Project Guide

How to Build a Hexagon Planter

Measure and Mark Cuts
Hexagon planter

Mark the boards with a pencil, following this cut list:

On the eight 2- x 12-inch x 8-foot pressure treated boards: 

  • Twelve exterior boards: 30-inch pieces with an inside angle of 30 degrees 
  • Twelve interior boards: 28 ½-inch pieces with an inside angle of 30 degrees

On the two 1- x 3-inch x 8-foot polar boards:

  • Six exterior trim pieces: 30 ½-inch pieces with an inside angle of 30 degree
  • Six interior trim pieces: 28-inch cuts pieces an inside angle of 30 degree
  • Six 6-inch pieces

Note: The planter put together in this project has a 60-inch diameter with 30-inch sides, and a total height of 24 inches. If you would like to make a different sized hexagon planter, the radius is equal to the length of the six planter sides. For example: A 48-inch diameter planter would have 24-inch sides. Adjust accordingly to fit your needs.

Make the Cuts
Hexagon planter

Using your 12-inch sliding compound miter saw, cut all the pieces you marked. 

Tip: You can also have all of your lumber cut in store. Ask a Home Depot associate to help you when you pick up your materials. 

Paint or Stain the Wood
hexagon planter

Paint or stain the wood the color of your choice.

Assemble the Hexagon Shape
hexagon planter
  • Glue the exterior bottom pieces together to create the hexagon. 
  • After the glue has dried, drill the 3 in. exterior wood screws to reinforce each side. 
  • Repeat this step to create the exterior top hexagon. 

Tip: Pre-drill the holes to ensure your wood does not crack.

Build the Interior Planter
hexagon planter
  • Measure and mark twelve inches from the edge of an interior 28 ½-inch board. 
  • Glue a second interior board on the mark you just made to the first board. 
  • Repeat this five more times until you have completed the interior of the hexagon planter. 
  • After the glue has dried, screw the 3-inch exterior screws into the interior and exterior boards to reinforce the structure. 
  • Place the interior boards inside the hexagon frame and attach using the 3- inch exterior screws. 
  • Repeat this step to assemble the interior top of the hexagon. 

Tip: Do not attach the interior top structure until after completing the next step.

Attach the Outer Panels
hexagon planter
  • Stack the second hexagon on top of the first one. This will make a 60- x 24-inch  planter. 
  • Join the top and bottom planters together with 6-inch poplar boards or scrap lumber. 
  • Drill 2-inch exterior wood screws into each panel. You can also use metal straps for this step. 
  • Stack the top interior boards on top of the bottom interior boards, and attach them to the exterior hexagon frame.

Tip: If you prefer a shorter planter, simply make one hexagon instead.

Attach the Trim
hexagon planter
  • Glue the 30-inch poplar pieces to the outside trim of the planter so there is an overhang of half an inch on the inside and outside edge of the planter. 
  • Use the 28-inch pieces as trim for the inner panels.
  • Hammer in the finishing nails to reinforce the trim. This gives a nice finished look to the trim.
Fill with Soil
hexagon planter
  • Position your planter before pouring your soil. 
  • Make sure your planter is set on a level surface. For better drainage, add one to two inches of gravel to the bottom of your planter prior to adding soil. 

Tip: If you place your planter on your patio, you can put a piece of ¾-inch plywood between the two outside boards. If you do this, you will not need to make the inner bottom panels. Stain and waterproof the plywood, then drill drainage holes into the plywood so that water can drain from the soil.