How to Build Deck Rail Planter Boxes


Deck railing planters are visually appealing and can be placed in strategic locations to create an attractive patio privacy barrier when planted with a mixture of flower types for height and length. It is easy to create multiple attractive cedar planter boxes at home with limited supplies. The box size can be adjusted to fit the length of your deck railing.

Step 1

Cut wood sides out of cedar fence pieces. Cut two side sections that are ¾ inch by 5-1/2 inches by 25-1/2 inches.

Step 2

Cut one bottom piece that is ¾ inch by 5-1/2 inches by 24 inches.

Step 3

Cut two end cap pieces that are ¾ inch by 4-3/8 inches by 5-1/2 inches.

Step 4

Cut four spacer pieces that are ¾ inch by 1-1/2 inches by 1-1/2 inches.

Step 5

Nail the end cap pieces to the side pieces at the top and bottom. Make sure the top of all pieces match. The sides will be longer than the end cap pieces.

Step 6

Drill three evenly spaced ½-inch drainage holes into the bottom piece.

Step 7

Nail the four spacer pieces to the bottom of the box by placing one in each corner making them flush with the end cap pieces. Set the spacer pieces so they are sitting ¾-inch high and 1-1/2 inches long and wide.

Step 8

Set the bottom of the box on top of the spacers by dropping it through the top of the planter. Use a hammer to gently tap it in place if necessary. Nail the bottom to the sides of the box.

Step 9

Set the planter box on the rail of the deck. The side panels are longer than the end caps and will hold the planter in place.

Things You'll Need

  • 1 cedar plank 3/4-inch by 6-inch by 8-feet
  • Saw
  • Hammer
  • Nails
  • Plastic liner
  • Bike hooks


  • RunnerDuck Resources: The RunnerDuck Deck Rail Planter
  • Black & Decker Power Tools: Railing Planter
  • Universal Forest Products: Railing Planter
Keywords: deck rail planter, patio planter box, cedar planter box

About this Author

Jennifer Loucks has over 10 years of experience as a former technical writer for a software development company in Wisconsin. Her writing experience includes creating software documentation and help documents for clients and staff along with training curriculum. Loucks holds a Bachelor of Science major from the University of Wisconsin - River Falls specializing in animal science and business.