Published May 12, 2020

DIY Cedar Window Flower Boxes

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Written by Jamie Reece

DIY Cedar Window Flower Boxes header image.

How to build a simple window box out of cedar fence boards to boost curb appeal.

TOTAL TIME: 2 hours


Materials

  • Cedar Fence Boards
  • Construction Screws
  • Clear Plastic Sheeting 
  • Gravel
  • Potting Soil
  • Flowers/Greenery

Tools

  • Chop Saw
  • Table Saw
  • Nail Gun & Nails
  • Drill
  • Scissors
  • Trowel (for planting)

Instructions

1. Cut 3 cedar boards to the width of your window.
2. Rip 1" off of one of those boards for the bottom.
3. Measure and mark another cedar board end for your side piece with the width of your board at the top and the width minus 1" at the bottom. Cut 3 of those.
4. Trim one of those into the support by cutting 1" off the bottom (narrow side) and 2" off the top (wider side.)
5. Glue and nail the back into the sides and then the front into the sides.
6. Push the bottom into the box and nail in from all sides with nails spaced at 4" all the way around.
7. Glue and nail in the middle support.
8. Rip another cedar board into two strips each 1.5" wide.
9. Use those strips to build a mitered frame for the top with 1/4" overhang and install one piece at a time nailing into the box and into each other.
10. Screw the box into the house's siding and studs under the window trim with construction screws.
11.Drill holes along the bottom for water drainage.
12. Line with plastic, add gravel and potting soil, and plant your flowers!

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