board template on the wood, aligning the 90-degree angle with the corner of one end. Hold the template firmly in place and trace the outline onto the wood.

  5. 5

    Measure and mark about 2 inches longer than the template, using the measuring tape and pencil. Draw a horizontal line across the wood at the mark, using the ruler and pencil, and cut the wood along the line with the saw.

  6. 6

    Clamp the wood to a sturdy work surface, using the wood clamps, and cut out the bracket along the tracing line of the template, using the saw.

  7. 7

    Sand any rough edges on the brackets, using the 80-grit sandpaper. Finish sanding the brackets smooth, using the 120-grit sandpaper.

Tips and warnings

  • Apply a coat of exterior paint or stain to untreated wood brackets to protect them from the weather.
  • Use a French curve drafting tool to add curvy design details to your bracket.
  • Space your brackets no more than 3 feet apart to best support a heavy planter.

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