How To Build and Install A Window Box Planter

Michele Phillips
Few Hours
Less Than $500

I'm excited to share this cute little DIY with you guys. With everything slowing down and us laying low at home these days, it has given us the chance to catch up on some projects we haven't had time to do until now (gotta find the silver linings right!).

It feels so good to be finally finishing up our little barn/shelter for the pony and I wanted to add a little flower box to the tack room window. Originally, I was going to do more of a traditional and simple window box, but literally last minute I had a vision for it and I'm so happy with how it all came together.

You guys may remember this little dress up wardrobe Steve made Harlan years ago along with its little scalloped edge. It kinda pioneered my love for it and when we were designing the barn I knew I wanted that cute little touch added again.

I had Steve make sure he took note of exact measurements, etc.. He is so talented at making and building things and most of the time he just kinda wings it and cuts as he goes (kind of like someone who never follows a recipe when they cook). So I made sure he wrote everything down that he did and he's given as much detail as he can on how to make it.

Everything we used to make the flower box is from Lowe's. I've been a huge fan ever since we built our house. SO many of the things in our home were from there, so I'm excited to be partnering with them on this quick and fun DIY!

What You Need for This Project

  1. 1

    Cut the fascia board into four pieces. The ones that will be the front and back of the box should be 36" and the sides are 8". Cut all pieces on edge at a 45 degree angle to give you a nice square box.
  2. Steps:

  1. 2

    On the front and back pieces, drill three pilot holes on each side where screws will go to connect with the side pieces. One top, middle, bottom. The pilot holes should be just a hair smaller than the screw.
  2. Steps:

  1. 3

    Apply wood glue in a line from top to bottom over the pilot holes. This will help the corners to stay true in the outside elements.
  2. Steps:

  1. 4

    Line up front, back, and side and get ready to screw together. This works well on a flat surface. Start screwing box sides together. Start on one corner and work your way around, screwing in  3” screws per corner where you drilled your pilot holes. The pilot holes help the wood from splitting.

    Note: when you drill in the corners you may need to line up you corner not square, the screw will want to pull the corner in resulting in an uneven corner. You will know what I mean when you try the first one!
  2. Steps:

  1. 5

    Once all the corners have been glued and screwed together, you will need to cut the base. Using the chop saw, cut the remaining 2x8 down to 33 1/2” long. Then, using the table saw, rip the 33 1/2” base piece down to 5 1/2” wide. This will fit in the base.
  2. Steps:

  1. 6

    Before you put the base in, you will want to drill a pilot hole roughly every 6” and use the counter sink bit lightly on the pilot hole. This will leave a nice clean hole easy to caulk later. When you place the base piece in make sure it is nice and flush. Again, this is easier on a flat surface. Use 3” screws and start screwing in the base piece.
  2. Steps:

  1. 7

    Use caulking to fill the screw holes and any cracks. Once the caulking is dry, use two coats of paint on base. The kids can help with this step!
  2. Steps:

  1. 8

    While the paint is drying, make the scallops.

    Using the chop saw, cut the 1x4 fascia on a 45 degree angle on both sides (37 1/4" long). Then, cut two 8 and 5/8 pieces for the sides (one side will be a 90 degree cut, the other a 45 degree to match the front piece). Once you have the pieces cut, set your compass to 1 1/2 inches and make essentially make half circles along the bottom of the fascia.

    TIP: Practice this a few times on some scrap pieces of wood until you find your groove.
  2. Steps:

  1. 9

    After the scallops are laid out and traced on the 1x4 fascia, use a jig saw to cut them. Drill pilot holes and counter-sink holes on the scallops before painting.

    Once dry, mount scallops onto the top of the flower box with 1 1/4 " screws in the pre-drilled holes, making sure the front corners are good and tight.

    TIP: If there are any gaps or cracks, use caulking to blend or fix.
  2. Steps:

  1. 10

    Once dry, add final touch-up of paint and it's ready to hang! After it was hung we added soil and flowers to it.
  2. Steps:

About the Author

Michele Phillips

Michele Phillips

Michele Phillips is a wife and mom of 5 currently building her dream home in Abbotsford, B.C. She blogs about family, motherhood, design and DIYs at What Dreams May Become.

Follow her on Instagram.

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