How to Build Wooden Flower Boxes


Flower boxes are a form of container gardening that allow a homeowner to display beautiful flowers anywhere in the house-indoors and outside. You can hang them outside your windows; set them on the edge of your deck or patio step or place them flush against a wall outside to enhance curb appeal. Portability and ease of movement make them a popular choice for professionals and home gardeners alike. Custom-make wooden flower boxes according to your taste and requirements instead of spending money on store bought ones.

Step 1

Determine where to place the flower box so you can decide the dimensions accordingly. Measure the length of the window if hanging it there so it is equally long. Decide its length, depth and width. If placing it on the ground, opt for two medium sized boxes in place of a very long one, which is difficult to move when filled with soil. Measure the spot and note the dimensions down on paper.

Step 2

Purchase boards of pressure treated wood from a hardware store. Have a professional cut them to size for you, or do it yourself with a saw. You can select pine, cedar, oak, teak, redwood or any other type of wood, depending on your budget and personal taste. Keep in mind that softwoods such as pine are soft and easy to work with, but tend to decay with time when placed outside, even if painted. Your flower box will comprise of five boards- two long boards for the front and back, two smaller boards for the side pieces and a base as wide as the sides but as long as the front and back.

Step 3

Drill drainage holes in the base piece, spaced 4 to 6 inches apart. Place the base piece on an even surface, and hold the front piece next to it. Make sure the lower edge of the front is flush against the long edge of the base piece before joining them together by drilling a row of 1-inch woodscrews into them, spaced 3 to 5 inches apart.

Step 4

Hold the structure firmly in place as you place one of the side pieces against the short edge of the base. Align it so their tops are even, and join them together by drilling screws through the base and the front that penetrate the side and hold it firmly. Repeat the procedure with the other short edge and the back piece.

Step 5

Check the stability of the window box to make sure it is sturdy and all the joints are secure, and reinforce any joint by drilling woodscrews in place.

Step 6

Sand the edges of your flower box to make them smooth, removing any dust with a hand broom. Paint it a bright color so it stands out, and allow it to dry thoroughly overnight.

Things You'll Need

  • Measuring tape
  • Notepad
  • Pencil
  • Five wooden boards, 1-inch thick
  • Handsaw
  • Drilling machine
  • Galvanized woodscrews
  • Sandpaper
  • Paint


  • How to Make a Wooden Planter Box
  • How to Build a Flower Box

Who Can Help

  • Window Boxes
Keywords: flower box, wooden flower box, diy flower box

About this Author

Tanya Khan is a freelance author and consultant, having written hundreds of thousands of words for various online and print sources. She has an MBA in Marketing but her passion lies in giving her words wings.