How to Build a Window Flower Box

Apartment living rarely affords you the opportunity to enjoy a flower garden. However, most places can accommodate a window box in which to grow the flowers or vegetation of your choice. Depending upon the amount of available light and the size of the box, you can plant an herb garden, a mini rose garden, beautiful greenery and much more. The steps below outline the building of a very simple, rectangular flower box that is meant to be set on a window ledge or attached directly to it.

Things You'll Need

  • Wood of choice
  • Finish molding
  • Saw
  • Hammer and nails
  • Safety glasses
  • Mask
  • Rubber gloves
  • Stain or paint
  • Clear acrylic topcoat
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Instructions

    • 1

      Determine the size of the box your window can hold (length, width and depth) and decide on a type of wood to use. Be sure to choose wood that can withstand the changing elements, like a pressure-treated redwood.

    • 2

      Cut out the pieces to your window box using the dimensions you obtained in Step 1.

    • 3

      Lay the bottom piece of wood onto a flat surface. Place the back of the window box flush against the back edge of the bottom piece and temporarily secure with a single nail or staple.

    • 4

      Place one side of the window box inside the back piece, making sure the joint is even and solid. When you have achieved a perfect angle, nail the pieces together. Repeat the same process with the other side.

    • 5

      Put the front section of the window box into place opposite the back. Square the corners and joints and then nail the piece into place.

    • 6

      Turn the widow box over with the temporarily secured bottom on top. Square the corners and joints and then nail the bottom of the window box into place.

    • 7

      Sand away any and all rough edges until the box is perfectly smooth on all sides. If desired, attach a finished piece of finish molding around the top of the box to give it a more polished look.

    • 8

      Stain or paint the box the color desired. Finish off with a protective clear acrylic coating that is resistant to the elements.

    • 9

      Drill a few small holes into the bottom of the box for drainage.

    • 10

      Add gravel to the bottom of the window flower box to assist in drainage.